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Statistics
Test Description: Normal distribution
Instructions: Answer all questions to get your test result.
1) Suppose that SAT mat scores for a year are approx. normal. With a mean of 510 and a sigma of 100. What is the probability a random score selected is greater than 610?
A
0.5
B
.68
C
0.16
D
.34
2) Suppose that SAT mat scores for a year are approx. normal. With a mean of 510 and a sigma of 100. What is the probability that randomly selected score is greater than 710?
A
.05
B
.10
C
.01
D
.025
3) What is a lurking variable?
A
None of these
B
an association used to debunk your experiment
C
something required in any study or experiment
4) If your height is 54 inches, and the mean is 58 inches with a standard deviation of 1.2, in which standard deviation category do you fall?
A
above 3 standard deviations
B
between 3 standard deviations
C
between 2 standard deviations
D
between 1 standard deviation
5) Your height is 54 inches, and the mean is 58 inches with a standard deviation of 1.2. Your friends height is 60 inches. Who is relatively farther from the mean?
A
Your friend
B
You
6) What is standard deviation?
A
A measure of how spread out the data is
B
not important
C
the same thing as normal distribution
D
a measure of the mean
7) Jackie is within 2 standard deviations of the mean. How much data is left in the data?
A
10%
B
12%
C
2.5%
D
5%
8) What is the genreal rule for data that is approximately normal?
A
68-95-99.9
B
68-95-99.7
C
66-95-99.7
D
66-95-99.9
9) If a data set is approximately normal with a mean of 67 and a sigma value of 7, will data be spread out?
A
yes, because it approximately normal
B
no, because the sigma value is less than 10.
C
no, because the data is normal anyway
D
yes, because the sigma value is a big number
10) If a study is subject blind then...
A
both giver and receiver do not know which treatment they are getting
B
the person giving the treatment does not know which treatment they are giving
C
The person receiving the treatment does not know which treatment he/she is getting
*select an answer for all questions
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