Answer:
how to help. what is the question.
Answer: a) 84 and b ) 2084
Step-by-step explanation:
Given : Sample standard deviation : s= $22.82
(Population standard deviation is unknown ) , so we use t-test.
Critical value or the 95% confidence intervals :
Formula to find the sample size :

a) E = 5


i.e. Required sample size : n= 84
b) E = 1


i.e. Required sample size : n= 2084
Answer:
F. y = 9.5x + 22.5
Step-by-step explanation:
let the number of shirts be x
For every shirt he pays $9.50 and $22.5 is the additional price
Answer:
The difference of the profit of two companies is $ 417
Step-by-step explanation:
Given as :
The company A loss amount in January = $ 255
The company B profit amount in January = $ 162
Let the difference between there profits = x
So, x = company B profit - ( company A profit)
I.e x = company B profit - ( - company A loss)
Or, x = $ 255 + $162
∴ x = $ 417
Hence The difference of the profit of two companies is $ 417 . Answer