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Q. The percentage of people who own at most three tshirt costing more than $19 each is approximately: a. 21 b. 59 c. 41 d. cannot be determined 10. If the data were collected by asking the rst 111 people who entered the store, then the type of sampling is a, cluster to. simple random c. stratied d. convenience 11. Forty randomly.r selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows: a. Find the sample mean {it} h. Find the sample standard deviation (5} c. Find the quartiles (rst, second. third) Frequency 12 12