answer me this! 1.

It is generally agreed that a certain standard treatment yields a mean survival period of

4.2 years for cancer patient. A new treatment

is administered to 60 patients and their

duration of survival is recorded. The sample mean and standard deviation of the duration

is 4.5 years and 0.8 years, respectively.

a) Set up the null and alternative hypotheses

to test whether the new treatment

in

creases

the mean survival period.

0

H

:

a

H

:

b) The standardized test statistic is

c) The rejection region at

01

.

0

is

d) Make the conclusion