The Willow Run Outlet Mall has two Haggar Outlet Stores, statistics homework help

  1. TheWillow Run Outlet Mall has two Haggar Outlet Stores, one located on PeachStreet and the other on Plum Street. The two stores are laid out differently,but both store managers claim their layout maximizes the amounts customers willpurchase on impulse. A sample of ten customers at the Peach Street storerevealed they spent the following amounts more than planned: $17.58, $19.73,$12.61, $17.79, $16.22, $15.82, $15.40, $15.86, $11.82, $15.85. A sample offourteen customers at the Plum Street store revealed they spent the followingamounts more than they planned when they entered the store: $18.19, $20.22,$17.38, $17.96, $23.92, $15.87, $16.47, $15.96, $16.79, $16.74, $21.40, $20.57,$19.79, $14.83. For Data Analysis, a t-Test: Two-SampleAssuming Unequal Variances was used.

    At the .01 significance level is therea difference in the mean amount purchased on an impulse at the two stores?Explain these results to aperson who knows about the t test fora single sample but is unfamiliar with the ttest for independent means.

Hypothesis Test: Independent Groups (t-test, unequalvariance)

Peach Street

Plum Street






std. dev.







difference (Peach Street – Plum Street)


standard error of difference


hypothesized difference






confidence interval 99.% lower


confidence interval 99.% upper


  margin of error

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