The difference of two sample means is 22, and the standard deviation of the difference of the sample means is 10. the difference of the means of the two populations at a 95% confidence interval is ± .

1. convert. simplify your answer and write it as a proper fraction or as a whole or as a mixed number.4oz =_ pounds2. what is 1/3 of 66for both show work.

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old