Probability & StatisticsName______

1st Nine Weeks Exam Review – Day 1

Classify as nominal, ordinal, discrete, or continuous.

1.______telephone numbers for Anderson, SC

2.______a person’s hair color

3. ______large, medium, small

4.______the temperature in our classroom

5.______the number of A’s on your report card

Identify as random, systematic, stratified, cluster, or convenience.

6.______Out of the 10 bands performing today, everyone from 3 of the bands

will continue on to the state competition.

7.______2 officers from each band will meet on the field to receive awards.

8.______Each person is assigned a number and then a number is drawn from a

jar.

9.______Every 5th band member is evaluated by the judge.

10.______I need information on band uniforms so I survey every band student

exiting the bus at a band competition.

Use the following data to answer question 10.

4, 5, 5, 6, 9,9,9, 10, 11, 12

10.a. Find the mean

  1. Find the mode
  2. Find the median
  3. Find the range
  4. Find the standard deviation
  5. Find the variance
  6. Find the midquartile
  7. Find the midrange
  8. Find the 35th percentile
  9. Find the 60th percentile
  10. Find the 50thpercentile
  11. Draw the box plot and find any outliers.

Use the following table to answer question 11.

11.a. Find the mean

b. Find the median

  1. Find the standard deviation
  2. Find the variance
  3. Name the modal class

Answer the following.

12.If the variance is calculated to be 73.6, what is the standard deviation?

13.If the standard deviation is 2.3, what is the variance?

14.If a student made an 87 on a test and the class average was a 95 with a standard deviation of 3, find the student’s standard score.

15.If the average number of CD’s owned by a teenager is 45, and the standard deviation is 5, find the z-score for a teenager who owns 52.

16. a. Construct a histogram.

  1. Find the relative frequency

of the 3rd class.

31.Construct a stem and Leaf Plot.

4, 11, 13, 13, 20, 24, 24, 27, 29, 29

33, 38, 51,51, 56, 60, 73

S / L
1 / 0 0 4 4 7 8 9
2 / 2
3 / 5 5 5 8 8
4 / 1 8 9

32.What is the sample size of the following stem and leaf?

33. In constructing a pie graph, find the sector degree of Hondas in the following frequency distribution?

Favorite
Cars / Frequency
Ford / 367
Mazda / 591
Honda / 682
Chrysler / 207

34.Identify the following as quantitative or qualitative.

______a. the percentage of flights cancelled at U.S. airports

______b. a summary of expenditures of on your credit card

______c. identify the different class levels of people on board the Titanic

______d. the number of ipods owned

______e. choose your favorite brand of energy drink

  1. Find the mean, median, mode, midrange, range, standard deviation, and variance of the following data. (***HINT*** Use the shortcut without the lists!)

Mean = ______Range = ______

Median = ______St Dev = ______

Mode = ______Variance = ______

Midrange = ______

36.Tell whether the following are an experiment or an observational study.

  1. Researchers compare the academic performances of music students and non-music students.
  2. Give one group of people omega-3 fats to see if it helped with bipolar disorder while another group was given a placebo.