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I had 14 students last term who earned the following grades:

98  85  89  73  72  85  85  92  85 97 92 93 95 86

What is the 5 numbers summary for these students? what does a box plot for the data look like


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 20.


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


  1. Find the probability that a randomly selected adult has IQ > 70


  1. Find P30, which is the IQ score at the 305h percentile.


  1. What percentage of adults have scores between 80 and 120?



Ten peas are generated from parents having the green/yellow pair of genes so there is a 75% probability that an individual pea will have a green pod. Find the probability that

among the 10 offspring peas, no more than 5 have green pods.

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