A study of the number of business lunches that exec-utives in the insurance and banking industries claim as deductible expenses per month was based on randomsamples and yielded the following results:n1 = 40 x1 = 9.1 s1 = 1.9n2 = 50 x2 = 8.0 s2 = 2.1 Use the four steps in the initial part of Section 1 and the0.05 level of significance to test the null hypothesis μ1 −μ2 = 0 against the alternative hypothesis μ1 − μ2 Z 0.

Q: In a study to test the effectiveness of barbless fishing hooks, 855 fish were caught with this type…

A: Here a from the left tailed hypothesis test for testing the effectiveness of barbless fishing, we…

Q: If you use a 0.05 level of significance in a​ two-tail hypothesis​ test, what decision will you make…

A:

Q: A newsletter publisher believes that less than 50% of their readers own a laptop. For marketing…

A: Null Hypothesis: H0: p = 0.49 Alternative Hypothesis: Ha: p < 0.49 The decision is  to reject the…

Q: The critical z-value for an 85% two tailed hypothesis test is  a. 0.8023 b. 1.44 c. 1.04 d.…

A: For two tailed test we  use critical z value at α2  Since here α=15% Therefore here  we  calculate…

Q: One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from…

A: Givensample size(n)=1050x=95significance level(α)=0.05

Q: A newsletter publisher believes that 25%of their readers own a personal computer. Is there…

A: Given that  A newsletter publisher believes that 25%of their readers own a personal computer. Level…

Q: The mean number of sick days per employee taken last year by all employees of a large city was 10.6…

A: From question we can say that, Null Hypothesis: H0: u=10.6 Alternative Hypothesis Ha: u≠10.6

Q: In a home improvement company, all male employees with 3 to 5 years of experience have an average…

A: A) The appropriate test is obtained below: It is given that, n= 26 and µ = 27,200. Also, M= 28,100.…

Q: A researcher randomly sampled 30 graduates of an MBA program and recorded data about their starting…

A:

Q: For a two tailed test using z value at the .05 % significance level, we reject null hypothesis if Z…

A: Given information: Level of significance = 0.05 The test is two tailed. The test is z test.

Q: The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day.…

A: Given that, Mean, x bar= 12.2 Sample size, n=115 And standard deviation, sigma= 6.93 Here we've to…

Q: Denise runs a dependent samples t-test and calculates r2subjects=.46 and r2condition=.23. b) If…

A: rSubjects2=0.46rCondition2=0.23SSTotal=100

Q: Scores on an IQ test are normally distributed. A sample of 25 IQ scores had variance s² = 64. The…

A: A random sample of 25 IQ scores from a normal distribution has variance s2=64. Calculation: Here the…

Q: In one state, the mean time served in prison by convicted burglars is 18.7 months. A researcher…

A:

Q: Suppose that in a certain year, it was reported that the variance in GMAT scores was 14,650. At a…

A: (a)   Determine the value of sample mean, variance and standard deviation   Use EXCEL Procedure to…

Q: What can conclude about the null hypothesis from this dataset of weight gain in mice grouped by…

A: The given data can be written in the form of a two-way table as follows   Diet   Stress A B C…

Q: A study is conducted to determine whether there is a difference in the mean scores of Collin County…

A: Given Information: A study is conducted to determine whether there is a difference in the mean…

Q: Test the claim that the proportion of men who own cats is larger than 20% at the .005 significance…

A: Denote p as the true proportion of men who own cats.

Q: A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly…

A: The random variable X is normally distributed. The population mean is 402 grams. We have to state…

Q: A car leasing firm's records indicate that the mean number of miles driven annually in its cars has…

A: GivenA car leasing firm's records indicate that the mean number of miles driven annually in its cars…

Q: 6.16 Is college worth it? Part I. Among a simple random sample of 331 American adults who do not…

A: sample size, n = 331 American adults Point estimate : p^ = 0.48   a) Minority of students means…

Q: A researcher is using a one-tailed hypothesis test with α = .01 to evaluate the effect of a…

A:

Q: A teacher is interested in assessing whether or not there is the same amount of variance in the…

A: Given, A sample of 15 boys had variance 460 A sample of 13 girls had variance 1400

Q: A comparison of reaction times (in seconds) for two different stimuli in a psychological word-…

A: The 95% confidence interval for the difference in mean reaction times for the two stimuli will…

Q: An RA at the University of Baltimore has concluded that the difference between the mean GPA scores…

A: Type 1 error : - We we reject the true Null Hypothesis Type 2 error : - When we accept the false…

Q: est the claim that the proportion of men who own cats is larger than 25% at the .005 significance…

A:

Q: null and alternative hypothesis would be

A: Here , we want to test the claim that the proportion of men who own cats is significantly different…

Q: Very large random samples of Catholics, Protestants, and people with no religious affiliation have…

A: Introduction: Statistical significance and practical significance are not one and the same thing.…

Q: A diet doctor claims that the average North American is more than 20 pounds overweight. To test this…

A: From the provided information, Sample size (n) = 20 Sample mean (x̄) = 21.2 Sample standard…

Q: A random sample of 100 soldiers indicates that 20% are married in year 1, while 30% are married in…

A: Given  n1=100n2=100p1^=20%=20100=0.2p2^=30% =30100=0.3

Q: Annie is concerned over a report that "a woman over age 4040 has a better chance of being killed by…

A: It is given that n=516 and x=21.

Q: For a two-tailed test with a sample size of 40, the null hypothesis will not be rejected at a 5%…

A:

Q: Mick, a golfer, has a sample driving distance mean of 252.0 yards from 15 drives. He still claims…

A: Decision based on p-value:At level of significance α, if the p-value ≤ α, then reject the null…

Q: Test the claim that the proportion of men who own cats is significantly different than 35% at the…

A: Givenn=55x=255p^=xn=25555=4.6364p=0.35significance level(α)=0.2

Q: For a random sample of 10 households, the sample correlation coefficient, r between disposable…

A: We have  to find test statistic ..

Q: A sample of 150 homes for sale in ABC City showed a mean asking price of $233,000, but the city…

A: Given, Sample size = 150 Sample mean = 233000 Population standard deviation = 11000   Under the…

Q: Test the claim that the proportion of people who own cats is significantly different than 80% at the…

A: State the hypotheses.   Correct option: Option 2   Determine the tail of the test. The tail of the…

Q: A 2011 survey, by the Bureau of Labor Statistics, reported that 91% of Americans have paid leave. In…

A: The hypothesis tested were "the proportion of people who have paid leave has decreased" vs " the…