A company announced a \"1000 Chips Trial,\" claiming that every 18-ounce bag of

Question

A company announced a "1000 Chips Trial," claiming that every 18-ounce bag of its cookies contained at least 1000 chocolate chips. Students purchased random bags of cookies from different stores and counted the number of chips irn each bag. Some of the data is shown below. Complete parts (a) through (c) belovw 1048 1210 1158 1226 1160 1352 1217 1314 1248 1404 a) Check the assumptions and conditions for inference Check the data for independence. Choose the correct answer below 0 A. The data are from a random sample, so one can assume that they are not independent. O B. The data are from a random sample, so one can assume that they are independent. ° C. The sample is less than 10% of the population, so one can assume that the data are independent. 0 D. The sample is less than 10% of the population, so one can assume that the data are not independent. Construct a histogram of the data. Choose the correct graph below A. 700 1400 900 1600 900 1600 Chips Chips Chips

Explanation / Answer

Solution

(a) Option (b) the data are from random sample,so one can assume they are independent

Option (c) (as the frequency is 1,2,4,2,1 with class 1000-1100 to 1400-1500)

option (a) the graph is unimodal and symmetric with no outliers so one can assume that data come from a polulation that follows Normal.

(b) 95% CI = (1233.7 +- 2.262(103.385/100.5) = (1159.7,1307.7)

(c) option (c) CI is above 1000

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