3.1 The Normal Distribution

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Question 20

A random sample of size $n$ is taken from a population that is normally distributed with mean $25$ and standard deviation $4$ . Find the minimum sample size such that the probability of the sample mean being greater than $27.5$ is less than $1%1\%$ .

[5]

3.1 The Normal Distribution

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Question 20

A random sample of size $n$ is taken from a population that is normally distributed with mean $25$ and standard deviation $4$ . Find the minimum sample size such that the probability of the sample mean being greater than $27.5$ is less than $1%1\%$ .

[5]

3.1 The Normal Distribution

Question 20

Markscheme

3.1 The Normal Distribution

Question 20

Markscheme

3.1 The Normal Distribution

Question 20

3.1 The Normal Distribution Questions

3.1 The Normal Distribution

Question 20

3.1 The Normal Distribution Questions