Question

A random sample of 15 statistics textbooks has a mean price of $105 with a standard deviation of $30.25. 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 the distribution of statistics textbook prices is not normally distributed

Answer 1

Answer:

neither normal distribution nor t-distribution

Step-by-step explanation:

given data

no of sample = 15

mean = $105

standard deviation = $30.25

to find out

whether a normal distribution or a t-distribution

solution

this is neither normal distribution nor t- distribution because here we know t, z is use for normal and difference ( n greater  than 30 and Standard Deviation used z  and the  for n less than 30 ,  Standard Deviation not known use for t distribution  ) so it we can say it is neither normal distribution nor t- distribution