To boost holiday sales, a jewelry store in Bismarck, North Dakota, is advertising the following promotion: "If more than seven i
nches of cumulative snow fall on December 24, 25, 26, 27, and 28, you get your money back on all purchases made on December 17." To analyze this promotion, the store manager has collected data and determined that snowfall over this 5-day period in December is normally distributed with an average of 6 inches and standard deviation of 0.559 inches. What is the probability that the store will have to refund the money to its December 17 customers? If required, round your answer to three decimal places.
1 answer:
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Step 1:
In descriptive statistics, a box plot or boxplot (also known as box and whisker plot) is a type of chart often used in explanatory data analysis. Box plots visually show the distribution of numerical data and skewness through displaying the data quartiles (or percentiles) and averages.
Step 2:
To sketch a boxplot, you will need to determine the following:
Minimum
Lower quartile
Median
Upper quartile
Maximum
Step 3:
USA
First arrange the data from the least to the greatest.
14 , 26, 33, 34, 35, 38, 40, 41, 44, 46, 46, 49, 53, 66, 70.
Minimum = 14
Median = 41
Maximum = 70
Interquartile range IQR = 49 - 34 = 15
Canada
22, 28, 31, 31, 35, 35, 36, 39, 40, 40, 42, 49, 53, 63, 68
Minimum = 22
Median = 39
Maximum = 68
Interquartile range = 49 - 31 = 18
