Sta2023 Module 2 Test With Answers

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STA2023 Module 2 Test
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers
the question.
A graphical display of a data set is given. State whether the distribution is (roughly) symmetric, right skewed, or left
skewed.
1) Two dice were rolled and the sum of the two numbers was recorded. This procedure was repeated 400
times. The results are shown in the relative frequency histogram below.
A) Left skewed
B) Symmetric
C) Right skewed
Answer: B
Objective: (2.4) Classify Distribution as Symmetric or Skewed
Complete the contingency table and use it to solve the problem.
2) The partially filled contingency table gives the relative frequencies of the data on age (in years) and sex
from the residents of a retirement home.
Age (yrs)
60-69
70-79
Over 79
Total
Male
0.24
0.1
0.06
Female
0.2
0.2
0.2
Total
1
What percentage of residents are males over 79?
A) 0.6%
B) 6%
C) 5.5%
D) 8%
Answer: B
Objective: (2.2) Complete and Use Contingency Table
1

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