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 in each bag. Some of the data is shown below. Complete parts (a) through (c) below. 1012 1117 1154 1212 1283 1226 1243 1346 1393 1477 Construct a histogram of the data. Choose the correct graph below. OB. Bags Bags Bags 1600 1400 e 900 1600 C Chips Chips Chips Evaluate the histogram. Choose the correct answer below. O A. The histogram is roughly unimodal and asymmetric, so one can assume that the data come from a population that follows a t-Student's model. O B. The histogram is roughly bimodal and symmetric, with no outliers, so one can assume that the data come from a population that follows a Normal model. O C. The histogram is roughly bimodal and asymmetric, so one can assume that the data come from a population that follows a t-Student's model. D. The histogram is roughly unimodal and symmetric, with no outliers, so one can assume that the data come from a population that follows a Normal model. b) Create a 95% confidence interval for the average number of chips. (O ) chips

Only need help with part B please.

Answer 1

Solution Given, 1012 1112 1154 1346 1212 1393 1283 1477 1226 1843 b) Sample size = 10=n mean = 12u6.3 Standard deviation = s= 129.5237816 degree of freedom - df = n1 = 100 = 9 2 -0.05 tn-1,4 = too.05 = 2.2621572 ast. c. I ich x tn-listhe sustatnich 5 - = 1246.3- 2.2621572x2 129.5238 Jio s uc 12.46.3 2.2621579 x 1 - 1153.6442 s us 1338-9558 Interpretation: we can be 95% confident that the true average number of chips is between 1153.64 and 1338 95