a)
since the test score are being used to determine cheating (ie if test score showed surprising change from one year to the next), the variable is ordinal.
b)
The Z distribution follows a bell curve(normal distribution). If the distribution of the test scores follows a bell shape then the data is normally distributed ie there is no cheating
c)
If the distribution of the test scores follows a bell shape then the data is normally distributed ie there is no cheating
d)
The error would be a Type 1 Error as a type I error is the rejection of a true null hypothesis (also known as a "false positive" error)
02 Type Il error? Explan. 6.55 Cheating on standardized tests: In their book Freakonomics, Levitt and...