A health fitness research group wishes to estimate the mean amount of time (in hours) that members of a fitness center spend each week exercising at the center. They want to estimate the mean within a margin of error of 0.5 hours with a 95% level of confidence. Previous data suggests that σ = 3.2. Find the minimum sample size that could be used. (Round your
�
∗
z
∗
three decimal places)



Minimum Sample Size: