Question

Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly is 115 millimeters of mercury (mmHg), but she believes that the actual value is higher. She bases her belief on a recently reported study of 22 randomly selected, elderly adults. The sample mean systolic blood pressure of the adults in the study was 120 mmHg, and the sample standard deviation was 25 mmHg. Assume that the population of systolic blood pressures of elderly adults is normally distributed. Based on the study, at the 0.05 level of significance, can it be concluded that u, the mean systolic blood pressure among elderly adults, is greater than 115 mmHg? Perform a one-tailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. I o P The null hypothesis: H 0 The alternative hypothesis: H O=O OSO DO The type of test statistic: (Choose one) D# <O O> The value of the test statistic: (Round to at least three decimal places.) 0 x 5 ? O The critical value at the 0.05 level of significance (Round to at least three decimal places.) Can it be concluded, at the 0.05 level of significance, that the mean systolic blood pressure among elderly adults is greater than 115 mmHg? Yes No

Answer 1

Data ريم A 5 ) 5 بل : د لما د ان لا بد I slatis tie text type of 15 أ- ہ 9 | الإ= * و وز 25 ولك 38 و 00 + به او عيله لتلو لي او دا % و 09 و 93 و 2 او دا NO CS Scanned with CamScanner