A 20-minute consumer survey mailed to 500 adults aged 25-34 included a $5 Starbucks gift certificate. The same survey was mailed to 500 adults aged 25-34 without the gift certificate. There were 73 responses from the first group and 42 from the second group.
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A 20-minute consumer survey mailed to 500 adults aged 25-34 included a $5 Starbucks gift certificate. The same survey was mailed to 500 adults aged 25-34 without the gift certificate. There were 73 responses from the first group and 42 from the second group.
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- Given the df, confidence level, and t score, what is your decision about the null hypothesis? a) df = 21, 95% confidence level, 2-tailed test Critical t value: If t = 2.32, can you reject the null hypothesis (yes or no)? b) df = 18, 95% confidence level, 1-tailed test Critical t value: If t = 2.00, can you reject the null hypothesis (yes or no)? c) df = 24, 99% confidence level, 2-tailed test Critical t value: If t = 1.21, can you reject the null hypothesis (yes or no)? d) df = 11, 99% confidence level, 1-tailed test Critical t value: If t = 3.15, can you reject the null hypothesis (yes or no)? e) df = 23, 90% confidence level, 2-tailed test Critical t value: If t = 1.34, can you reject the null hypothesis (yes or no)?The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day. An article reports the following summary data on intake for a sample of males age 65−74 years: n = 116, x = 12.5, and s = 6.35. Does this data indicate that average daily zinc intake in the population of all males age 65−74 falls below the recommended allowance? (Use ? = 0.05.)State the appropriate null and alternative hypotheses. H0: ? = 15Ha: ? ≠ 15H0: ? = 15Ha: ? > 15 H0: ? = 15Ha: ? ≤ 15H0: ? = 15Ha: ? < 15 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. Do not reject the null hypothesis. There is not sufficient evidence that average daily zinc intake falls below 15 mg/day.Reject the null hypothesis. There is not sufficient evidence that average daily zinc intake falls below 15 mg/day. Do not reject…If a researcher's statistical test supports the conclusion that their manipulation did not improve worker morale, what is the likelihood the researcher made the wrong decision if power is set to 0.70? a) 70% b) 30% c) 35% d) cannot determine with the information provided
- In the picture there is a given data and based from that data. There is no significant difference between the perceived level of riskiness of thrill behavior in males and in females. (Use a= 0.05) Identify the Null hypothesis and Alternative HypothesisThe recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day. An article reports the following summary data on intake for a sample of males age 65−74 years: n = 111, x = 12.4, and s = 6.69. Does this data indicate that average daily zinc intake in the population of all males age 65−74 falls below the recommended allowance? (Use ? = 0.05.)State the appropriate null and alternative hypotheses. H0: ? = 15Ha: ? > 15H0: ? = 15Ha: ? < 15 H0: ? = 15Ha: ? ≤ 15H0: ? = 15Ha: ? ≠ 15 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = State the conclusion in the problem context. Do not reject the null hypothesis. There is sufficient evidence that average daily zinc intake falls below 15 mg/day.Reject the null hypothesis. There is sufficient evidence that average daily zinc intake falls below 15 mg/day. Do not reject the null…Annie, a pharmacist, claims that a generic anti-histamine dose is more than 18 mg, on average. Several of her coworker do not believe her, so she decides to do a hypothesis test, at a 10% significance level, to persuade them. She measures 18 pills, collects the proper data, and works through the testing procedure: H0: μ≤18; Ha: μ>18 x¯=19.1 σ=1.6 α=0.1 (significance level) The test statistic is =2.92 The critical value is z0.1=1.28 Conclude whether to reject or not reject H0, and interpret the results. Reject H0. At the 10% significance level, the test results are not statistically significant and at best, provide weak evidence against the null hypothesis. Reject H0. At the 10% significance level, the data provide sufficient evidence to conclude that the mean dosage is more than 18 mg. Do not reject H0. At the 10% significance level, the test results are not statistically significant and at best, provide weak evidence against the null hypothesis. Do not reject H0. At…
- The proportion of mango trees on an island that produce only dwarf fruit is p1. The proportion of mango trees on a different island that produce only dwarf fruit is p2. What is the null hypothesis for a test to determine if the proportions are different between the two islands? Select the correct answer below: H0: p1−p2≠0 H0: p1−p2=0 H0: p1−p2>0 H0: p1−p2<0The vice-president of administration wonders whether employees are taking adequate amounts of vacation time. Employee burnout is a concern. Research suggests that an employee taking less than 1.4 weeks of vacation annually is very likely to experience burnout. Analyze the employee vacation data and conduct a hypothesis test with the following results: t = 2.93p = 0.0084 What reasons should the vice-president provide to the president to justify the recommendation on employee burnout? Based on the data, is the presence of employee burnout an issue that may negatively impact the company?We ask a random sample of 1000 New Zealanders their opinion on whether New Zealand should become a republic with a president replacing the Queen as head of state and 350 answer ‘yes’. We are testing the following pair of hypotheses for the value of p, the true proportion of New Zealanders who think that New Zealand should become a republic with a president replacing the Queen as head of state: H0: p = 0.40 Ha: p > 0.40 Select the correct value (to 3 decimal places) of the z-test statistic for this sample from the list below. Select one: a.3.315 b.-3.227 c.-3.315 d.3.227
- Formulate the null and alternative hypothesis and identify the type of test. Tge manufacturer if a certain brand of cigarettes claims that the average nicotine cpntent does not exceed 2.5 mg. State the Ho and H1 in testing and determine what type of test to be utikized.A researcher who wants to know whether the proportion of male births in a hospital is different from the established baseline of 51.07%, would like to test the following hypotheses: Ho:P = 0.51 vs. Ha :P = does not equal 0.51 a) Is the alternative hypothesis upper tail, lower tail, or two tailed? b) What do you conclude if the test results p-value of 0.03 at alpha value = 5% c) What do you conclude if the test results p-value of 0.08 at alpha value = 10%