Random Variables
Quiz
•
Mathematics
•
11th - 12th Grade
•
Medium
Standards-aligned
Used 35+ times
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18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A random variable is a(n) _______________ that describes a random occurrence.
numerical value
outcome
Event
probability
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
.88
.12
.78
.22
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
.21
.79
.64
.89
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The mean amount of time to make the batter for a cake is 14 minutes with a standard deviation of 2.5 minutes. The mean amount of time to bake the cake is 35 minutes with a standard deviation of 6.2 minutes. What is the mean time to make and bake a cake? What is the standard deviation?
mean = 49 min sd = 8.7 min
mean = 49 min sd = 6.685 min
mean = 49 min sd = 44.69 min
mean = 21 min sd = 8.7 min
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The mean hourly salary for a high school graduate (H) is $13.50 per hour with a standard deviation of $5.75. The mean hourly salary for a person with an Associate's degree A) is $19.75 with a standard deviation of $9.25. What is the standard deviation of the difference in the hourly salaries between a high school graduate and a person who earned an Associate's degree? D = H - A.
$10.89
$118.63
$-3.50
$12.20
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
The mean hourly salary for a high school graduate (H) is $13.50 per hour with a standard deviation of $5.75. The mean hourly salary for a person with an Associate's degree (A)is $19.75 with a standard deviation of $9.25. What is expected difference in the hourly salaries between a high school graduate and a person who earned an Associate's degree? D = H - A.
$33.25
$-3.50
$-6.25
$15.00
Tags
CCSS.8.EE.C.8C
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
State whether the variable is Discrete or Continuous;
A film critic's rating of a film, 0 to 4 stars
Discrete
Continuous
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