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For a sample of 2002 scores the mean score is 105.8. The standard deviation, ơ, is 15, Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval. Assume that IQ scores are normally distributed. A) Use the t-distribution. B) Cannot use normal distribution or t-distribution. C) Use normal distribution.

Determine whether the normal sampling distribution can be used. The claim is p> 0.015 and the sample size isn 150 A) Do not use the normal distribution. B) Use the normal distribution.

math   Statistics-And-Probability   
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