Answer :
Answer:
.965035
Step-by-step explanation:
We are solving for the point estimate for the true difference between the means of two populations.
Weights of Smartphone A: 125,124,124,126,122,126,124,123,123,126,124 Weights of Smartphone B: 123,123,123,125,124,121,122,123,126,123,122, 125,123
Calculate the sample means for each group and then find the difference between the means.
Calculate the mean weight of Smartphone A.
Sum the weights: 125+124+124+126+122+126+124+123+123+126+124=1367
Divide by the number of weights, which is 11.
1367/11
124.2727272727(repeating)
Calculate the mean weight of Smartphone B.
Sum the weights: 123+123+123+125+124+121+122+123+126+123+122+125+123=1603
Divide by the number of weights, which is 13.
1603/13
123.3076923
1367/11- 1603/13 = 138/143 = .965034965
Rounding to 6 decimal places
.965035
