# Statistics: Question Preview (ID: 22748)

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**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)

**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.

**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

**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

**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)

**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

**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)

**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

**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

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