Chapter 7: Q.23 (page 428)
What is the standard deviation of ?
Short Answer
The standard deviation of.
Chapter 7: Q.23 (page 428)
What is the standard deviation of ?
The standard deviation of.
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Get started for freeM&M candies large candy bags have a claimed net weight of g. The standard deviation for the weight of the
individual candies is g. The following table is from a stats experiment conducted by a statistics class.
Red | Orange | Yellow | Brown | Blue | Green |
The bag contained candies and the listed weights in the table came from randomly selected candies. Count the weights.
a. Find the mean sample weight and the standard deviation of the sample weights of candies in the table.
b. Find the sum of the sample weights in the table and the standard deviation of the sum of the weights.
c. If M&Ms are randomly selected, find the probability that their weights sum to at least .
d. Is the Mars Company’s M&M labeling accurate?
Use the information in Example 7.8, but use a sample size of 55 to answer the following questions. a. Find P( x ¯ < 7).
b. Find P(Σx > 170).
c. Find the 80th percentile for the mean of 55 scores.
d. Find the 85th percentile for the sum of 55 scores.
Find the percentage of sums betweenstandard deviations below the mean of the sums and one standard deviation above the mean of the sums.
An unknown distribution has a mean of 25 and a standard deviation of six. Let X = one object from this distribution. What is the sample size if the standard deviation of ΣX is 42?
A manufacturer produces 25 -pound lifting weights. The lowest actual weight is 24 pounds, and the highest is 26 pounds. Each weight is equally likely so the distribution of weights is uniform. A sample of 100 weights is taken.
Draw the graph from the exercise.
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