The average rainfall during the month of November in San Francisco, California, is 2.62 inches. The standard deviation is 2.79 inches. What is the standardized score (z-score) for 11.78 inches, the rainfall in San Francisco during November 1885?
Q. 2The average rainfall during the month of November in San Francisco, California, is 2.62 inches. The standard deviation is 2.79 inches. What is the standardized score (z-score) for 5.18 inches, the rainfall in San Francisco during November 2001?
Q. 3Suppose that the average height for college men is 66 inches. If the height distribution is bell-shaped, and 95 of the men have heights between 60 inches and 72 inches, what is the standard deviation of heights for this population?
Q. 4For each of the following numerical summaries, decide whether it is a resistant statistic or not: mean, median, standard deviation, range, interquartile range.
Q. 5Explain the difference between the population standard deviation and the sample standard deviation s.
Q. 6Suppose that amount spent by students on textbooks this semester has approximately a bell-shaped distribution. The mean amount spent was 300 and the standard deviation is 100 . A student spent 500 on textbooks. What percentile does their value correspond to?
a. 97.5th percentile
b. 95th percentile
c. 5th percentile
d. 2.5th percentile
Q. 7Suppose that amount spent by students on textbooks this semester has approximately a bell-shaped distribution. The mean amount spent was 300 and the standard deviation is 100 . What percent of students spent more than 350?
a. 50
b. 0.5
c. 69.15
d. 30.85
Q. 8Suppose that amount spent by students on textbooks this semester has approximately a bell-shaped distribution. The mean amount spent was 300 and the standard deviation is 100 . What amount spent on textbooks has a standardized score equal to 0.5?
a. 150
b. 250
c. 300.50
d. 350
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