Mathematics, 03.08.2021 18:40, fonsworth5
Two different groups in a statistics class are conducting a survey to estimate the mean number of units students at their college are enrolled in. The population mean and standard deviation are unknown. The sample from the first group survey has 49 data values. The sample from the second group survey has 81 data values. For each sample, the groups construct a 90% confidence interval to estimate the population mean.
Which confidence interval will have greater precision (smaller width) for estimating the population mean?
a. The confidence interval based on the sample of 49 data values will be more precise.
b. Both confidence intervals will have the same precision.
c. The confidence interval based on the sample of 81 data values will be more precise.
Answers: 2
Mathematics, 20.06.2019 18:04, docholiday
Lilianna uses 3/4 calories per minute just by sitting. she uses 1 more calorie per minute by walking. lilianna uses a total of 12 1/4 calories walking to the park. lilianna uses the equation, d(.75+1)=12.25 to represent the situation. what does the variable d represent in the equation?
Answers: 2
Mathematics, 21.06.2019 19:10, brownzackery71
Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.
Answers: 2
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