Statistics 250
posted by Alica on .
For the past 20 years, the high temperature on April 15th has averaged µ = 62 degrees with a standard deviation of σ = 4. Last year, the high temperature was 72 degrees. Based on this information, last year's temperature on April 15th was the following.
a. far above average
b. above average, but it is impossible to describe how much above average
c. There is not enough information to compare last year with the average.
d. a little above average

2.5 standard deviations above average is far above average. That number implies a probability of 0.4% that high temperatre is 72 or above.

far above average

a.far above average

ERE

For the past 20 years, the high temperature on April 15th has averaged ì = 62 degrees with a standard deviation of ó = 4. Last year, the high temperature was 72 degrees. Based on this information, last year's temperature on April 15th was the following