The mean age at first marriage for respondents in a survey is 23.33, with a standard deviation of 6.13
Calculate the Z score associated with an observed age at first marriage of 25.50 and explain what the Z score tells you.
Calculate the observed age at first marriage associated with a Z score of -0.72.
What proportion of respondents were married for the first time between the ages of 20 and 30?
If an individual was married for the first time at the age of 35, what percentile is he or she in?
In a normal distribution, how many standard deviations from the mean is the 95th percentile?
According to the central limit theorem what happens to the sampling distribution of sample means as N becomes larger?