UNIT 2 - PRACTICE MILESTONE 2 )
Exam Questions and Correct Solutions
Erica is performing an experiment that requires her to weigh multiple samples. The masses of her
samples are found to be normally distributed with a mean of 157g and a standard deviation of 5.2g.
If Erica wants to convert her data to a standard normal distribution, which of the following statements is
true? - Correct Answers: The new mean would be 0, and the standard deviation would be 1.
An outlier is which of the following? - Correct Answers: A value in a data set that is significantly higher or
lower than most of the values in the data set
Consider the times (in seconds) that it took children and adults to solve a Rubik's cube at a competition.
What does the circled section represent? - Correct Answers: Two children took over 70 seconds to solve
the Rubik's cube.
Which of the following statements is true? - Correct Answers: The interquartile range is better than the
standard deviation to describe skewed data sets.
The data below shows the number of text messages received by a group of students in a day.
How many students received 10 to 13 message? - Correct Answers: 9
Stan is looking at the statistics for his favorite baseball player, who has hit 25, 26, 32, 38, 43, 40, 28, 32,
34, and 42 home runs in ten seasons.
What is the median in this data set? - Correct Answers: 33
Which of the following statements is NOT true about the normal distribution? - Correct Answers: The
normal distribution is an example of a bimodal distribution.
Exam Questions and Correct Solutions
Erica is performing an experiment that requires her to weigh multiple samples. The masses of her
samples are found to be normally distributed with a mean of 157g and a standard deviation of 5.2g.
If Erica wants to convert her data to a standard normal distribution, which of the following statements is
true? - Correct Answers: The new mean would be 0, and the standard deviation would be 1.
An outlier is which of the following? - Correct Answers: A value in a data set that is significantly higher or
lower than most of the values in the data set
Consider the times (in seconds) that it took children and adults to solve a Rubik's cube at a competition.
What does the circled section represent? - Correct Answers: Two children took over 70 seconds to solve
the Rubik's cube.
Which of the following statements is true? - Correct Answers: The interquartile range is better than the
standard deviation to describe skewed data sets.
The data below shows the number of text messages received by a group of students in a day.
How many students received 10 to 13 message? - Correct Answers: 9
Stan is looking at the statistics for his favorite baseball player, who has hit 25, 26, 32, 38, 43, 40, 28, 32,
34, and 42 home runs in ten seasons.
What is the median in this data set? - Correct Answers: 33
Which of the following statements is NOT true about the normal distribution? - Correct Answers: The
normal distribution is an example of a bimodal distribution.
