# Two points the bi monthly salaries for the 12 workers

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Chapter 3 / Exercise 2
Understandable Statistics: Concepts and Methods
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6. (two points) The bi-monthly salaries for the 12 workers at my local Chick Fil-A are as follows:Worker 1 and 7Worker 2, 8 & 9Worker 3Worker 4, 10, 11, 12Worker 5Worker 67746691110546531612Calculate the measures of variability: range, variance, and standard deviation. Create a frequencydistribution table that includes relative and cumulative relative frequency. Then create a graph of your choosing.
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7. (two points) I had 16 students last term who earned the following grades: 98 85 89 73 72 85 85 92 85 56 What is the 5 numbers summary for these students? Create a box plot for the data.98 97 92 93 95 865 Number Summary: Min:56 Q1: 85 Median: 87.5 Q3: 95 Max: 98
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Chapter 3 / Exercise 2
Understandable Statistics: Concepts and Methods
Brase Expert Verified
8. (two points) I developed an achievement test and normalized it on people throughout the country over a year. My test has scores that are normally distributed with a mean of 100 and a standard deviation of 10.M= 100S= 10a.Find the probability that a randomly selected adult has IQ < 115
b.Find the probability that a randomly selected adult has IQ > 70Z>70-100/10Z>-3=0.99865c.Find P30,which is the IQ separating the bottom 30% from the top 70%d.What percentage of adults have scores between 90 and 110?
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