Question

What is normal when it comes to people’s body temperatures? A random sample of 130 human body temperatures, had a mean of 98.25 and a standard deviation of 0.73. Does the data indicate that the average body temperature for healthy humans is different from 98.6, the usual average temperature cited by physicians and others?

A) Write the null and alternative hypothesis.

B) What is your conclusion? Support your answer with the appropriate statistics.

Answer 1

Solution :

= 98.6

=98.25

S =0.73

n = 130

a ) This is the two tailed test .

The null and alternative hypothesis is ,

H0 :    = 98.6

Ha :    98.6

b ) Test statistic = t

= ( - ) / S / n

= (98.25 - 98.6) / 0.73 / 130

= -5.466

Test statistic = t = -5.466