Complete Question
The complete question is shown on the first uploaded image
Answer:
a
b
c
The correct option is D
Step-by-step explanation:
From the question we are told that
The margin of error is
The largest value is k = 15
The smallest value is u = 7
From the question we are told the confidence level is 95% , hence the level of significance is
=>
Generally from the normal distribution table the critical value of is
Generally population standard deviation estimate is mathematically represented as
Here the Range is mathematically represented as
=>
=>
=>
=>
Generally the sample size is mathematically represented as
=>
=>
Generally to obtain a conservatively small sample size the population standard deviation estimate becomes
=>
=>
=>
Generally the conservatively small sample size is mathematically evaluated as
=>
=>
