Answer fha following question complete B

[answerhappygod]

Answer fha following question complete

Answer Fha Following Question Complete B 1 (23.08 KiB) Viewed 60 times

B

Answer Fha Following Question Complete B 2 (39.18 KiB) Viewed 60 times

Answer Fha Following Question Complete B 3 (16.03 KiB) Viewed 60 times

7. A confidence interval for estimating the mean An industrial/organizational psychologist wants to improve worker productivity for a client firm, but first she needs to gain a better understanding of the life of the typical white-collar professional. Fortunately, she has access to the 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by WorldOne Research, which surveyed a sample of 650 white-collar professionals (250 legal professionals and 400 other professionals). One of the survey questions was, "During the average workday, how many hours do you spend attending meetings?" For the subsample of legal professionals (n = 250), the mean response was M = 2.0 hours, with a sample standard deviation of s = 3.6 hours. The estimated standard error is SM Use the following Distributions tool to develop a 95% confidence interval estimate of the mean number of hours legal professionals spend attending meetings during a typical workday.

4. Two-tailed hypothesis testing - Step by step S-adenosyl methionine (SAM-e) is a naturally occurring compound in human cells that is thought to have an effect on depression symptoms. Suppose that a researcher is interested in testing SAM-e on patients who are struggling with HIV. He obtains a sample of n = 25 patients and asks each person to take the suggested dosage each day for 4 weeks. At the end of the 4-week period, each individual takes the Beck Depression Inventory (BDI), which is a 21-item, multiple-choice self-report inventory for measuring the severity of depression. The scores from the sample produced a mean of M = 26.3 with a standard deviation of s=1.01. In the general population of HIV patients, the standardized test is known to have a population mean of μ = 27.1. Because there are no previous studies using SAM-e with this population, the researcher doesn't know how it will affect these patients; therefore, he uses a two-tailed single-sample t test to test the hypothesis. From the following, select the correct null and alternative hypotheses for this study: ⒸH: MSAM- 2 27.1; H: MSAM-> 27.1 OH, USAM-e27.1; H,: PSAM-e * 27.1 H: USAM 27.1; H: USAM>27.1 ⒸH, USAM- 2 27.1; H: MSAM- < 27.1 Assume that the depression scores among patients taking SAM-e are normally distributed. You will first need to determine the degrees of freedom. There are 24 degrees of freedom. Use the t distribution table to find the critical region for a = 0.05. The t Distribution:

The critical t scores (the values that define the borders of the critical region) are ±2.797 The estimated standard error is The t statistic is The t statistic Therefore, the researcher in the critical region. Therefore, the null hypothesis rejected. conclude that SAM-e has a significant effect on the moods of HIV patients.