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- Does having a non-significant P-value means that the means of the sample will be the same? explainIn a randomized block ANOVA, identify the statistic that is used as a measure of variationa. among the sample means for the treatments.b. among the sample means for the blocks.c. within the samples for the treatments with the variation due to blocks removed.Does the sample size ? affect the standard deviation of all possible samplemeans? Explain your answer.
- Stress at work: In a poll about work, 41% of respondents said that their jobs were sometimes or always stressful. Thirteen workers are chosen at random. Part 1 of 2 (a) What is the mean number who find their jobs stressful in a sample of 13 workers? Round the answer to two decimal places. The mean number who find their jobs stressful is Part 2 of 2 (b) What is the standard deviation of the number who find their jobs stressful in a sample of 13 workers? Round the answer to four decimal places. The standard deviation of the number who find their jobs stressful isName the sampling distribution of the F-test statisitc?When using an Analysis of Variance test, in order to find out which specific means are different from one another which test is used? a. t-test b. post hoc test c. Cohen’s D test d. Chi-square test
- Is this distribution of "Day of the Month Born" for this statistics class approximately Normal? Justify your answer using the 68-95-99.7 rule.A union of restaurant and foodservice workers would like to estimate the mean hourly wage, u, of foodservice workers in the U.S. this year The mean hourly wage last year was $8.16, and there is good reason to believe that this year's value is greater than last year's. The union decides to do a statistical test to see if the value has indeed increased. The union chooses a random sample of this year's wages, computes the mean of the sample to be $8.43, and computes the standard deviation of the sample to be $1.25. Based on this information, complete the parts below. (a) What are the null hypothesis H, and the alternative hypothesis H, that should be used for the test? H, :0 OSO H :0 D=0 (b) Suppose that the union decides not to reject the null hypothesis. What sort of error might it be making? (Choose one) (c) Suppose the true mean hourly wage for foodservice workers in the U.S. this year is $8.16. Fill in the blanks to describe a Type I error. A Type I error would be the hypothesis that…At a 0.05, test to see if the population variances from which the following samples were drawn are equal. The test statistic is Group 1 n₁ = 21 Group 2 n₂ = 19 $1 = 20 S2 = 18 (A) 1.56 (B) 1.23 (C) 1.26 (D) 1.11