8.21 A soft-drink machine is regulated so that theamount of drink dispensed averages 240 milliliters witha standard deviation of 15 milliliters. Periodically, themachine is checked by taking a sample of 40 drinksand computing the average content. If the mean of the40 drinks is a value within the interval x ± 208, themachine is thought to be operating satisfactorily; oth-erwise, adjustments are made. In Section 8.3, the com-pany official found the mean of 40 drinks to be = 236milliliters and concluded that the machine needed noadjustment. Was this a reasonable decision?

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Answered: 8.21 A soft-drink machine is regulated…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A population has a mean of u = 50 and a standard deviation of a = 10. If 3 points were added to every score in the population, what would be the new values for the mean and standard deviation? O The new mean is u = 47, and the new standard deviation is a = 13. The new mean is u = 47, and the standard deviation is still a = 10. O The new mean is u = 53, and the standard deviation is still o = 10. O The mean is still u = 50, and the new standard deviation is a = 13. If every score in the population were multiplied by 2, what would be the new values for the mean and standard deviation? The new mean is µ = 100, and the new standard deviation is still a = 10. The new mean is u = 52, and the new standard deviation is o = 20. The new mean is u = 100, and the new standard deviation is a = 20. The mean is still u = 50, and the new standard deviation is o = 20.
The scores on a mathematics exam have a mean of 70 and a standard deviation of 6. Find the x-value that corresponds to the z-score 5.19. O 64.8 O 121.9 O 18.1 O 101.1
Number 103 part D and E
Section 9.2 Homework Progress saved Done 80 8 √ ❤ ⠀ Score: 6/13 7/13 answered 35 Question 8 0/1 pt 3 2 Details In a survey, 22 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $39.2 and standard deviation of $2.9. Estimate how much a typical parent would spend on their child's birthday gift (use a 90% confidence level). Give your answers to 3 decimal places. Express your answer in the format of E. Submit Question 13
A population has a mean of μ = 60 and a standard deviation of σ = 12.a. For this population, find the z-score for each of the following X values.X = 69 X = 84 X = 63X = 54 X = 48 X = 45
Number 101 part A, B, and C
Answer d.

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