A City Claims That 75% of All Low Income Housing

A city claims that 75% of all low income housing is 1500 sq.ft.The tenants believe the proportion of housing this size is smaller than the claim,and hire an independent firm to test the hypothesis.Identify the Type I error in this context.

A) The firm concludes that the proportion of housing less than 1500 sq.ft.is smaller,but in fact there is no change in the proportion.
B) The product of the firm's sample size and sample proportion was less than 10.
C) The firm sampled all low income houses.
D) The firm concludes that the proportion of housing this size is rising since the majority of housing can only increase.
E) The firm shows there in no change in the proportion of housing this size,but in fact the proportion of houses less than 1500 sq.ft.is smaller.