MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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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
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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.
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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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