A waitress believes the distribution of her tips has a model that is slightly skewed to the right, with a mean of $9.60 and a standard deviation of $5.20. She usually waits on about 50 parties over a weekend of work. a) Estimate the probability that she will earn at least $600. b) How much does she earn on the best 1% of such weekends? a) P(tips from 50 parties > $600) = (Round to four decimal places as needed.) 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. 1038 1100 1133 1237 1231 1207 1287 1304 1307 1411 D. The data are from a random sample, so one can assume that they are independent. Construct a histogram of the data. Choose the correct graph below. O A. O B. &C. 5- Bags Bags Bags of of 700 1400 900 1600 900 1600 Chips Chips Chips Evaluate the histogram. Choose the correct answer below. A. 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. 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 unimodal and asymmetric, so one can assume that the data come from a population that follows a t-Student's model. O D. 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. b) Create a 95% confidence interval for the average number of chips. ()chips (Round to one decimal place as needed.)