Tests of Between-Subjects Effects
Q: Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine…
A: The given data set is. Swimmers 10 8 7 9 13 7 6 12 Soccer 7 4 9 3…
Q: Are Japanese managers more motivated than American managers? A randomly selected group of each were…
A: In order to determine whether the average SSATL scores of Japanese mangers is significantly…
Q: Analysis of Variance Source df SS MS F p Factor 3 36.14 12.05 8.37 0.002 Error 13 18.74 1.44…
A: The provided information is Source df SS MS F p Factor 3 36.14 12.05 8.37 0.002 Error 13…
Q: According to a certain government agency for a large country, the proportion of fatal traffic…
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Q: Morgan City Fire Chief Sidney Pyro is concerned about the low efficiency scores that his…
A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…
Q: 3. The following data were obtained from a repeated-measures study comparing three treatment…
A: The hypothesis to be tested here is - H0:μ1=μ2=μ3H1:Atleast one of the mean is different The table…
Q: In exercise 18 the data on price ($) and the overall score for six stereo headphones tested by…
A: In exercise 18 the data on price ($) and the overall score for six stereo headphones tested by…
Q: ANOVA table. Using α =.05 state the conclusion in APA format. Tests of Between-Subjects Effects…
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Q: a) and (b) below. Use a 0.01 significance level for are from populations with the same mean. heses?
A: Let X1 be the random variable such that x̅1: Sample mean of s1: Sample standard deviation of n1:…
Q: In single-factor ANOVA, when the calculated value of the test statistics, F*, is greater than the…
A: We want to tell you which one is the correct choice.
Q: ANOVA is a one-tailed test and we are concerned only with those outcomes in which there is more…
A: Based on the concept of ANOVA, there is more variance between categories than within categories.
Q: Which of the following is the appropriate statistic for describing the effect size in a two-sample…
A: Find the appropriate statistic for describing the effects size in two-sample experiment
Q: . May conducts a design of experiment and the following is the result of ANOVA analysis. The esult…
A: Given information: The results of ANOVA analysis for the design of experiment conducted by May is…
Q: 1. A psychologist is studying the effects of noise on concentration. The scores below are the number…
A: Given: The provided data is: Quiet Low noise Moderate noise Loud noise 2 3 4 6 0 1 2 4 1 2…
Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…
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Q: The following data were obtained from an independent-measures research study comparing three…
A: Given information: The data represents the descriptive for the 3 groups of treatment.
Q: For a sample of 400 correctional officers at Lucasville State Prison, a researcher believes there is…
A: It is given that:
Q: In a study to determine if the nitrogen content of the soil in Wyoming is significantly different…
A: Solution: State the hypotheses. Null hypothesis: H0: The nitrogen content of the soil in Wyoming is…
Q: A veterinarian is interested in researching the proportion of men and women cat owners and believes…
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Q: A study of the effect of television commercials on 12-year-old children measured their attention…
A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts. In case…
Q: Morgan City Fire Chief Sidney Pyro is concerned about the low efficiency scores that his…
A: A two-sample independent t-test is performed to test if there is a statistically significant…
Q: A senior accounting major at Midsouth State University has job offers from four CPA firms. To…
A: The following information has been provided: Analysis of Variance Source df SS MS F p Factor…
Q: QUESTION 6 Test the claim that the proportion of people who are confident is smaller than 90% at the…
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Q: A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20…
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Q: A repeated-measures ANOVA has SSwithin treatments = 14 and SSbetween subjects = 8. For this…
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Q: A researcher reports an F-ratio with dfbetween = 2 and dfwithin = 30 for an independent-measures…
A: Given : dfbetween = 2 anddfwithin = 30 Let k denote the number of treatments. Let N denote the…
Q: Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine…
A: Given, let 1: swimmers 2: Soccer players so, n1 = 8, xbar1 = 9, s1 = 2.507 and n2 = 5, xbar2 = 6, s2…
Q: An article reports that blue eyed people earn less than brown eyed people, with these numbers:…
A: P-value is much greater than 0.05 level of significance.
Q: Treatments Person Person II Totals P = 6 P = 9 P = 18 P = 12 EX = 350 A 2 4 B 3. 6. N = 15 7 8 G =…
A: ANOVA: The analysis of variance (ANOVA) is used to determine whether there are any statistically…
Q: A study of the effect of television commercials on 12-year-old children measured their attention…
A: As per bartleby policy I answered the a to f subparts
Q: Can vaccination be regarded as preventive measure for smallpox, from the data given Below? Of 1,482…
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Q: A study was done to look at the relationship between number of vacation days employees take each…
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Q: A senior accounting major at Midsouth State University has job offers from four CPA firms. To…
A: Given Consider the survey conducted regarding the number of months that were worked before receiving…
Q: a. What are the null and alternate hypotheses? b. What is the test statistic? (Round your…
A: Given that Analysis of Variance Source df SS MS F p Factor 3 39.56 13.19 9.77 0.001 Error…
Q: What statistical test would you use for each of the following scenarios? What would you set your…
A: Solution is given below
Q: alculate the difference scores and MD. b. Compute SS, sample variance, and estimated standard…
A: The data given is as follows B A 7 8 2 9 4 6 5 7 5 6 3 8 Sample size (n) = 6 α =…
Q: A repeated measures study using a sample of n=32 participants would produce a t statistic with df=…
A: Given problem is : A repeated measures study using a sample of n=32 participants would produce a t…
Q: For a two-factor ANOVA with two levels of factor A, two levels of factor B, and a separate sample of…
A: ANOVA with two levels of factor A, two levels of factor B, and a separate sample of n = 5…
Q: A study of the number of business lunches that executives in the insurance and banking industries…
A: Given data :Samples : n1=40 n2=50mean :x1= 9.1 x2= 8.0Standard Deviation :…
Q: In a single-factor ANOVA if the value of MSreatments = 50 and MSE = 10, the value of the test…
A: For the given data Find test statistic = ?
Q: According to a recent poll, the percentage of Americans who would vote for the incumbent president…
A: Since p- value = 0.1090 > 0.10, we fail to reject H0
Q: A researcher wanted to determent mine if there was a significant difference in fat content between…
A: For the above problem we should use t-test for difference of means.
Q: Which of the following is true at the 5% significance level according to the Minitab ANOVA output…
A: In order to determine whether the relevant factor has a significant effect on the response, a…
Q: The following data were obtained from an independent-measures research study comparing three…
A: To testH0:μ1=μ2=μ3H1:μ1≠μ2≠μ3
Q: In one study of smokers who tried to quit smoking with nicotine path therapy,38 were smoking one…
A: Answer:- Here we have to test the claim that among smokers who try to quit with nicotine patch…
Q: A researcher conducts an independent-measures study comparing two treatments and reports the t…
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Q: a. Assume that the data are from an independent- measures study using three separate samples, each…
A: Given : We have given that three independent treatments with n=4 participants .The grand total= 48…
Q: If the p-value is less than alpha in a one-tail test, what conclusion can you draw?
A: We need to use the concept of hypothesis testing
A researcher believes that gender and having an older sibling affects language learning in preschoolers. He has 24 preschoolers, 12 Male and 12 female and half of each gender have an older sibling and half do not. He measures their language development. The results are included in the following 2 X 2 ANOVA table. Using ?α =.05 state the conclusion in APA format.
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- The hypothesis that suggests that an experimental treatment has no effect on a dependent variable would be known as the __________ hypothesis. reliability alternative statistical null validityHamstrings Athletes who had suffered hamstringinjuries were randomly assigned to one of two exerciseprograms. Those who engaged in static stretchingreturned to sports activity in a mean of 15.2 days fasterthan those assigned to a program of agility and trunkstabilization exercises. (Journal of Orthopaedic & SportsPhysical Therapy 34 [March 2004]: 3)a) Explain why it was important to assign the athletes tothe two different treatments randomly.b) There was no control group consisting of athleteswho did not participate in a special exercise program.Explain the advantage of including such a group.c) How might blinding have been used?d) One group returned to sports activity in a mean of37.4 days 1SD = 27.6 days2 and the other in a meanof 22.2 days 1SD = 8.3 days2. Do you think thisdifference is statistically significant? Explain.Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires caused by humans in the west? 360 of the 501 randomly selected wildfires looked at in the south were caused by humans while 435 of the 588 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the = 0.10 level of significance? For this study, we should use Select an answer t-test for the difference between two dependent population means z-test for the difference between two population proportions t-test for a population mean t-test for the difference between two independent population means z-test for a population proportion The null and alternative hypotheses would be: Select an answer μ1 p1 Select an answer < ≠ > = Select an answer μ2 p2 (please enter a decimal) Select an answer μ1 p1 Select an answer > ≠ < = Select an answer p2 μ2 (Please enter a decimal) The test statistic ? z t = (please show your…
- Hauz of Gaz claims that more than two-thirds of the houses in a certain subdivision use their brand. Is there a reason to doubt this claim if 25 out of a random sample of 40 houses in the subdivision use the company's brand? Test the claim at 0.01 level of significance. What is the value of the test statistic? (a) 0.6053 (b) 0.6503 (c) -0.6053 (d) -0.6503 Based on the result on the comparison between critical and computed value, what can be concluded? (a) There is enough evidence to reject the claim that more than two-thirds of the houses in the subdivision use Hauz of Gaz brand (b) There is not enough evidence to reject the claim that more than two-thirds of the houses in the subdivision use Hauz of Gaz brand (c) Accept the null hypothesis (d) The given information is not enough to make any conclusionA researcher notes that there seems to be a difference in the prevalence of diabetics who smoke and consume diets hign in processed food and the prevalence of diabetics who do not smoke and do not consume diets high in processed foods. Use the appropriate hypothesis to test for independence of two independent variables presented here at the 5% significance level to ensure comfounding has not influcenced the study's results. Then interpret your response. Diet Low in Processed Foods Normal BP High BP Total College Education 124 55 179 High School Education 69 152 221 Total 193 207 400 Diet High in Processed Foods Normal BP High BP Total College Education 64 85 149 High School Education 98 153 251 Total 162 238 400 Multiple choice answers: The chi-square value of 158.652 is higher than the chi-square value of 3.84, therefore we can accept H0 at the 5% level and reject H1, which states that…A researcher wants to know whether a coin used to decide the order of play during a basketball game is weighted toward heads (one-tailed test). He tosses the coin 20 times. If the critical value is 15, and he flips the coin and gets 18 heads, he would______________. (hint: Critical value is a point on the test distribution that is compared to the obtained statistic to determine whether to reject the null hypothesis.) retain the null hypothesis, suggesting that the coin is NOT biased towards heads. reject the null hypothesis, suggesting that the coin is biased towards heads.
- The manager of a concert production company analyzes a regression relating ticket sales to the independent variables "spending on advertising" and "unemployment rate" in the region. The regression was based on a random sample of 30 observations. She computes the D-W statistic to be 1.2 to determine if positive autocorrelation might be a problem. At the 5% significance level, what can we conclude? Multiple Choice We do not reject the null hypothesis and conclude there is likely no autocorrelation. We reject the null hypothesis and conclude there is likely positive autocorrelation. he test is inconclusive. We cannot say whether positive autocorrelation exists. We reject the alternate hypothesis and conclude that there is likely no positive autocorrelation.A pet food producer manufactures and then fills 25-pound bags of dog food on two different production lines located in separate cities. In an effort to determine whether differences exist between the average fill rates for the two lines, a random sample of 19 bags from line 1 and a random sample of 23 bags from line 2 were recently selected. Each bag’s weight was measured and the following summary measures from the samples were reported: Production Line 1 Production Line 2 Sample Size, n 19 23 Sample Mean, x 24.96 25.01 Sample Standard Deviation, s 0.07 0.08 Management believes that the fill rates of the two lines are normally distributed with equal variances. a) Calculate the point estimate for the difference between the population means of the two lines. b) Develop a 95% confidence interval…A new method of postoperative treatment was evaluated for patients undergoing a certain surgical procedure. Under the old method, the mean length of hospital stay was 6.3 days. The sample mean for the new method was 6.1 days. A hypothesis test was performed in which the null hypothesis stated that the mean length of stay for the new method was greater than or equal to the mean length for the old method, and the alternate hypothesis stated that the mean stay for the new method was lower. The P-value was 0.002. True or false: a) Because the P-value is very small, we can conclude that the new method provides an important reduction in the mean length of hospital stay. b) Because the P-value is very small, we can conclude that the mean length of hospital stay is less for patients treated by the new method than for patients treated by the old method.
- A health insurance company in country A sells policies to tourists who intend to visit the US for less than 3 months. To limit its financial exposure, it requires applicants to undertake a physical examination and meet specified criteria for different tests. To simplify the problem, let us assume that only one test is done and it measures cholesterol level of the applicant. Historical records in country A indicate that cholesterol level is normally distributed with a mean of 225 milligrams per deciliter (mg/dL) and a standard deviation of 39.5 mg/dL. High cholesterol levels increase the risk of a cardiovascular incident, for which the company may need to make major insurance payouts. The premium charged is a flat $3000/person for those who qualify. For planning purposes, assume the company will get 100,000 applications in a particular year. [show your calculations for all parts] a. The current threshold T for cholesterol is set by the company at 250 mg/dL. Anyone whose test result is…A data set from a study that examined the effect of a specific diet on blood pressure is below. Participants (n = 72) were randomly assigned either to a group that was put on the diet (Diet = Present) or to a group that was not put on the diet (Diet = Absent), and researchers wanted to know whether the diet had a significant impact on blood pressure. Before conducting the test, evaluate the normality assumption for the test and report the results (i.e., is the assumption reasonable for this analysis/data set?). Biofeedback Drug Diet BldPres Present X Absent 170 Present X Absent 175 Present X Absent 165 Present X Absent 180 Present X Absent 160 Present X Absent 158 Present X Present 161 Present X Present 173 Present X Present 157 Present X Present 152 Present X Present 181 Present X Present 190 Present Y Absent 186 Present Y Absent 194 Present Y Absent 201 Present Y Absent 215 Present Y Absent 219 Present Y Absent 209 Present Y Present 164…A researcher was interested in studying the best way to teach suturing and casting to surgicalresidents. To study this, all incoming orthopaedic residents were divided into three groups: astandard training group scheduled to work in the emergency department (n=8), an instructor-led surgical skills boot camp group (n=8), and student-led surgical skills boot camp group (n=8).After 7 days of the intervention, suturing and casting skills were measured through asimulation-based exam. The researcher wants to know whether average exam scores differbetween the three groups. Under the heading “Results” present your findings (i.e., what you found).Include at least one measure of central tendency and variability. An assumption check(describe what you did and what you found, as needed), check for potential outliers,and present the findings of your inferential test (i.e., your critical value and p value), asappropriate. Participant Average Exam Score (%) Intervention 1 50 On service 2 60 On…
