Question: Refer to Exercise 9 .10, where a zoologist collected 20 wild lizards in the southwestern United States. Do these data substantiate a claim that the

Refer to Exercise 9 .10, where a zoologist collected 20 wild lizards in the southwestern United States. Do these data substantiate a claim that the mean length is greater than 128 mm? Test with a = .05.

Data from in Exercise 9 .10

A zoologist collected 20 wild lizards in the southwestern United States. The total length (mm) of each was measured.

179 157 169 146 143 131 159 142 141 130
142 116 130 140 138 137 134 114 90 114

Obtain a 95% confidence interval for the mean length.

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