If appropriate, construct a 99% confidence interval for the mean calorie count for all 12-ounce milkshakes sold at fast-food restaurants. Round the answers to at least two decimal places. A 99% confidence interval for the mean calorie count for all 12-ounce milkshakes sold at fast- food restaurants is

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If appropriate, construct a 99% confidence interval for the mean calorie count for all 12-ounce
milkshakes sold at fast-food restaurantis. Round the answers to at least two decimal places.
A 99% confidence interval for the mean calorie count for all 12-ounce milkshakes sold at fast-
food restaurants is
Transcribed Image Text:If appropriate, construct a 99% confidence interval for the mean calorie count for all 12-ounce milkshakes sold at fast-food restaurantis. Round the answers to at least two decimal places. A 99% confidence interval for the mean calorie count for all 12-ounce milkshakes sold at fast- food restaurants is
EvfhQdHv
Let's shake on it: A random sample of 12-ounce milkshakes from 11 fast-food restaurants had the following number of calories.
473
476
700
375
642
608
510
591
450
580
472
Send data to Excel
Assume the population standard deviation is o = 89.
Part 1 of 3
Explain why it is necessary to check whether the population is approximately normal before constructing a confidence
interval.
It is necessary to check whether the population is approximately normal because
the sample size is less than or equal to 30
Part 2 of 3
Following is a dotplot of these data. Is it reasonable to assume that the population is approximately normal?
650
400
450
500
It is
reasonable to assume that the population is approximately normal.
Transcribed Image Text:EvfhQdHv Let's shake on it: A random sample of 12-ounce milkshakes from 11 fast-food restaurants had the following number of calories. 473 476 700 375 642 608 510 591 450 580 472 Send data to Excel Assume the population standard deviation is o = 89. Part 1 of 3 Explain why it is necessary to check whether the population is approximately normal before constructing a confidence interval. It is necessary to check whether the population is approximately normal because the sample size is less than or equal to 30 Part 2 of 3 Following is a dotplot of these data. Is it reasonable to assume that the population is approximately normal? 650 400 450 500 It is reasonable to assume that the population is approximately normal.
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