Is there a relationship between the number of hours per week a high school student spends on extracurricular activities and their academic performance? Variable Less than 2 2 to 12 More than 12 ABC 11 68 3 DF 9 23 5 Statistical Test = 6.926 Df =2 and Pvalue = 0.31
Q: An xbar chart is to be established based on x-doublebar=100 and sbar=8 with n=4. The control limits…
A: Given that, X-double bar=100 , s bar=8 n=4, α=0.0035 α2=0.00352=0.00175 z(α/2)=z(0.00175)=2.92…
Q: In a study, technology levels ranged from low technology to high technology. Which scale does…
A: we have given that technology levels ranged from low technology to high technology.
Q: Taxpayers who go to a treasury office to pay their contributions complain that they wait more than 7…
A:
Q: 3.Why are t statistics more variable than z-scores? The extra variability is caused by variations in…
A:
Q: The EPA tests cars for city miles per gallon (mpg). For one model, a sample of 16 cars were tested…
A: Given, Sample size = 16 Population mean = 27 The objective is to find the test statistic.
Q: The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample…
A: Given information- Population proportion, p = 0.25 Sample size, n = 460 No. of success, x = 103…
Q: Dr. Ahmed wants to study the relationship between blood pressure and heartbeat irregularities in his…
A: Given: X1 : High blood pressure (HBP) X2: Low blood pressure (LBP) X3: Normal blood pressure (NBP)…
Q: It takes an average of 11.2 minutes for blood to begin clotting after an injury. average will…
A: Note: As per the guidelines, we are only allowed to solve three subparts, please post the other…
Q: Is the stance on the death penalty independent of sex? Their obtained frequencies are: Male (Favor:…
A: For the given data Use Chi square test
Q: You are testing the null hypothesis that there is no linear relationship between two variables, X…
A:
Q: A drug company claims that an allergy medication causes headaches in 5% of those who take it. A…
A: 2. Population is a set of similar items, objects or individuals which is of interest as per the…
Q: r multiple months. For this estimation, you can write down the error term of the econometric model…
A: The variables are : 1 Independent variable Rainfall 2 Dependent variable Number of car…
Q: You run a regression analysis on a bivariate set of data (n = 86). With = 21.2 and Ⓒ = 24.3, you…
A: The correlation coefficient is 0.181.
Q: 8. Areal estate company wants to study the relationship between Home price (in OMR 1000) and the…
A: The hypotheses are defined as: H0:B2=0VsH1:B2≠0
Q: For a bivariate data, the mean value of x is 53 27, the mean velue of y is 27-9, the regression…
A:
Q: Cotinine levels were measured in a group of smokers (n = 31, x = 172.48 ng/mL, s = 119.50 ng/mL) and…
A:
Q: Let lij (i = 1,2, j = 1, 2) be the four treatment means. Show that the F-statistic for Factor A is…
A: Given information: CA=μ11+μ12-μ21-μ222
Q: A sample of 400 students of under-graduate and 400 students of post-graduate classes was taken to…
A:
Q: A researcher conducts ANOVA and calculates a test statistic of F=6.33. If there are four treatment…
A: given F= 6.33 treatment k = 4 we. know that df( treatment) = k-1 df( within) = N-k . here N is…
Q: The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample…
A:
Q: درجات The coefficient of correlation is the same as r-square. is the square of the coefficient of…
A: We know that, Coefficient of correlation is the square root of coefficient of determination. r =…
Q: A test of the claim that the proportion of students taking more than 9 units is more than 42%…
A: Given, Test Statistic: z = 1.76 The objective is to find p-value.
Q: (a) We wish to test the null hypothesis that the Las Vegas predictions are unbiased. This will…
A:
Q: b. Over the long-term, the proportion of bearish AAII members is 0.31. Conduct a hypothesis test at…
A: The hypotheses are given below: Null hypothesis: H0: p=0.31. Alternative hypothesis: Ha:p>0.31.…
Q: A social worker is interested in examining how people who have higher levels of psychological…
A: Let μd denotes the difference between the mean anxiety at 3 weeks and 6 months. The test is that…
Q: A scientist studying local lakes claims that there is a linear relationship between a lake’s level…
A: It is given that, The null and alternative hypothesis are: Ho: β1=0 , ( There is not significant…
Q: A researcher wishes to try three different techniques to lower the blood pressure of individuals…
A: Given: Three groups, i.e, Medication, Exercise and Diet.α=0.05
Q: The demand for a commodity is given by Q = Bo + B₁P+u, where Q denotes quantity, P denotes price,…
A:
Q: Indicate whether the following statements are true, false, or uncertain, and provide a short (no…
A: Summary of Statements: When y has a measurement error that is independent of x, the range of…
Q: ... a. The percentage of all possible values of the variable that lie between 7 and 16 is %. (Round…
A: Here A variable is normally distributed with mean 11 and standard deviation 2 Here take variable as…
Q: a) Compute the coefficient of variation for each population. The coefficient of variation of…
A: For population 1, mean = 500 and SD = 20 For population 2, mean = 24000 and SD = 2000 The…
Q: The average yield of soybeans in Ohio is 58 bu/Acre (the control mean). We wish to test whether a…
A:
Q: Researchers were interested in assessing whether stress levels are different at the beginning of the…
A: Solution
Q: A study was conducted to investigate how effective a new diet was in lowering cholesterol. Results…
A: Measure of central tendency measures the central or average value of a dataset. Measured of…
Q: You run a regression analysis on a bivariate set of data (n = 52). With a = 52.2 and j = 24.1, you…
A: The provided data is, The regression equation is,
Q: Systolic coefficients of variation are 14.2% and the Diastolic is 17% The coefficients of…
A: Given data the systolic coefficients of variation are 14.2%the diastolic coefficients of variation…
Q: A researcher wishes to try three different techniques to lower the blood pressure of individuals…
A: Consider that, µ1, µ2, and µ3 define the mean blood pressure for medication, exercise and diet…
Q: 2. What is the value of the test statistic of louie the geographer? а. 3.13 b. 10.37 c. 12.50 d.…
A: 2. The sum of square between is, SSB=SST-SSE=56.2-43.7=12.5 The sum of square between is 12.5. The…
Q: Dr. Ahmed wants to study the relationship between blood pressure and heartbeat irregularities in his…
A: From the given information, The data can be put in the table from.
Q: You conducted additional studies with these men and found the following: The RR for those who drank…
A:
Q: If X is a negative binomial rv, then Y= r+X is the total number of trials necessary to obtain r S’s.…
A: Given, X~Negative Binomial distribution Therefore, the moment generating function (MGF) of X is…
Q: A chi-square test for independence is being used to evaluate the relationship between two variables,…
A: To determine whether the two variables are independent or not, the test of independence needs to be…
Q: (C) is there an effect due to the length of the course? Answer: Since F< Fcrit, then we the null…
A: decision Rule : Reject H0 if F > Fcrit.
Q: The "new grapefruit diet" has been advertised to be a remarkable way to lose weight. Random sample…
A: It is an important part of statistics. It is widely used.
Q: (No. 2) Given: x₁ = 7; x₂ = 5; 5₁² = 2; 5₂² = 4; n₁ = 10; n₂ = 10 STATISTICAL TOOL: T-TEST: TWO…
A: Solution: Given information: n1= 10n2= 10x1= 7x2= 5s12= 2s22= 4
Q: Suppose data on root length (in mm) were obtained from roots from the three set-ups: (1) negative…
A: Inferential Statistics: This part of statistics deals with making conclusions from the analysis.…
Q: A researcher is testing Xanax and uses a focus group where individuals are assigned to one of two…
A: The dependent measure of the experiment is the number of numbers recalled by each participant. Each…
Is there a relationship between the number of hours per week a high school student spends on extracurricular activities and their academic performance?
Variable |
Less than 2 |
2 to 12 |
More than 12 |
ABC |
11 |
68 |
3 |
DF |
9 |
23 |
5 |
Statistical Test = 6.926 |
|||
Df =2 and Pvalue = 0.31 |
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- The department of education ran a very comprehensive study in the 1990's to determine the GPA of first generation college students (those who are the first in their family to go to college) in their freshman year. The mean GPA for first generation college students was stated in teh report to be 2.37 for males and 2.21 for females. In 2018, a consumer advocacy group is interested in whether the average GPA for first generation college females was still smaller than their male counterparts. Assume the GPA's are normally distributed. A. State the null hypothesis and the alternative hypothesis. Is the advocacy group interested in a one tail or two tail test (brief explanation)? B. Find the value of the test statistic and an associated p-value (or a range for teh p-value) if 25 males SAR yielded an average GPA 2.46 with a standard deviation of 0.16 and 25 females SAR yeilded an average GPA 2.39 with a standard deviation of 0.12. C. Determine if the test requires use of the Z table or…The Us food and Drug administration has a limit for mercury content in fish of 1.0ppm (parts per million) while in Canada the limit is 0.5 ppm. Using the variable average mercury in the Florida lakes dataset to test whether there is evidence that average mercury level of fish ( large mouth Bass) in Florida lakes is less than 1.0ppm and whether there is evidence that average mercury level of fish in Florida lakes is less than 0.5ppm. STATE THE NULL AND ALTERNATIVE HYPOTHESES? GIVE THE TEST STATISTICS AND P-VALUE? round the test statistic to two decimal places and the p-value to three decimal places. DOES THIS SAMPLE PROVIDE EVIDENCE THAT THE AVERAGE MERCURY LEVEL OF FISH (LARGE MOUTH BASS) IN FLORIDA LAKES IS LESS THAN 1.0PPM? LESS THAN 0.5 PPM : STATE THE NULL AND ALTERNATIVE HYPOTHESES. GIVE THE TEST STATISTICS AND P-VALUE ? round the test statistic to two decimal places and the p-value to three decimal places. DOES THIS SAMPLE PROVIDE EVIDENCE THAT THE AVERAGE MERCURY…In the general population, Democrats are estimated to have an average mental health index score of during this time period, with a 95% margin of error of . Respondents with MHI scores of 12 or higher are known to be at very high risk for mental health complications. Among Democrats, approximately percent are at very high risk for mental health complications. An MHI score above 7 is considered indicative of life conditions that are at least moderately stressful. Among Democrats, approximately percent are experiencing life conditions that are at least moderately stressful.
- A hospital reported that the normal death rate for patients with extensive burns (more than 40% of skin area) has been significantly reduced by the use of new fluid plasma compresses. Before the new treatment, the mortality rate for extensive burn patients was about 60%. Using the new compresses, the hospital found that only 43 of 92patients with extensive burns died. Use a 1% level of significance to test the claim that the mortality rate has dropped. (a) What is the level of significance? What is the value of the sample test statistic? (Round your answer to two decimal places.)A hospital reported that the normal death rate for patients with extensive burns (more than 40% of skin area) has been significantly reduced by the use of new fluid plasma compresses. Before the new treatment, the mortality rate for extensive burn patients was about 60%. Using the new compresses, the hospital found that only 42 of 89 patients with extensive burns died. Use a 1% level of significance to test the claim that the mortality rate has dropped. (a) What is the level of significance? What is the value of the sample test statistic? (Round your answer to two decimal places.)With the data collected, Dr Tian ran a test to see if there was a significant difference in the mean of X (a factor affecting the continued usage of e-learning communication) between male and female students. Question: Interpret the result and explain whether there is a significant gender difference.
- A survey conducted by a research team was to investigate how the education level, tenure in current employment, and age, are related to annual income. A sample 20 emloyees is selected and the data is given below. 1. Which variable has significant relationship with income at 0.05 level of significance?A child dying from an accidental poisoning is a terrible incident. Is it more likely that male child get into poison than a female child? To find this out, data was collected that showed that out of 1830 children between the ager and four who pass from poisoning, 1031 were males and 799 were females. Do the data show that there are more male children dying of poisoning than female children,Test at the 1% level?A random sample of 400 Spanish adults revealed that 143 were smokers. A random sampleof 300 American adults revealed that 70 were smokers. At the 0.05 level of significance, test the claim that the proportion of Spanish adults that smoke is greater than the proportion of American adults that smoke.
- A team of researchers believe that millennials engage more in positive social media than baby boomers, including more likes, shares, and comments on posts that included positive language. After receiving consent from online participants, the researchers examined their history of Facebook activity and found that of the participants who engaged in at least 10 positive posts a week, 198 were millennials and 212 were baby boomers. Calculate χ 2 (chi-squared) to compare the proportion of millennials engaging in positive social media to the proportion of baby boomers.A psychologist is interested investigating the proportion of depressed teenagers in a particular city. Using a sample of 40 teenagers, 16 were found to exhibit symptoms of depression. At ?=0.01,test the claim that more that 35% of teenagers who live in the city exhibit symptoms of depression.After a sample of n=25 high school students took a special training course, their SAT scores averaged MD= 18 points higher with SS=9600. Based on this sample, can you conclude that the training course is significantly changes SAT scores at the .01 level of significance?