: Reviewing the material discussed in class and making use of the class module, answer the following problems, remember you must present how you arrive at the results, each exercise has an assigned value.

1. Find: mode, mean by fx and fd, the median, the population variance and the population SD of the following exercise, you must find the CI to solve the exercise and be able to answer. (15 pts)

class interval frecuency M P

8 32

12 37

15 42

25 47

10 52

9 57

4 62

Average: Median: Mode

2. Value 11 pts. The owner of Pets'R Us is interested in building a new store. It will be constructed if the average number of animals sold during the first 6 months of the year 2021 is at least 300 and if the global monthly average for the year is at least 285. The data for 2021 are as follows:

January 234, February 216, March 195, April 400, May 315, June 274, July 302, August 291, September 275, October 300, November 375, December 450

What decision does the owner make and why?

3. Value 20 pts -Dave's store has a notice: "If our average prices are not the same or lower than others, you get it for free." One of Dave's customers went to the store one day and posted sales notes for six items that he bought from a competitor for an average price lower than Dave's. Items cost.

$ 1.29$ 2.97$ 3.49$ 5.00 $ 7.50$ 10.95

Daves' prices for the same six items are $ 2.35, $ 2.89, $ 3.19, $ 4.98, $ 7.59, and $ 11.50. Dave's explained to the customer: "My ad refers to a weighted average of these items, our average is lower because our sales of these items have been:

79128 63

Find the average of Dave's and the competitor's prices, and find the weighted average of Dave's sales and the weighted average of his competitor's sales.

Does Dave look for a problem or does he solve it by talking about weighted averages?

5. Value 8 pts. Chile Care Community Nursery is eligible to receive resources from a special state fund for social services, provided that the average age of its children is less than nine years old. If the data below represents the age of the children who normally attend the center, will the center qualify for support from the center?

85 9109 127121378