Hypothesis

Claim: The standard deviation of pulse rates of adult males is less than 10 bpm. For a random sample of 132 adult​ males, the pulse rates have a standard deviation of 9.7 bpm. Complete parts​ (a) and​ (b) below.

a. Express the original claim in symbolic form.

σ <10 bpm​

(Type an integer or a decimal. Do not​ round.)

b. Identify the null and alternative hypotheses.

H0​: σ =10 bpm

H1​: σ <10 bpm​

(Type integers or decimals. Do not​ round.)