Assume that in your History class you have earned test scores of 78, 82, 56, and 72. Only 1 test remains. If you need a mean score of 75 to earn a C in the class, what must you score on the final test?
SAT Prep on Statistics

Quiz
•
Mathematics
•
11th - 12th Grade
•
Hard
Barbara White
FREE Resource
100 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
75
87
12
57
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Find the mean and standard deviation (Sx) for the following data set:
89, 72, 100, 87, 65, 98, 77, 92
85, 12.5
75.3, 30.65
85, 11.7
88, 12.5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the z score if the mean is 80, standard deviation is 5, and x=87.
-1.4
1.4
-1.75
1.75
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find x if the mean is 20, standard deviation is 6, and z=1.32.
32.4
7.92
-12.08
27.92
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Assume that the math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. If you score 400 on the math portion, what percent of those taking the test scored above you?
52%
84%
98%
92%
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You choose a marble out of a bag with the marbles above. Without replacing the first marble, you choose a second. Find the probability you choose a white then red.
3/50
1/12
1/5
1/15
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