PVC Statistics Questions

StatisticsName_____________________________
This test is worth 60 points. Solve each problem on a separate sheet of paper, if needed, and then write your answer on the
line provided. Please do not use blue or red pen.
Determine if the numerical value describes a parameter or a statistic.
1) A survey of 1,420 people in the U.S. revealed that 36% of those surveyed have debt.
Answer ____________________
Determine whether the statement describes a population or a sample.
2) The seniority of all the teachers in a high school.
Answer ____________________
Fill in the blank.
3) Results sometimes produce flawed conclusions which can be a form of ______________.
Answer ______________
Determine if the numerical value describes a population parameter or a sample statistic.
4) 48% of all freshhmen at a college reside on campus.
Answer ____________________
Classify the following data as (a) qualitative or quantitative, (b) discrete or continuous, or neither, and (c) indicate
the level of measurement for the data.
5) Birth years of each person in your family.
Answer ____________________
Identify the sampling technique used for the following study.
6) A pollster interviews each student in local high school.
Answer ____________________
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Determine level of measurement for given statement below: nominal, ordinal, interval, or ratio.
7) Birth order of children in your immediate family.
Answer ____________________
Determine class width for the data below using five classes. Round your answer to the nearest integer. State your
answer as an integer.
8)
1595 1599 1685 1699 1699
1699 1699 1757 1787 1799
1799 1885 1888 1899 1899
1899 1984 1999 1999 1999
Answer ____________________
Answer the following.
9) A bookstore sells on average 1800 books each month. The pie chart displays the most
popular book categories, by percentage, each month. Find the number of science fiction
books sold each month. Round your answer to the nearest integer.
Answer ____________________
State class boundries for given information.
10) Find the boundries of the fifth class, given that the midpoint of the first class is 1,250, and
the class width is 100.
Answer ____________________
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Identify the population or sample being studied.
11) The number of times 34 out of all students on your floor order fast food in a week. State
the sample being studied.
Answer ____________________
Find the sample mean of the given data. Round your answer to nearest tenth if necessary.
12) 10, 8, 12, 7, 14, 18, 9, 6
Answer ____________________
Find the median of the given data.
13) 10.2, 16.1, 8.9, 20.3, 12.7, 18.6
Answer ____________________
Calculate the value of the sample standard deviation. Round your answer to one decimal place.
14) 18, 28, 20, 34, 24, 38
Answer ____________________
Calculate the value of the sample variance. Round your answer to one decimal place, if needed.
15) 8, 13, 16, 9, 19, 7
Answer ____________________
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