onsider the following hypothesis test. Ho 120 H₂ M₁-M20 e following results are from independent samples taken from two populations. Sample 1 7₁ = 35 1 13.6 = 81 = = 5.4 What is the value of the test statistic (to 2 decimals)? Sample 2 n₂ = 40 2 82 = = 10.1 8.1

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What is the standard error for the independent sample t statistic for the two samples?             Sample 1 n = 6, SS = 56             Sample 2 n = 4, SS = 40 Select one: 2.24 9.6 12 5

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CHALLENGE ACTIVITY 7.1.3: Hypothesis test for a population proportion. 413836.2643748.qx3zqy7 Jump to level 1 An airline company is interested in improving customer satisfaction rate from the 54% currently claimed. The company sponsored a survey of 283 customers and found that 168 customers were satisfied. Determine whether sufficient evidence exists that the customer satisfaction rate is higher than the claim by the company. What is the test statistic z? Ex: 1.23 What is the p-value? Ex: 0.456 Does sufficient evidence exist that the customer satisfaction rate is different than the claim by the company at a significance level of a = 0.1? [Select Check Next 2 3 0

(see attachment) Use technology to conduct a one-factor ANOVA to determine if the group means are equal using α=0.05α=0.05. Group means (report to 2 decimal places): Group 1: Internship:   Group 2: Co-op:   Group 3: Work Study:   ANOVA summary statistics:F-ratio =     (report accurate to 3 decimal places)p=p=     (report accurate to 4 decimal places)

fror TIME SUBJECT ROOM AVONOW 1 INSTRUC You may need to use the appropriate appendix table or technology to answer this question. Consider the hypothesis test. Ho: P₁ P₂ ≤0 Ha: P₁ P₂ > 0 The following results are for independent samples taken from the two populations. Sample 2 A VENEMAAL 7₂ = 300 Sample n₁ = 200 P₁ = 0.24 P₂ = 0.14 (a) Calculate the test statistic. (Round your answer to two decimal places.) 2.86 You may have rounded in the wrong direction. AVAN XVԺՎՈԼԵՏ

K ● ● Part 2 of 4 OC. Ho: μ> 13 µg/g H₁:μ13 μg/g Listed below are the lead concentrations in µg/g measured in different traditional medicines. Use a 0.05 significance level to test the claim that the mean lead concentration for all such medicines is less than 13 µg/g. Assume that the sample is a simple random sample. 3 16.5 3 19.5 5 6 22.5 19.5 2.5 9.5 Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? A. Ho: p=13 μg/g H₁:μ13 μg/g Determine the test statistic. (Round to two decimal places as needed.) iew an example Get more help points x Points: 0 of 1 (en OB. Ho: P=13 µg/g H₁:μ 13 µg/g D. Ho: μ-13 µg/g H₁: μ> 13 μg/g tv Clear all Save MA Check answer W rect:

Men      Women μ     μ1          μ2 n     11          59 x     97.72     97.34 s     0.83       0.63 A study was done on the body temperatures of men and women. The results are shown in the table. 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  0.05 significance level to test the claim that men have a higher mean body temperature than women. a. What are the null and alternative hypotheses? The test​ statistic, t, is The​ P-value is   State the conclusion for the test. b. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.

Drug Trial ProblemClinical trials for a drug was conducted using a treatment group and a placebo group.  The results are shown in the table below.   Treatment Placebo μ μ₁ μ₂ n 33 38 x̄ 2.31 2.87 s 0.85 0.71 Use a 0.05 significance level to test the claim that the two samples are from populations with different means. State the claim, null, and alternative hypothesis. Claim: μ1              μ2 HO: μ1                    μ2 H1: μ1             μ2