# Question: A normal distribution has a mean of 60

A normal distribution has a mean of µ = 60 and a standard deviation of σ = 18. For each of the following samples, compute the z-score for the sample mean and determine whether the sample mean is a typical, representative value or an extreme value for a sample of this size.

a. µ = 67 for n = 4 scores

b. µ = 67 for n = 36 scores

a. µ = 67 for n = 4 scores

b. µ = 67 for n = 36 scores

**View Solution:**## Answer to relevant Questions

A random sample is obtained from a normal population with a mean of µ = 95 and a standard deviation of σ = 40. The sample mean is µ = 86. a. Is this a representative sample mean or an extreme value for a sample of n = 16 ...For random samples of size n = 25 selected from a normal distribution with a mean of µ = 50 and a standard deviation of σ = 20, find each of the following: a. The range of sample means that defines the middle 95% of the ...Xu and Garcia (2008) conducted a research study demonstrating that 8-month-old infants appear to recognize which samples are likely to be obtained from a population and which are not. In the study, the infants watched as a ...In a study examining the effect of alcohol on reaction time, Liguori and Robinson (2001) found that even moderate alcohol consumption significantly slowed response time to an emergency situation in a driving simulation. In a ...Define the alpha level and the critical region, and explain how they are related.Post your question