A researcher records a large sample of data with a mean equal to 12 and a standard deviation equal to 4. If the data are normally distributed, then using the empirical rule which of the following gives the closest estimate for the percentage of data that falls between scores of 8 and 16?
A. at least 68%
B. at least 95%
C. at least 99.7%
D. at least 100%
Ans: A
You might also like to view...
In Froebel’s curriculum, the term “gifts” refers to _________
a. children’s talents b. parents c. books d. manipulative activities
What percentage of LGBT student report feeling afraid for their safety in school?
a. 9% b. 22% c. 64% d. 83%
Effective teachers provide all of the following EXCEPT
a. corrective feedback b. answer keys to accompany all assignments c. lesson closure that summarizes content d. a system for monitoring student progress
You can apply the normal curve table to a standardized distribution ______.
a. if the population standard deviation (?) is known b. when your sample is small c. if the population mean (µ) is known d. when the distribution of raw scores is normally distributed