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2) Suppose you work for the Cheapo Coffee company and are tasked with studying their coffee shops around the country. You are interested in studying the number of cups of coffees sold per day at different Cheapo Coffee Shops. To study this you get a list of all Cheapo Coffee Shops in the US and randomly select 18 shops to visit. On the day you visit you record how many cups of coffee each shop sold. (Note: each value is the number of cups of coffee sold at the shop that day):
39, 48, 57, 60, 65, 73, 84, 90, 107, 138, 145, 156, 208, 232, 273, 298, 343, 406 (a) What is the population in this question?
(b) What is the sample in this question?
(c) What is an individual in this question?
(d) What sampling technique was used to build this sample?
(e) Calculate the mean, median and standard deviation for this data set. Make sure to give units.
(f) Give the five number summary for this data set. Make sure to give units.
(g) Use the IQR outlier check to determine if there are any outliers in this data set.
(h) Construct a histogram with class size 70 starting at 0 for this data. Describe the shape.
(i) What percent of the shops in your sample sold less than 300 cups of coffee on the day you visited?

Sagot :

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