At the time she was hired as a server at the Grumney Family

At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told,

Solution

(a)H₀:mu =70 ; H₁: mu > 70

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(b) Reject H₀ if z > 2.05

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(c)test statistic is

Z=(xbar-mu)/(s/vn)

=(71.08-70)/(3.46/sqrt(32))

=1.77

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(d) Do not reject H₀

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(e) The p-value= P(Z>1.77) =0.0384 (from standard normal table)