Easter candy expenditure per consumer is normally distributed with a standard deviation of $4.01. A candy manufacturer claims that the average Easter candy expenditure per consumer is no less than $30. Fifteen consumers were randomly selected. The average Easter candy expenditure per consumer was found to be $28.67 with a standard deviation of $3.50. Can you reject the candy manufacturer's claim at =.05?

What is the 99% confidence interval for the true average Easter candy expenditure per consumer (in $)?

a.(26.9668, 30.3732)

b.(25.9797, 31.3603)

c.(26.0039, 31.3361)

d.None of the answers is correct

e.(26.6407, 30.6993)