Answer:
A
Step-by-step explanation:
X=-2 OR X=5 hope thats your answer
Answer:
The sample size is
Step-by-step explanation:
From the question we are told that
The margin of error is 
From the question we are told the confidence level is 97.5% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of
is
Generally we will assume the sample proportion to be 
Generally the sample size is mathematically represented as
=>
=>
Answer: 14.33
Step-by-step explanation:
Step-by-step explanation:
this month-100 percent
then previous month 100-20=80 percent
so
if 48=100percent
then x=80percent
x=(80×48)/100
x=38.4 ≈ 38 pairs if shoes