First Exam

1. Circle the right Answer.

There are total 1020 members in BMCC Math Club. 50% of them are female. 45 out of 1020 are from Prof. Xin, Ke's class. 20% of 45 students are international students. In order to join Math Club, students must take one exam. You can take the exams as many times as you want. Members meet every Wednesday in Room N736. (10 points)

a. 50% is a

b. 20% is a

c. 1020 is

d. 736 is

e. The number of times

Parameter or Parameter or

Statistic

Statistic Quantitative or Categorical

Quantitative or Continuous or

Categorical Discrete

2. At a recent chess tournament, all 15 of the participants had to fill out a form that gave their names, address and age. The ages of the participants were recorded as follows: 36, 48, 54, 92, 57, 63, 66, 76, 66, 80, 82, 65, 39, 77, and 45. Use the data to construct a frequency table and histogram with 3 classes.(15 points)

Classes

Class Boundaries

Frequency

Midpoint

Cumulative Frequency

3. For the set of data below, determine the 5 number summaries. Construct the resulting box and whisker plot. (20 pts)

5, 3, 8, 6, 1, -10, 3, 9, 7, 4, x, (x is your last digit of your CUNYFirst ID number)

4. Sam has 6 rose bushes. He counted the flowers on each of them. There are 8, 2, 5, 4, 11 and 9. Find the Standard Deviation. Is X a "Usual" number of flowers? X is your last two digits of your CUNYFirst ID Number. (00 = 0, 01 = 1, ...) (20 points)

5. The list gives the durations, in years, of the top 20 longest-running Canadian television shows. (10 points)

18 20 38 19 22 23 23 27 36 18 18 18 20 25 18 24 24 33 25 X

X is your last two digits of your CUNYFirst ID Number. (00 = 10, 01 = 11, 02 = 12, ...) Construct a stem-and-leaf plot.

6. An emergency service wishes to determine whether a relationship exists between the outside temperature and the number of emergency calls it receives for a 7-hour period. The data are shown. (25 points)

Temperature x 25 10 27 30 33 No. of calls y 7 4 8 10 11

a) Find the correlation coefficient r (If you use any software or online calculator, please take the screenshot. You will get extra points if you do by hand.)

b) Find the regression equation (If you use any software or online calculator, please take the screenshot. You will get extra points if you do by hand.)

c) Graph the regression equation. (If you use any software or online calculator, please take the screenshot. You will get extra points if you do by hand.)