The days of training a new employee needs are normally distributed with a population standard deviation of 3 days and an unknown population mean. If a random sample of 23 new employees is taken and results in a sample mean of 18 days, use a calculator to find a 90% confidence interval for the population mean.

90% confidence interval for the population mean

(16.971 , 19.029)

Step-by-step explanation:

Step(i):-

Given mean of the sample x⁻ = 18 days

Standard deviation of the Population 'σ' = 3 days

Given sample size 'n' =23

Step(ii):-

90% confidence interval for the population mean is determined by

Critical value Z = 1.645

(18 -1.029 , 18 + 1.029)

(16.971 , 19.029)

final -

90% confidence interval for the population mean

(16.971 , 19.029)

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer