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Data Analysis, Statistics & Probability

Posttest
 
This test is meant to be taken after you've finished studying this Power Tactics book. This test will tell you how well you've mastered the material and what topics you still need to review.
 

1.    What is the mean of set S?

S = {–3, –1.5, 1.5, 2, –3, 4.5, 5.5}

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2.    What is the average (arithmetic mean) of all the odd integers greater than 32 and less than 150?


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3.    If two coins are tossed at the same time, what is the probability, written as a fraction, that both will land with the same side up?


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4.    There are five numbers in a set: a, b, c, 5, and 17. If a, b, and c are positive integers, and the average of the set is 6, then which of the following could be the mode of the set?

(A) 3
(B) 4
(C) 6
(D) 7
(E) 8
5.    A new security code requires three single digits, each of which must be distinct. How many possible codes are there?


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Questions 6–8 refer to the following graph.



6.    During the one decade that Red River’s population decreased, by approximately what percent did the town’s total population change?

(A) 25%
(B) 20%
(C) 15%
(D) 10%
(E) 5%
7.    During which decade did Big City experience the greatest percentage in population growth?

(A) 1920–1930
(B) 1930–1940
(C) 1940–1950
(D) 1950–1960
(E) 1960–1970
8.    During which decade did two of the towns have the same population?

(A) 1920
(B) 1930
(C) 1940
(D) 1950
(E) 1960

Questions 9 and 10 refer to the following chart.



9.    If the total revenue for the month of July was $24,000, then how much did the store make in sales on books about poetry?

(A) $1,200
(B) $2,000
(C) $4,000
(D) $6,000
(E) $12,000
10.    If the categories of romance and fiction were put together, then their total in sales would be equal to which other category of book?

(A) Periodicals
(B) Poetry
(C) Nonfiction
(D) Misc.
(E) None of the above



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