A member is designing a study to standardize new intelligence test It is known that scores on this type of test are normally distributed with a standard deviation of 15 0 Write down in terms of x the sample mean and n, the sample size, an expression for a 99 symmetric confidence interval for the mean of test score Calculate, to the nearest hundred, the value of n such that the with of this confidence intervalwill be less than 10

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Question: A member is designing a study to standardize new intelligence test. It is known that scores on this type of test are normally distributed with

A member is designing a study to standardize new intelligence test. It is known that scores on this type of test are normally distributed with a standard deviation of 15.0

Write down in terms of x the sample mean and n, the sample size, an expression for a 99% symmetric confidence interval for the mean of test score.
Calculate, to the nearest hundred, the value of n such that the with of this confidence intervalwill be less than 10

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