A random sample of 30 receipts for individuals shopping at the Community Drug Store showed the sample mean to be`x = $28.19 with sample standard deviations= $4.06

a.Use Chevyshev's theorem to find the smallest interval centered on the mean in which we can expect at least 75% of the datato fall.

b.Use Chevyshev's theorem to find the smallest interval centered on the mean in which we can expect at least 88.9% of the datato fall.

c. Use Chevyshev's theorem to find the smallest interval centered on the mean in which we can expect at least 93.8% of the datato fall.