8

Claim: The standard deviation of pulse rates of adult males is lessthan 11 bpm. For a random sample of 138 adultmales, the pulse rates have a standard deviation of 9.8 bpm. Complete parts(a) and(b) below.

a. Express the original claim in symbolic form.

sigma

mu

p

p

less than

<

not equals

greater than

>

equals

=

nothing

bpm

(an integer or a decimal. Do notround.)

b. Identify the null and alternative hypotheses.

H0:

p

p

mu

sigma

equals

=

greater than

>

less than

<

not equals

bpm

H1:

mu

p

p

sigma

greater than

>

equals

=

less than

<

not equals

bpm

(integers or decimals. Do notround.)