Essential Statistics for the Behavioral Sciences
2nd Edition
ISBN: 9781506386300
Author: Gregory J. Privitera
Publisher: SAGE Publications, Inc
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Chapter 10, Problem 19CAP
(a)
To determine
To test whether or not her tutoring is effective at a
(b)
To determine
To compute effect size using estimated Cohen’s d .
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According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, 23% of all complaints in 2007 were for identity theft. In that year, Alaska had 321 complaints of identity theft out of 1,432 consumer complaints ("Consumer fraud and," 2008). Does this data provide enough evidence to show that Alaska had a lower proportion of identity theft than 23%? Test at the 5% level.
viii) Comparing p-value and α value, which is the correct decision to make for this hypothesis test?
A. Reject H
B. Fail to reject Ho
C. Accept Ho
D. Accept HA
Enter letter corresponding to correct answer.
(ix) Select the statement that most correctly interprets the result of this test:
A. The result is statistically significant at .05 level of significance. Evidence supports the claim that the proportion of complaints due to identity theft in Alaska is less than 23%.
B. The result is statistically significant at .05 level of significance. There is not…
In the previous year, 40% of women over the age of fifty had regularly scheduled mammograms. Following last year's test, a campaign was initiated to encourage women to be tested regularly. This year, a cancer research group surveys a random sample of 450 women, and 195 respond affirmatively. With a 5% significance level, test to see if the campaign was effective.
What is the null hypothesis?
options:
H0: μ ≤ 0.4
H0: μ ≥ 0.4
H0: p ≠ 0.4
H0: p ≥ 0.4
H0: p ≤ 0.4
H0: μ ≠ 0.4
None of these.
Back in April and May of 1985, the Gallup organization conducted a poll to estimate the percentage of Americans who approved of how President Reagan was handling his job. At the 5% significance level, do the data suggest that the percentage of those who approved of Reagan increased from April to May in 1985? Population 1: April p = 795/1528 = 0.5203 Population 2: May p = 840/1528 = 0.5497
Show all your steps, setting up your null and alternative hypothesis.
Chapter 10 Solutions
Essential Statistics for the Behavioral Sciences
Ch. 10 - Prob. 1FPCh. 10 - Prob. 2FPCh. 10 - Prob. 3FPCh. 10 - Prob. 4FPCh. 10 - Prob. 5FPCh. 10 - Prob. 6FPCh. 10 - Prob. 7FPCh. 10 - Prob. 8FPCh. 10 - Prob. 9FPCh. 10 - Prob. 10FP
Ch. 10 - Prob. 11FPCh. 10 - Prob. 12FPCh. 10 - Prob. 13CAPCh. 10 - Prob. 14CAPCh. 10 - Prob. 15CAPCh. 10 - Prob. 16CAPCh. 10 - Prob. 17CAPCh. 10 - Prob. 18CAPCh. 10 - Prob. 19CAPCh. 10 - Prob. 20CAPCh. 10 - Prob. 21CAPCh. 10 - Prob. 22CAPCh. 10 - Prob. 23CAPCh. 10 - Prob. 24CAPCh. 10 - Prob. 25CAPCh. 10 - Prob. 26CAPCh. 10 - Prob. 27CAPCh. 10 - Prob. 28CAPCh. 10 - Prob. 29PRCh. 10 - Prob. 30PRCh. 10 - Prob. 31PRCh. 10 - Prob. 32PRCh. 10 - Prob. 33PRCh. 10 - Prob. 34PR
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- Back in April and May of 1985, the Gallup organization conducted a poll to estimate the percentage of Americans who approved of how President Reagan was handling his job. At the 5% significance level, do the data suggest that the percentage of those who approved of Reagan increased from April to May in 1985? Population 1: April p = 795/1528 = 0.5203Population 2: May p = 840/1528 = 0.5497Show all your steps, setting up your null and alternative hypothesis.arrow_forwardWhen asked what it means for the result of a hypothesis test to be practically significant (or practically important), Tatum says this means that the P-value is small and the null hypothesis has been rejected. Why is Tatum wrong?arrow_forwardUse the method of hypothesis testing to determine if Ryan should conclude his saplings are growing. Take a 5% significance level.arrow_forward
- If the p-value of a hypothesis test is equal to 0.035, then the null hypothesis will be rejected for which cases? SELECT ALL THAT APPLY. a. for a significance level of 0.01 b. for a significance level of 0.10 c. for a significance level of 0.05 d. for a significance level of 0.02arrow_forwardFor the x and observed significance level (P-Value) pair, indicate whether the bull hypothesis would be rejected.arrow_forwardIn follow up to my last test, I believe there are more females that use iPhones then males. In a study of ten males and ten females, see the data below: 5 out of 10 males surveyed use an iPhone. 7 out of 10 females surveyed use an iPhone. What is the null hypothesis and proposed hypothesis? Should we reject the null hypothesis at a .01 significance level and why? Is the proposed hypothesis acceptable based on evidence presented?arrow_forward
- When asked what it means for the result of a hypothesis test to be practically significant (or practically important), Tatum says this means that the P-value is small and the null hypothesis has been rejected. what is wrong about this?arrow_forwardHistorically, the percentage of U.S. residents who support stricter gun control laws has been 55%. A recent Gallup Poll of 2500 people showed 1723 in favor of stricter gun control laws . Assume the poll was given to a random sample of people. QUESTION Test the claim that the proportion of those favoring stricter gun control has changed from 0.55. Perform a hypothesis test, using a significance level of 0.01. What are the hypotheses? Null: p=0.55 Alternate: p=0.55 Null: p=0.55 Alternate: p0.55 Null: p=0.55 Alternate: p ≠ 0.55arrow_forwardA professor at a large university believes that students take an average of 15 credit hours per term. A random sample of 22 students in her class of 250 students reported the following number of credit hours that they were taking: 12 12 12 13 13 14 14 14 14 15 15 15 16 16 16 16 16 17 17 18 19 21 Does this sample indicate that students are taking more credit hours than the professor believes? Test an appropriate hypothesis and state your conclusion at 5% significance level. Which method will you use to perform the test? Choose the correct one. a1-sample T test b2-sample T test c-sample Z test d-sample T teste- e1proportion Z test.arrow_forward
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