Next 4 questions are based on this scenario: As a business analyst, Julie’s recent assignment was to use descriptive statistics to summarize and conveniently present the amount of sales tax (as percentages) in the 50 US states and District of Columbia (DC). Using her knowledge of statistics, she was able to draw the histogram (or distribution) of the sales tax data; see above. She also calculated the mean to be 4.5% with a standard deviation of 1%. One of the states has a sales tax of 5.5%. What is the z-score for this state?
Predict the percentage of states that charge between 1.5% and 7.5% sales tax.
a. Approximately 100%
b. At least 89%
c. Approximately 89%
d. At least 68%
In solving the percentage of states that charge between 1.5% and 7.5% sales tax, we must use:
Select one:
a. Empirical Rule
b. Boxplot
c. Coefficient of variation
d. Chebyshev’s Theorem
The median sales tax for all states has not been provided. But, we can still provide a range for its value. In the given sample,
Select one:
a. Median is less than 4.5%
b. Median is equal to 4.5%
c. Median is greater than 4.5%
d. Median is between 1% and 5%