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5. O 2116 points l Bone mineral densities (mg/cm2) were measured on a sample of n-9 women (age 45 to 65) with low bone mineral densities (BMD) who had been randomly selected and assigned to a treatment group that took the drug conjugated equine estrogen (CEE) for 3 years. CEE is used as a treatment for low bone density and investigators wanted to examine its effectiveness. The responses, rounded to the nearest integer, are reported in Table 1. Table 1: 1375 1397 1378 1375 1376 13841395 1369 1391 Mineral Den for women between 45- 65 years old Assuming that this sample is the hypothesis that, on average, women on CEE therapy will have density levels that are greater than 1375. Let a 0.025 of women in this age group with low bone density, research clinicians would like to test A) The variable (type and level) of interest in this study is: O Quantitative & Nominal O Qualitative & Continuous O Qualitative & Ordinal Qualitative & Nominal Quantitative & Ordinal Qualitative & Discrete Quatitative & Continuous Quantitative & Discrete

Answer 1

sample info:

The provided sample mean is sample size isn 9 - 1382.22 and the sample standard deviation is s 9.98, and the The following null and alternative hypotheses need to be tested: Ho: μ = 1375 Ha: u> 1375 This corresponds to a right-tailed test, for which a t-test for one mean, with unknown population standard deviation will be used (2) Rejection Region Based on the information provided, the significance level is α-0.025, and the Critical value for a right- tailed test is te 2.306 The rejection region for this right-tailed test is R-t:t> 2.306 The t-statistic is computed as follows: X - Lu1382.22 - 1375 s/v n = 9.98/V9