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let X and S^2 be the mean and variance of a random sample size n=16 from the normal distribution N(u, gamma^2)
a) find d (using distrubution tables) such that
P(-d < (X-u)/(S/sqrt16)= 0.95
b) rewrite the inequalities in part a) so that:
P[u(X,S) < u < v(X,S)] = 0.95
Find u(X,S) and v(X,S) so that once x and s are computed the interval u(x,s) to v(x,s) provides a 95% confidence interval for u.
On the same chart, produce a graph showing the original probability mass function, and a line graph showing your selected continuous probability density function.
1. at your supermarket the typical shopper spends 18.93 with a standard deviation of 12.52. you are wondering what
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