A company offers all its employees a physical each year. The blood cholesterol level for men aged 30 to 39 has a standard deviation of 12 mg/dL. For women in the same age group, the standard deviation is 24 mg/dL. A sample of 20 men aged 30 to 39 had a mean cholesterol level of 204 mg/dL.
A sample of 28 women aged 30 to 39 had a mean cholesterol level of 210 mg/dL.

What is the probability of observing these sample means if the population means are the same?

0.2542
0.1271
1.14
-1.14

The probability that you roll a two on a six-sided die is 1 6 16 . if you roll the die 60 times, how many twos can you expect to roll

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12