()jonathan conducted a survey among random boys in his grade to learn their shoe sizes. he found that the mean shoe size of the sample was size 10 and the median was size 8. which statement is true based on the results of jonathan’s survey? 1.the average shoe size of the boys in his grade is 10. 2.the average shoe size of the boys in his grade is 8. 3.about half of the boys in his grade have a shoe size bigger than size 8. 4.about half of the boys in his grade have a shoe size smaller than size 10.

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?