STAT 200 University of Maryland Baltimore Statistics Midterm

Im studying and need help with a Statistics question to help me learn.

Im having trouble with this exam 1.For the following data construct a frequency distribution, showing lower and upper class limits, frequency, cumulative frequency, relative frequency, cumulative relative frequency and midpoints. Use 6 intervals.

10, 13, 14, 15, 16, 19, 22, 23, 25, 28, 29, 33, 37, 39, 42, 47, 48, 54, 55, 59, 62, 69, 75, 78, 81.

2.A study was done on a new pain medication in which a sample 35 arthritis patients were given a new drug and another sample of 35 arthritis patients were given a placebo. They were then asked to rate their amount of pain an hour after taking their pills. Is this an experimental or an observational study.

3.Find the mean, median and mode for the data in problem number one.

4.For problem #3 what be the best measure of center and why.

5.Describe what level of data each variable would fit.

a.Number of Fords and Chevys in a parking lot.

b.Weights of boys on a baseball team.

c.First three finishers in the Boston Marathon.

d.Average temperature per month in Anchorage Alaska.

6.In how many ways can you choose 5 people out of a group of 32.

7.In how many ways can you choose a President, Vice-President, Secretary and Treasure out of a group 25 students.

8.The following table represents the amounts of certain types of cars in a student parking lot.

Ford	Toyota	Dodge	Chevy	BMW
41	46	29	37	24

If I put the names of all of these cars in a hat and randomly choose one of them what is the probability I would choose.

a.A Dodge

b.A Chevy

c.A BMW

d.I would not choose a Ford.

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