Stats Section 2.1 and 2.2
Quiz
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
Barbara White
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
For this distribution of 52 students, what is the percentile for a height of 175?
75th
73rd
71st
69th
67th
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A company determines the mean and standard deviation of the number of sick days taken by its employees in one year. Which of the following is the best description of the standard deviation?
Approximately the mean distance between the number of sick days taken by individual employees and the mean number of sick days taken by all employees
Approximately the median distance between the number of sick days taken by individual employees and the median number of sick days taken by all employees
The distance between the greatest number of sick days taken by an employee and the mean number of sick days taken by all employees
The number of days separating the fewest sick days taken and the most sick days taken when considering all employees
The number of days separating the fewest sick days taken and the most sick days taken when considering the middle 50 percent of the distribution
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bill's z-score for his time in the 100 meter race is z= –1.56. Sam's z-score for the same race is z= –1.34. Which runner is faster?
Bill
Sam
Not enough information.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Research indicates that the standard deviation of typical human body temperature is 0.4 degree Celsius (C). Which of the following represents the standard deviation of typical human body temperature in degrees
Fahrenheit (F), where F = (9/5)C + 32 ?
9/5(0.4) + 32
9/5(0.4)
9/5(0.4)2
(9/5)2(0.4)
(9/5)2(0.4)2
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What presidents' age is closest to the 75th percentile?
60
65
70
50
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Calculate the standardized score (z-score) for a student who is 152cm tall. The mean of the population if 171.4cm and the standard deviation is 9.2cm.
≈ –2.1cm
≈ 2.1cm
≈ –2.1
≈ 2.1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The mean and standard deviation of AP Stats students' heights is 171.4cm and 9.2cm respectively. If 5cm is added to all student heights, how does this affect the standard deviation?
It is now 14.2cm.
It is now 4.2cm.
It is still 9.2cm.
It cannot be determined without knowing all the data values.
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