6. (two points) The bi-monthly salaries for the 12 workers at my local Chick Fil-A are as follows:

Worker 1 and 7 is 774

Worker 2, 8 & 9 is 695

Worker 3 is 1150

Worker 4, 10, 11, 12 is 565

Worker 5 is 583

Worker 6 is 612

Calculate the measures of variability: range, variance, and standard deviation. Then create a graph of your choosing.

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7. (two points) I had 15 students last term who earned the following grades:

98 85 79 73 72 85 95 92 75 97 92 83 95 78 87

What is the 5 numbers summary for these students? Create a box plot for the data.

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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 9.

1. Find the probability that a randomly selected adult has IQ < 115

1. Find the probability that a randomly selected adult has IQ > 90

1. Find P30, which is the IQ score at the 30th percentile.

1. What percentage of adults have scores between 91 and 109?

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10. (two points) I always wanted to give away my vast wealth, so I am going to have a lottery next year. You have to pick the six winning numbers from 1-36. Each randomly selected number is different, and order does not matter. What is the probability of your winning?