Name: ____________________________________
Alg.2/H Regents Review #23 due 5/19
1. Anne has a coin. She does not know if it is a fair
coin. She flipped the coin 100 times and obtained 73
heads and 27 tails. She ran a computer simulation of
200 samples of 100 fair coin flips. The output of the
proportion of heads is shown below.
3. What is the sample standard deviation of the data in
the table below, rounded to the nearest tenth?
Given the results of her coin flips and of her computer
simulation, which statement is most accurate?
1. 73 of the computer’s next 100 coin flips will be
heads.
2. 50 of her next 100 coin flips will be heads.
3. Her coin is not fair.
4. Her coin is fair.
2. Julie averaged 85 on the first three tests of the
semester in her mathematics class. If she scores 93 on
each of the remaining tests, her average will be 90.
Which equation could be used to determine how many
tests, T, are left in the semester?
1. 12.5 3. 17.1
2. 12.8 4. 18.7
4. The scores of 1000 students on a standardized test
were normally distributed with a mean of 50 and a
standard deviation of 5. What is the expected number of
students who had scores greater than 60?
1. 1.7 3. 46
2. 23 4. 304
2. 5. The table below shows the number of points scored
during the last six basketball games for two players.
Game Game Game Game Game Game
1 2 3 4 5 6 3. Player
1 25
32
11
7
19
24
4. Player
2 3
12
25
14
8
29
1. How much higher is Player 1's median score than Player
2's median score?
1. 10.5 3. 6.5
2. 8.5 4. 4.5
6. The table below displays the number of siblings of
each of the 20 students in a class.
8. Christopher looked at his quiz scores shown below
for the first and second semester of his Algebra class.
Semester 1: 78, 91, 88, 83, 94
Semester 2: 91, 96, 80, 77, 88, 85, 92
Which statement about Christopher’s performance is
correct?
What is the population standard deviation, to the nearest
hundredth, for this group?
1. 1.11 3. 1.14
2. 1.12 4. 1.15
7. Mrs. Porter recorded her students’ grades in the
frequency table below.
1. The interquartile range for semester 1 is greater
than the interquartile range for semester 2.
2. The median score for semester 1 is greater than
the median score for semester 2.
3. The mean score for semester 2 is greater than
the mean score for semester 1.
4. The third quartile for semester 2 is greater than
the third quartile for semester 1.
9. Which statement is true about the data set 4, 5, 6, 6,
7, 9, 12?
1. mean = mode 3. mean < median
2. mode = median 4. mode > mean
10. All of the students in Mr. Goshen’s class have
taken a test. The sum of their test scores is 1700.
All of the students in Mr. Haas’s class have taken
the same test, and the sum of their test scores is
1650.
Is it possible to compare the mean score of the test
takers in Mr. Goshen’s class to the mean score of the
test takers in Mr. Haas’s class?
Which statement is true for the data?
1. 2. 3. 4. mean > median > mode
mean > mode > median
mode > median > mean
median > mean > mode
1. Yes, because we know the sum of the test
scores, and we know that it is the same test.
2. Yes, because we know the sum of the test
scores, and we know that all of the students in
each class took the test.
3. No, because we don’t know how many students
are in each class.
4. No, because we don’t know the median value of
the test scores in each class.