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In: Statistics and Probability

5. It is of interest to Starbucks on campus, the average spending of students in one...

5. It is of interest to Starbucks on campus, the average spending of students in one week, this with the aim of creating a promotion for their students. It is said that they spend 163 pesos on average and it is known from experience that the standard deviation in spending is 52 pesos. a. What is the probability of a student on campus spending at least 180 pesos?

6. The following are the partial ratings of the group: 79, 87, 90, 74, 83, 72, 80, 56, 84, 83, 92, 70, 65, 69, 87, 88, 74, 72, 82, 91, 63. a. Draw up a basic frequency distribution table (1 pts.) b with the grades. Make a histogram

Solutions

Expert Solution

(5)

Z score normal distribution socre:

z = (x - μ) / σ

z = (180-163)/52 = 0.33

P(Z < 0.33) = 0.6293

(6)

Formula Reference:

orchestra answered 1 year ago
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