5. [0/4 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The typical amount of sleep per night for undergraduate college students has an approximately normal distribution with a mean of 7 and a standard deviation of 1.90 hours. Based on this distributional information we can conclude that about 99.7% of this population sleep between x hours per night. x and Show My Work (Optional) → Submit Answer 6. [2/8 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER CHIPOTLE What do people actually order at Chipotle? How healthy is a normal Chipotle meal? Chipotle and other relatively new fast casual chains like Shake Shack, Potbelly and Five Guys typically promote themselves as having healthier menu choices than the traditional fast food outlets like McDonald's, Taco Bell, Burger King, etc. The recommended daily calorie intake for most adults is 1,600 to 2,400. The histogram below shows the calories in approximately 3,000 meals ordered from Chipotle on Grubhub. N Many bumitos and bunto bowls end up with 900 to 1,000 calories SADE This small bump is mostly from sides of chips and guacamole About 2 per had more th calories While the histogram is not perfectly symmetric (there is mild right skewness), it is close enough to being symmetric and bell-shaped to justify using the 68-95-99.7 rule. Suppose the distribution of calories in a Chipotle meal can be considered symmetric and bell-shaped with mean 1079 calories and standard deviation 300 calories. Use the 68-95-99.7 rule to answer the following questions. a. What is the approximate percentage of the Chipotle meals that have between 479 and 1679 calories? * % b. The middle 99.7% of Chipotle meals have between xcalories? x calories and 9. [0/8 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Suppose that the mean weight for men 18 to 25 years old is 172 pounds, and the standard deviation is 23 pounds. Assume that the weight for men 18 to 25 follows a normal distribution. In each part below, find the value of the z-score for the given weight. Round your answer to 2 decimal places. (a) 205 pounds. z = (b) 143 pounds. z = (c) 180 pounds. z= (d) 240 pounds. z = Show My Work (Optional) → MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 10. [1/5 Points] DETAILS PREVIOUS ANSWERS Suppose that two graduating seniors, one a marketing major and one an accounting major, are comparing job offers. The accounting major has an offer for $45,000 per year, and the marketing student has an offer for $43,000 per year. Summary information about the distribution of salary offers for each major follows: Accounting: mean $46,000 standard deviation - $1,300 Marketing: mean -$42,500 standard deviation $1,100 For problems A and B calculate the appropriate z scores rounded to one decimal place. A) The z-score for the accounting major is: B) The z-score for the marketing major is: