A group of public health nutrition students determined whether mung bean (Vigna radiata) can support growth by performing an experimental growth assay on 30 Sprague Dawley rats. Fifteen rats were randomly allocated to the experimental group and the remaining fifteen were allocated to the control group. The rats were fed ad libitum for two weeks. The experimental group received feeds composed of mung bean while the control group received standard rat feeds. The mean weight of both groups was taken before and after the indicated feeding period. Test the hypothesis that mung bean better supports growth of the Sprague Dawley rats than the standard rat feed. Experimental Group Control Group Mean weight (in grams) before feeding Mean weight (in grams) after feeding SD of weight (in grams) before feeding SD of weight (in grams) after feeding 43.03 43.88 46.30 94.60 2.73 3.25 4.76 3.65
Q: Were the two laboratories measuring the same thing? (Assume normality and common variance.) Be sure…
A:
Q: It was desired to compare the effectiveness of two different diets. A random sample of n = 15 people…
A: Given that Sample sizes n1=15 , n2=15 Sample means X̄1=10 , X̄2=8.3 s12 =4.3…
Q: n a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at…
A: First we perform ANOVA for two-way with 3 observations per cell using excel: Step 1: Enter the data…
Q: Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars,…
A: Given information: Table representing given data: Compact cars Midsize cars full-size cars…
Q: The article “Well-Fed Crickets Bowl Maidens Over” (Nature Science Update, February 11, 1999)…
A: The hypothesis test is used to understand by testing the difference between the sample mean and the…
Q: A food manufacturer claims that eating its new cereal as part of a dally diet lOwers tulal DIUUU…
A: A food manufacturer claims that eating its new cereal as part of a daily diet lowers total blood…
Q: The following data were obtained from an independent-measures research study comparing three…
A: State the hypotheses. That is, there is no significant mean differences among the treatments. That…
Q: In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at…
A: Note: Since you have posted a question with multiple subparts, we will solve the first three…
Q: In one study of smokers who tried to quit smoking with nicotine path therapy, 41 were smoking…
A: a. It is needed to test the claim that whether the proportion of smokers who try to quit with…
Q: The article "Well-Fed Crickets Bowl Maidens Over"t reported that female field crickets are attracted…
A: Confidence interval is the interval that is proposed to estimate an unknown parameter. The boundary…
Q: The article “Well-Fed Crickets Bowl Maidens Over” (Nature Science Update, February 11, 1999)…
A: Given data : sample size, n = 22 sample mean, x̄ = 65.32 sample standard…
Q: Functionally important traits in animals tend to vary little from one individual to the next within…
A: From the given Information,The Data values are,1.53, 1.06, 0.93, 1.38, 1.47, 1.2, 1.16.
Q: Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars,…
A: Given observation and calculation is shown below Compact cars Mid-size cars Full size cars…
Q: Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars,…
A: Solution Option C) 5.14
Q: A clinical trial designed to show the efficacy of a new drug in reducing progression to hypertension…
A: From the provided information, The sample proportion of progression to hypertension (new drug) p̂new…
Q: In the article "Experimental Measurement of the Stopping Performance of a Tractor- Semitrailer from…
A: Given data 32.1, 30.6, 31.4, 30.4, 31.0, 31.9
Q: Twenty laboratory mice were randomly divided into two groups of 10. Each group was fed according to…
A: (a) Let μA be the population mean weight gain on diet A, and μB be the population mean weight gain…
Q: Here are data from an experiment studying the effect of age on creativity scores:
A: Given, the data of the effect of age on the creativity score. Age 4 Age 6 Age 8 Age 10 3 9 9 7…
Q: Thilothammal et al. (A-19) designed a study to determine the efficacy of BCG (bacillus…
A: a) Enter the data into Google Sheets. Select the data and click on Analysis ToolPak Add-in. Click on…
Q: b)What assumption is needed to run a parametric test for this research project? (pick 1-4) 1)…
A: Given that Sample size n = 26 Sample mean = 64.04 Sample SD = 10 Note : According to our guidelines…
Q: A news article reported that college students who have part-time jobs work an average of 15 hours…
A:
Q: The National Transportation Safety Board wants to look at the safety of three different sizes of…
A:
Q: In a study examining the effect of room temperature on academic performance, researchers tested…
A: Given: Level of significance, α = 0.05 Two tailed-test. t(22) = 2.44, p < .05, η2 = .21. Mean…
Q: uppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars,…
A:
Q: A collar manufacturer is considering the production of ew type of collar to attract young men. The…
A: We have given that, X:- 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 f :- 4 19 30 63…
Q: The article “The Effects of a Low-Fat, Plant-Based Dietary Intervention on Body Weight, Metabolism,…
A: Two sample t-test: Two sample t-test is used to test the significance difference between two group…
Q: The one-way ANOVA partitions the total variability into into a. Sswithin and MSbetween…
A: Solution: The linear mathematical model for one way ANOVA is yij=μ+αi+εij i=1:k, j=1:nWhere yij = j…
Q: The quality control department of a soup brand is concerned that its soups contain more MSG than the…
A: Note: " Since you have posted many sub-parts. we will solve the first three sub-parts for you. To…
Q: AutoTrader.com would like to test if a difference exists in the age of three different types of…
A:
Q: The table to the right shows the cost per ounce (in dollars) for a random sample of toothpastes…
A: ( b ) d.f N is = ? d.f D is = ? The critical value = ? The rejection region is ?
Q: In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at…
A: (a)
Q: The article "Well-Fed Crickets Bowl Maidens Over" (Nature Science Update, February 11, 1999)…
A: Given: x¯=66.6s=16n=25μ=60
Q: Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars,…
A: State the hypotheses.
Q: The following SPSS output examines the percent of security staff that is female at private and…
A: Given the SPSS output examines the percent of security staff that is female at private and public…
Q: Functionally important traits in animals tend to vary little from one individual to the next within…
A: Obtain the value of the standard deviation of this measurement in three-toed sloths. Use EXCEL…
Q: The accompanying data table includes weights (in grams) of a simple random sample of 40 quarters…
A: Levene's test for equality of variance : This test is used to determine whether samples have equal…
Q: A study randomly assigned adult subjects to one of three exercise treatments: (1) a single long…
A: Given From given information By using ANOVA calculator
Q: a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at 5…
A: *Answer: b)Applying two way ANOVA from megastat: Goliath Varmint Weasel total Head-On 983.3…
Q: In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at…
A: An experimental design is a way to carefully plan experiments in advance so that the…
Q: Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars,…
A: 1) Null hypothesis: H0:µ1 = µ2 = µ3 Alternative hypothesis: H1: At least one of the means is…
Q: Suppose an architectural firm specializing in the structural restoration and renovation of historic…
A: From the given information, μ=65σ=12.6n=81M=67.3 Type II Error: The type II error occurs if “fail to…
Q: In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: In a bumper test, three test vehicles of each of three types of autos were crashed into a barrier at…
A: It is given that, three test vehicles of each of three types of autos were crashed into a barrier at…
Q: Two groups of individuals were comp a high carbohydrate low-fat diet (LF) carbohydrate diet (LC).…
A:
Q: measured
A: Given: Exercise group N Mean Std. Dev Weight Training 20 49.7 10.2 Aerobic…
Q: A recent study indicates that simply giving college students a pedometer can result in increased…
A: The results regarding number of steps of college students after receiving pedometer is given:…
Q: The article “Well-Fed Crickets Bowl Maidens Over” (Nature Science Update, February 11, 1999)…
A: Given data : sample size, n = 22 sample mean, x̄ = 65.32 sample standard…
Q: A sample of 12 men was used in a study to test the effects of a relaxant on the time required to…
A: Here we use Wilcoxon signed rank test. a. The null and alternative hypothesis is, H0:Medin time…
Step by step
Solved in 2 steps with 2 images
- 1 (part 1). Does When Food Is Eaten Affect Weight Gain?A study was introduced that examined the effect of light at night on weight gain in mice. In the full study of 27 mice over a four-week period, the mice who had a light on at night gained significantly more weight than the mice with darkness at night, despite eating the same number of calories and exercising the same amount. Researchers noticed that the mice with light at night ate a greater percentage of their calories during the day (when mice are supposed to be sleeping). The computer output shown below allows us to examine the relationship between percent of calories eaten during the day, DayPct, and body mass gain in grams, BMGain. A scatterplot with regression line is also shown below (attached image).Pearson correlation of BMGain and DayPct =0.740P-Value =0.000--------------------------------------------------------------The regression equation isBMGain=1.11+0.127DayPct Predictor Coef SE Coef T P Constant 1.113 1.382…A local church is interested in determining how length of residence in the present community relates to church attendance. Using a random sample of 15 individuals, they gathered data on how many times in the previous 5 weeks each individual attended church services. The data are provided below. Length of residence in the community Less than 2 years 2-5 years More than 5 years 0 0 1 1 2 3 3 3 3 4 4 4 4 5 4 Using the 5-step model, determine whether and how church attendance is related to length of residence in the community. Use 5% and 1% levels of statistical significance. What are the assumptions for this problem?1 (part 2). Does When Food Is Eaten Affect Weight Gain?A study was introduced that examined the effect of light at night on weight gain in mice. In the full study of 27 mice over a four-week period, the mice who had a light on at night gained significantly more weight than the mice with darkness at night, despite eating the same number of calories and exercising the same amount. Researchers noticed that the mice with light at night ate a greater percentage of their calories during the day (when mice are supposed to be sleeping). The computer output shown below allows us to examine the relationship between percent of calories eaten during the day, DayPct, and body mass gain in grams, BMGain. A scatterplot with regression line is also shown below (attached image).Pearson correlation of BMGain and DayPct =0.740P-Value =0.000--------------------------------------------------------------The regression equation isBMGain=1.11+0.127DayPct Predictor Coef SE Coef T P Constant 1.113 1.382…
- 8 (part 2). Does When Food Is Eaten Affect Weight Gain?A study was introduced that examined the effect of light at night on weight gain in mice. In the full study of 27 mice over a four-week period, the mice who had a light on at night gained significantly more weight than the mice with darkness at night, despite eating the same number of calories and exercising the same amount. Researchers noticed that the mice with light at night ate a greater percentage of their calories during the day (when mice are supposed to be sleeping). The computer output shown below allows us to examine the relationship between percent of calories eaten during the day, DayPct, and body mass gain in grams, BMGain. A scatterplot with regression line is also shown below.Pearson correlation of BMGain and DayPct =0.740P-Value =0.000--------------------------------------------------------------The regression equation isBMGain=1.11+0.127DayPct Predictor Coef SE Coef T P Constant 1.113 1.382 0.81 0.428 DayPct…Researchers interested in lead exposure due to car exhaust sampled the blood of 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 124.32 µg/l and a SD of 37.74 µg/l; a previous study of individuals from a nearby suburb, with no history of exposure, found an average blood level concentration of 35 µg/l. Test the hypothesis that the downtown police officers have a higher lead exposure than the group in the previous study. Interpret your results in context. Based on your preceding result, without performing a calculation, would a 99% confidence interval for the average blood concentration level of police officers contain 35 µg/l? Based on your preceding result, without performing a calculation, would a 99% confidence interval for this difference contain 0? Explain why or why not.Marine biologists have noticed that the color of the outermost growth band on a clam tends to be related to the time of year in which the clam dies. A biologist conducted a small investigation of whether this is true for the species Protothaca staminea. She collected a sample of 50 clam shells in February and 27 clam shells in March. 15 of the shells from February had a dark color on the outermost growth band, whereas 8 of the shells from March had a dark color on the outermost growth band. Carry out a hypothesis test to see if there is a difference in the proportion of shells with a dark outermost growth band between the two months. The point estimate for the true difference in proportion of dark growth bands between February and March is:
- Marine biologists have noticed that the color of the outermost growth band on a clam tends to be related to the time of year in which the clam dies. A biologist conducted a small investigation of whether this is true for the species Protothaca staminea. She collected a sample of 50 clam shells in February and 27 clam shells in March. 15 of the shells from February had a dark color on the outermost growth band, whereas 8 of the shells from March had a dark color on the outermost growth band. Carry out a hypothesis test to see if there is a difference in the proportion of shells with a dark outermost growth band between the two months. Let ? = 0.01.Note: Do all calculations as February - March A) The point estimate for the true difference in proportion of dark growth bands between February and March is: I need help and webassign rejected the 0.0037 as the answer. I'm so lost. I emailed my professor and he hasn't gotten back to me. Please help. Thank you.Research Question 2: For patients recovering from Alcohol Use Disorder, are therapist-led follow up sessions (TFS) more effective in preventing relapse than Alcoholics Anonymous meetings (AA)? State the alternative hypothesis for this study.Compare the two separate scatterplots. In particular, how do the associtation compare between women with pets vs. women without pets? Does one group have more variation in systolic blood pressure than the other? If so, for which group? Does systolic blood pressure seem higher for common ages between the two groups? If so, for which group?
- Question 5 b) Twenty percent of individuals who seek psychotherapy will recover from their symptoms irrespective of whether they receive treatment. A research finds that a particular type of psychotherapy is successful with 30 out of 100 clients. Using an alpha level of 0.05 as a criterion, what should she conclude about the effectiveness of this psychotherapeutic approach?QUESTION 19 To study whether the students at a university are more or less satisfied with the current food service compared to the previous food service, a sample of 90 current students is taken and finds that 37 are satisfied with the current food service. A similar survey was taken for the previous food service in which 89 students surveyed found that 40 were satisfied with the previous food service. When testing the hypothesis (at the 5% level of significance) a higher percentage of students were satisfied with the previous food service than with the current food service, what is the test statistic? (please round your answer to 2 decimal places)A New York Times article titled For Runners, Soft Ground Can Be Hard on the Body considered two perspectives on whether runners should stick to hard surfaces or soft surfaces following an injury. One position supported running on soft surfaces to relieve joints that were in recovery from injury. The second position supported running on hard surfaces since soft surfaces can be uneven, which may make worse those injuries a soft surface was intended to help. Suppose we are given sufficient funds to run an experiment to study this topic. With no studies to support either position, which of the following hypotheses would be appropriate? 1. The second position makes the more sense, so this should be a one-sided test. In this case, we should form the alternative hypothesis around the first position. 2. Because we would be interested in any difference between running on hard and soft surfaces, we should use a two-sided hypothesis test. 3. Because there is uncertainty, we should postpone…