Statistics Question Preview (ID: 22748)


Normal Distribution. TEACHERS: click here for quick copy question ID numbers.

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) 0.16
b) 0.5
c) .68
d) .34

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) .025
d) .01

What is a lurking variable?
a) an association used to debunk your experiment
b) something required in any study or experiment
c) None of these
d)

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) between 1 standard deviation
b) between 2 standard deviations
c) between 3 standard deviations
d) above 3 standard deviations

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) You
b) Your friend
c)
d)

What is standard deviation?
a) A measure of how spread out the data is
b) a measure of the mean
c) the same thing as normal distribution
d) not important

Jackie is within 2 standard deviations of the mean. How much data is left in the data?
a) 10%
b) 2.5%
c) 5%
d) 12%

What is the genreal rule for data that is approximately normal?
a) 66-95-99.7
b) 68-95-99.9
c) 66-95-99.9
d) 68-95-99.7

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 the sigma value is a big number
b) yes, because it approximately normal
c) no, because the data is normal anyway
d) no, because the sigma value is less than 10.

If a study is subject blind then...
a) the person giving the treatment does not know which treatment they are giving
b) The person receiving the treatment does not know which treatment he/she is getting
c) both giver and receiver do not know which treatment they are getting
d)

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