EP BASIC BUS.STATS-ACCESS (18 WEEKS)
14th Edition
ISBN: 9780135989005
Author: BERENSON
Publisher: PEARSON CO
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Textbook Question
Chapter 9, Problem 4PS
If you use a 0.01 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting
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In a hypothesis test with a significance level of a = 0.01, we should reject the null hypothesis if
Question 3 options:
t = 0.005
z = 0.04
p = 0.005
p = 0.04
If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if
ZSTAT=+1.55?
Casey is a statistics student who is conducting a one-sample z‑test for a population proportion p using a significance level of a=. Her null (H0) and alternative (Ha) hypotheses are
H0:p=0.094Ha:p≠0.094
The standardized test statistic is z = 1.40. What is the P-value of the test?
P-value =
Chapter 9 Solutions
EP BASIC BUS.STATS-ACCESS (18 WEEKS)
Ch. 9 - If you use a 0.005 level of significance in a...Ch. 9 - If you use a 0.05 level of significance in a...Ch. 9 - If you use a 0.10 level of significance in a...Ch. 9 - If you use a 0.01 level of significance in a...Ch. 9 - What is your decision in problem 9.4 if...Ch. 9 - What is the p -value if, in a two-tail hypothesis...Ch. 9 - In problem 9.6, what is your statistical decision...Ch. 9 - What is the p-value if, in a two -tail hypothesis...Ch. 9 - In the U.S. legal system, a defendant is presumed...Ch. 9 - Suppose the defendant in Problem 9.9 is presumed...
Ch. 9 - Many consumer groups feel that U.S. Food and Drug...Ch. 9 - As a result of complaints from both students and...Ch. 9 - Do business senior at your school prepare for...Ch. 9 - The quality- control manager at a light emitting...Ch. 9 - Suppose that in problem 9.14, the standard...Ch. 9 - A bottled water distributor wants to determine...Ch. 9 - Suppose that in Problem 9.16, the standard...Ch. 9 - If, In a sample of n=16 selected from a normal...Ch. 9 - In Problem 9.18, how many degrees of freedom does...Ch. 9 - In Problem 9.18, 9.19, what are the Critical...Ch. 9 - In, Problem 9.18, 9.19, and 9.20, what is your...Ch. 9 - If, in a sample of n=16 selected from a...Ch. 9 - If, in a sample of n=160 selected from a...Ch. 9 - You are the manager of a restaurant for a...Ch. 9 - A manufacturer of chocolate candies uses machines...Ch. 9 - A marketing researcher wants to estimate the mean...Ch. 9 - The U.S. Department of Transportation requires...Ch. 9 - The file FastFood contains the amount that a...Ch. 9 - An insurance company has the business objective of...Ch. 9 - The following data (in Drink) represent the amount...Ch. 9 - One of the major measures of the quality of...Ch. 9 - A manufacturing company produces steel housings...Ch. 9 - One operation of a steel mill is to cut pieces of...Ch. 9 - In Problem 3.69 on page 156, you were introduced...Ch. 9 - We Are Social and Hootsuite reported that the...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.36, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.38, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.40, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.42, what is your statistical decision...Ch. 9 - In a one-tail hypothesis test where you reject H0...Ch. 9 - In Problem 9.44, what is your statistical decision...Ch. 9 - The Washington Metropolitan Area Transit Authority...Ch. 9 - CarMD reports that after two years of flat U.S....Ch. 9 - Patient waiting is a common phenomenon the...Ch. 9 - You are the manager of a restaurant that delivers...Ch. 9 - A Survey of nonprofit organization showed that...Ch. 9 - The population mean waiting time to check out of a...Ch. 9 - If, a random sample of 400 items, 88 are...Ch. 9 - In Problem 9.52, if the null hypothesis is that 20...Ch. 9 - In Problem 9.52 and 9.53, suppose you are testing...Ch. 9 - According to a recent National Association of...Ch. 9 - The worldwide market share for the Chrome web...Ch. 9 - One of the issues facing organizations Is...Ch. 9 - What are companies’ biggest obstacles to...Ch. 9 - A cellphone provider has the business objective of...Ch. 9 - Actuation Consulting conducted a global survey of...Ch. 9 - What is the difference between a null hypothesis,...Ch. 9 - What is the difference between a Type I error and...Ch. 9 - What is meant by the power of a test?Ch. 9 - What is the difference between a one -tail test...Ch. 9 - What is meant by a p-value?Ch. 9 - How can a confidence interval estimate for the...Ch. 9 - What is the six-step critical value approach to...Ch. 9 - What is the five-step p-value approach to...Ch. 9 - In hypothesis testing, the common level of...Ch. 9 - Financial institutions utilize prediction models...Ch. 9 - IAB conducted a study of 821 U.S. adults to...Ch. 9 - The owner of a speciality coffee shop wants to...Ch. 9 - An auditor for a government agency was assigned...Ch. 9 - A bank branch located in a commercial district of...Ch. 9 - Call centers today play an important role in...Ch. 9 - An important quality characteristic used by the...Ch. 9 - Studies conducted by the manufacturer of Boston...Ch. 9 - The manufacturer of Boston and Vermont asphalt...Ch. 9 - Referring to the results of problems 9.76 through...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- What is an experiment?arrow_forwardIn a study to test the effectiveness of barbless fishing hooks, 855 fish were caught with this type of hook, the hook was removed, and the fish was released. 26 of the released fish died. Suppose the hypotheses are H0: p = .04 and Ha: p < .04. What is the standardize test statistic (z-score) of the hypothesis test? A. -1.431 B. 0.05 C. 0.0304arrow_forwardIf a hypothesis is rejected at significance level α = 0.01, is it possible that the hypothesis is not rejected if the same test was done at significance level α = 0.05 (with everything else staying the same)?arrow_forward
- Under what circumstances is a t statistic used instead of a z-score for a hypothesis test? Justin wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the mean attention span for students with ADD who are not taking the drug is 2.3 minutes long. His sample of 12 students taking the drug yielded a mean of 4.6 minutes. Justin can find no information regarding σx , so he calculated s2x =1.96. Determine the critical region using a one-tailed test with alpha = .05. Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values). State your conclusions in terms of H0 (Should you reject the H0 or fail to reject/accept the H0). Based on your analysis, is there a relationship between the drug and attention span?arrow_forwardUnder what circumstances is a t statistic used instead of a z-score for a hypothesis test? Justin wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the mean attention span for students with ADD who are not taking the drug is 2.3 minutes long. His sample of 12 students taking the drug yielded a mean of 4.6 minutes. Justin can find no information regarding σx , so he calculated s2x =1.96. Identify the independent and dependent variables. In a sentence, state the null hypothesis being tested. c. Using symbols, state the null and alternative hypothesesarrow_forwardneed part Barrow_forward
- Illustrate the null hypothesis for a correlated t test?arrow_forwardAn RA at the University of Baltimore has concluded that the difference between the mean GPA scores of Senior and junior is statistically significant, when in fact the null hypothesis of no difference is true. What type of error has he committed?arrow_forwardTest the claim that the mean GPA of night students is smaller than the mean GPA of day students at the .01 significance level. The null and alternative hypothesis would be: Ho: LN = HD Ho: pN = PD Ho:PN = PD Ho: UN = 4D Họ:pN = PD Họ: HN = HD Hị: HN > uD H1: PN # PD H1: PN > PD H1: LN + 4D Hị : pN < PD H1: N < HD The test is: right-tailed left-tailed two-tailed The sample consisted of 25 night students, with a sample mean GPA of 2.87 and a standard deviation of 0.03, and 50 day students, with a sample mean GPA of 2.89 and a standard deviation of 0.04. The test statistic is: (to 2 decimals) The critical value is: (to 2 decimals) Based on this we: Reject the null hypothesis O Fail to reject the null hypothesisarrow_forward
- Which of the following is the correct definition of the p-value? P(observed sample statistic | Ho true) O P(Ho true | HA false) P(observed or more extreme sample statistic | Ho true) O P(Ho true | observed sample statistic)arrow_forwardTest the claim that the proportion of people who own cats is significantly different than 90% at the 0.02 significance level. The null and alternative hypothesis would be: Ho : µ = 0.9 Ho: µ = 0.9 Họ:p= 0.9 Họ:p= 0.9 Họ:p= 0.9 Ho: µ = 0.9 H1: µ > 0.9 H1:u + 0.9 H1:p# 0.9 H1:p 0.9 H1: µ Next Question MacBook Pro @ # % & 2 4 6. 7 8. W R T Y S D G J 但 * 00arrow_forwardImagine you are doing a Related-Samples t-test, and you are on Step Four of the hypothesis test. The study you are doing is testing whether there’s a significant difference between the anxiety of people before and after a final exam. The APA sentence is t(35) = 1.87, p > .01. What is the correct set of conclusions that goes with this APA sentence? A. Fail to Reject the H0, conclude that there IS NOT a difference in anxiety. B. Reject the H0, conclude that there IS a difference in anxiety, conclude based on effect size that the difference is small. C. Reject the H0, conclude that there IS a difference in anxiety, conclude based on effect size that the difference is large. D. Fail to Reject the H0, conclude that there IS a difference in anxiety. E. Reject the H0, conclude that there IS NOT a difference in anxiety, conclude based on effect size that the difference is small.arrow_forward
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