The test statistic of z=2.12 is obtained when testing the claim that p > 0.3. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of a = 0.10, should we reject Ho or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. This is a test.
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- Do men score higher on average compared to women on their statistics finals? Final exam scores of twelve randomly selected male statistics students and ten randomly selected female statistics students are shown below. Male: 65 94 63 85 84 72 79 80 95 79 75 84 Female: 54 60 81 72 65 66 61 77 64 77 Assume both follow a Normal distribution. What can be concluded at the the a = 0.01 level of significance level of significance? For this study, we should use t-test for the difference between two independent population means a. The null and alternative hypotheses would be: Ho: μ1 + = + μ2 + (please enter a decimal) H₁: μ1 + μ2 ◆ (Please enter a decimal) b. The test statistic t = 3.125 x (please show your answer to 3 decimal places.) c. The p-value .0028 x (Please show your answer to 4 decimal places.) d. The p-value is ≤ α e. Based on this, we should reject + the null hypothesis. f. Thus, the final conclusion is that The results are statistically insignificant at a = 0.01, so there is…Suppose that a random sample of 128 graduate-admissions personnel was asked what role scores on standardized tests play in consideration of a candidate for graduate school. Of these sample members, 70 answered "very important." Find a 95% confidence interval for the population proportion of graduate admissions personnel with this view. Click the icon to view the standard normal distribution table. The 95% confidence interval is from to (Round to four decimal places as needed.) ...According to a Yankelovich poll, women spend an average of 19.1 hours shopping during the month of December, compared to 12.7 hours for men. Assuming that file XR11027 contains the survey data underlying these results, use the 0.01 level in examining whether the sample mean for women is significantly higher than that for men. Identify and interpret the p-value for the test (Assume unequal variances). women men 13.9 11.9 27.6 15.9 11.6 17.9 21.0 12.6 20.9 12.1 20.3 10.5 9.7 11.9 15.6 16.5 22.5 11.2 26.4 5.3 17.0 14.4 23.2 16.3 13.1 10.8 22.1 10.5 21.6
- Do men score lower on average compared to women on their statistics finals? Final exam scores of thirteen randomly selected male statistics students and thirteen randomly selected female statistics students are shown below. Male: 66 89 59 69 91 84 86 73 91 87 91 77 89 Female: 79 88 99 78 86 83 87 99 94 77 92 95 73 Assume both follow a Normal distribution. What can be concluded at the the αα = 0.10 level of significance level of significance? For this study, we should use Select an answer t-test for the difference between two independent population means t-test for the difference between two dependent population means z-test for the difference between two population proportions t-test for a population mean z-test for a population proportion The null and alternative hypotheses would be: H0:H0: Select an answer p1 μ1 Select an answer > ≠ < = Select an answer p2 μ2 (please…Suppose that a simple random sample is taken from a normal population having a standard deviation of 15 for the purpose of obtaining a 95% confidence interval for the mean of the population. Complete parts (a) through (c) below. Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. a. If the sample size is 9, obtain the margin of error. The margin of error for a sample size of 9 is (Round to two decimal places as needed.) 0. b. Repeat part (a) for a sample size of 36. The margin of error for a sample size of 36 is. (Round to two decimal places as needed.) c. Can you guess the margin of error for a sample size of 144? Explain your reasoning. The margin of error for a sample size of 144 is (Round to two decimal places as needed.) Explain your reasoning. Because the sample size by a factor of from part (h) to part (c) the margin of error was Time Remaining: 01:03:51 NextThe following random sample was selected from a normal distribution: 4, 6, 3, 5, 9, 3. f. Use p-Value to test the null hypothesis that the mean of the population is 6 against the alternative hypothesis, ? ≠6. Use ? = .05.
- Do the poor spend less time in the shower than the rich? The results of a survey asking poor and rich people how many minutes they spend in the shower are shown below. Poor 23 27 38 39 24 29 17 32 31 38 14 25 33 36 38 50 25 Assume both follow a Normal distribution. What can be concluded at the the a= 0.10 level of significance level of significance? For this study, we should use Select an answer Rich: 33 14 24 29 a. The null and alternative hypotheses would be: Ho: Select an answer H₁: Select an answer b. The test statistic ? Select an answer Select an answer = myopenmath.com@ Select an answer Select an answer (please enter a decimal) (Please enter a decimal) O (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) c. The p-value = d. The p-value is να e. Based on this, we should Select an answer the null hypothesis. f. Thus, the final conclusion is that ... The results are statistically significant at a = 0.10, so there is sufficient evidence to…Is memory ability before a meal the same as after a meal? Ten people were given memory tests before their meal and then again after their meal. The data is shown below. A higher score indicates a better memory ability. Ho: Select an answer H₁: Select an answer ✓ Before a Meal After a Meal Assume a Normal distribution. What can be concluded at the the a = 0.01 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: b. The test statistic ? ✓ = Score on the Memory Test 67 44 71 77 63 76 53 50 71 82 76 54 71 86 75 88 58 49 89 83 Select an answer Select an answer V c. The p-value d. The p-value is ? ✓ a e. Based on this, we should f. Thus, the final conclusion is that ... Select an answer Select an answer (please enter a decimal) (Please enter a decimal) (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) Select an answer the null hypothesis.Test the indicated claim about the means of two populations. Assume that the two samples are randomly selected, independent, the population standard deviations are not know and not considered equal. Subjects are given a creativity exercise on a computer with either a red background or a blue background. The scores are shown in the table. At the 0.01 significance level, test the claim that blue enhances performance on a creative task. Red Background Blue Background n1 = 41 n2 = 44 xˉx̄1 = 19.2 xˉx̄2 = 18.7 s1 = 0.88 s2 = 0.35 What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)H0: Select an answer μ(blue) s₁² μ₂ p₂ p̂₁ σ₁² p μ₁ x̄₂ μ x̄₁ p₁ ? < ≥ ≠ ≤ = > Select an answer p₁ μ s₁² σ₁² μ₂ p₂ x̄₁ p̂₁ μ(red) μ₁ p x̄₂ H1: Select an answer x̄₁ x̄₂ p₁ μ₁ μ μ(blue) p p₂ σ₂² s₂² p̂₂ μ₂ ? ≤ < = ≥ ≠ > Select an answer σ₁² x̄₂ p₁ x̄₁ μ₁ p p₂ μ μ₂ p̂₁ s₁² μ(red) Original Claim = Select an answer H₁ H₀ df = Based on…
- Given in the table are the BMI statistics for random samples of men and women. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. a. Test the claim that males and females have the same mean body mass index (BMI). What are the null and alternative hypotheses? OA. Ho: H=H H₁: Hy > H₂ ỌC. Ho: H=H2 H₁: H₁ H₂ The test statistic, t, is. (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State the conclusion for the test. -C OB. Ho: ₁2/₂ H₁ H₁ H₂ OD. Ho. Hy#t H₁: H₁ H₂ O A. Fail to reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. O B. Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that men and women…Use the pulse rates in beats per minute (bpm) of a random sample of adult females listed in the data set available below to test the claim that the mean is less than 69bpm. Use a 0.05 significance level. Determine the p-value, test statistic, and whether to reject or support the null hypothesis. Pulse Rates (bpm)4758945542428462993656838640967652866179101964387103596043524566974010140833853398649613552933856446594Which of the following is not a requirement for one-way ANOVA? ... A. The populations are approximately normally distributed B. The samples are independent of each other C. The populations have the same variance D. none of the other answers E. The populations have the same mean O F. The sample sizes from each population are the same