A consumer affairs agency wants to check the average weight of a new product on the market. A random sample of 25 items of the product was taken and the weights (in grams) of these items were classified as follows: class boundaries frequency 74- 77 3 77- 80 6 80- 83 9 83-86 3 86- 89 4 (a) Find the third quartile of the weights (b) What percentage of the items had a weight less than 83 grams? (c) Calculate the mean and standard deviation of the weights.
A consumer affairs agency wants to check the average weight of a new product on the market. A random sample of 25 items of the product was taken and the weights (in grams) of these items were classified as follows: class boundaries frequency 74- 77 3 77- 80 6 80- 83 9 83-86 3 86- 89 4 (a) Find the third quartile of the weights (b) What percentage of the items had a weight less than 83 grams? (c) Calculate the mean and standard deviation of the weights.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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A consumer affairs agency wants to check the average weight of a new product on the
market. A random sample of 25 items of the product was taken and the weights (in grams) of
these items were classified as follows:
class boundaries | frequency |
74- 77 | 3 |
77- 80 | 6 |
80- 83 | 9 |
83-86 | 3 |
86- 89 | 4 |
(a) Find the third quartile of the weights
(b) What percentage of the items had a weight less than 83 grams?
(c) Calculate the mean and standard deviation of the weights.
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