Diastolic blood pressure measurements on American men ages 18 44 years follow approximately a normal curve with 81 mm Hg and 11 mm Hg The distribution for women ages 18 44 is also approximately normal with the same SD but with a lower mean 15 mm Hg Suppose we are going to measure the diastolic bloo...

We need to find n to achieve a power of 09 The effect ...

Diastolic blood pressure measurements on American men ages 18-44 years follow approximately a normal curve with

Question:

Diastolic blood pressure measurements on American men ages 18-44 years follow approximately a normal curve with µ = 81 mm Hg and σ = 11 mm Hg. The for women ages 18-44 is also approximately normal with the same SD but with a lower mean: µ = 15 mm Hg. Suppose we are going to measure the diastolic blood pressure of n randomly selected men and n randomly selected women in the age group 18-44 years. Let E be the event that the difference between men and women will be found statistically significant by a t test. How large must n be in order to have Pr{E} = 0.9
(a) If we use a two-tailed test at α = 0.05?
(b) If we use a two-tailed test at α = 0.01?
(c) If we use a one-tailed test (in the correct direction) at α = 0.05?
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...