Arandom sample of 500 reports an average yearly income of $42,000 with a standard deviation of $1000. an estimate of the parameter at the 95% level is about $175 wide. in this research situationa. the alpha level is 1000. b. we can be 95% confident that the population mean is 42,000 ± 175. c. the sample mean is $175. d. the sample size is much too small to justify the use of estimation procedures. e. we can be 95% confident that the population mean is 42,000 plus or minus 87.50

E

Step-by-step explanation:

Confidence Interval = mean + or - error margin

Mean = 42,000, error margin = width of estimate of the parameter ÷ 2 = 175 ÷ 2 = 87.50

We can be 95% confident that the population mean is 42,000 plus or minus 87.50

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.

answer: 12/52

step-by-step explanation: my reasoning is that there are 12 face cards in a deck and a total of 52 cards in all.