1. It is widely believed that the average body temperature for healthy adults is 98.5 degrees Fahrenheit. A study was conducted a few years ago to examine this belief. The body temperatures of n = 20 healthy adults were measured (half male and half female). The average temperature from the sample was found to be x = 97.9 with a standard deviation s = 0.73. Do these statistics provide evidence that the average body temperature for healthy adults is less than 98.5? Test at 5% level of significance.

i) Write down the hypothesis

(Guide:

-Write H0 as H0("H" and zero), H1 as H1, and as the small letter "u".

-Separate the null hypothesis and the alternative hypothesis using "vs" and include a space between them. .

-If your answer includes "not equal to" type "=/" (equal and front-slash keys), and if not, simply type the inequality.

E.g. H0: u=p vs H1: u=/p OR H0: u=q vs H1: u

ii)Specify the type of test

iii) What are the degrees of freedom?

iii) Give the critical value

iv) Give the test statistic.

(2 decimal points)

v.) Give the decision

vi)What can be concluded from the test?

A.The sample statistics provide sufficient evidence that the average body temperature for an adult is approximately 98.5 degrees Fahrenheit

B.There is sufficient evidence to show that the average body temperature for healthy adults is not less than 98.5 degrees Fahrenheit

C.The statistic provided by the sample is sufficient to explain the population

D.There is no sufficient evidence to show that the average temperature is 98.5 degrees Fahrenheit