A random sample of 436 mothers in the United States found that their average age at first birth was 25.9 with a standard deviation of 4.5. A random sample of 364 mothers in France found that their average age at first birth was 28.6 with a standard deviation of 9.5. We will be testing if the mothers give birth to their first birth in the United States are at younger ages than those in France. Required:
Calculate the degrees of freedom for this hypothesis test.

Degree of freedom = 798

Step-by-step explanation:

Given that,

First random sample, n₁ = 436

Second random sample, n₂ = 364

So,

Degree of freedom = n₁ + n₂ - 2

                                = 436 + 364 - 2

                                = 798

⇒Degree of freedom = 798

associative property of multiplication

stew reads at the fastest rate of 265 words per minute.

step-by-step explanation:

it's a given that felicia reads at 260 word per minute and on connie's graph we can see that she reads 200 words per minute. since stew's table tells us that he read 795 in 3 minutes, we can divide 795 by 3 to find out how many words he reads per minute.

795/3 = 265

stew reads 265 words per minute - he reads at the fastest rate since felecia reads at 260 words per minute and connie reads at 200 words per minute.

stew (265) > felecia (260) > connie (200)