1. Suppose that you have to decide if the mean of the light bulbs last longer than 150 hours. You choose a random sample of 12 bulbs of each brand. What decision should you make at the 5% significance level (alpha = 0.05)? 128 189 139 148 196 191 163 101 195 142 174 114 a. t = 0.701 b.z = 0.175 c.z=0.19 d.t= 0.19

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1. Suppose that you have to decide if the mean of the light bulbs last longer than 150 hours. You choose a random sample of 12 bulbs of each brand. What decision should you make at the 5% significance level (alpha = 0.05)?
128 189 139
148
196 191
163
101
195
142
174 114
a. t = 0.701
b.z = 0.175
C. Z = 0.19
d. t = 0.19
Transcribed Image Text:1. Suppose that you have to decide if the mean of the light bulbs last longer than 150 hours. You choose a random sample of 12 bulbs of each brand. What decision should you make at the 5% significance level (alpha = 0.05)? 128 189 139 148 196 191 163 101 195 142 174 114 a. t = 0.701 b.z = 0.175 C. Z = 0.19 d. t = 0.19
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