In Lee Middle School, the ratio of the number of fifth-graders to the number of sixth-graders is 5 to 4, and there are 15 more fifth-graders. If the ratio of the number of sixth-graders to the number of seventh-graders is 4 to 5, what is the mean number of students in the three grades? Your Answer:

Suppose that 10 students have taken an exam and that the mean and median scores are both 60. (Since 10 is an even number you can assume that two scores in the middle are both 60.) Two more students take it and one scores 70 and the other scores 26. If these students are now included, what is the new mean? What is the new median?

A congressperson wants to come up with a single value to describe the prices of homes in their district. However, their district consists of a few homes that are extremely expensive compared to the others. Which descriptive statistic should they use? a. Range b. Mode c. Median d. Mean

A professor has twelve students in her class. Her class took a test with the following results: 73, 55, 72, 98, 77, 93, 58, 78, 79, 95, 96, 86 a. What was the mean grade on the test? (Simplify your answer and round to one decimal place.) b. What was the median grade on the test? (Simplify your answer and round to one decimal place.) C c. What was the mode? If there are no modes, enter “NONE”. Otherwise, enter the mode (or modes, separated by a comma). Mode(s) = $ Mean = 5 4 I Median = JO D f V % 5 t 6.0 b 6 Oll y h & 7 n u - * 00 8 m ( 9 k S O n L O A р alt 7 + [ // ctri

Is the number two in the sentence a statistic or a perimeter? Two students out of all 29 students in a class have red hair.

What is the mean of .27, .63, .45, .25, .31, 1.15, .64, 1.33, 1.14, 0.41, 0.47

In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean score on test Number of ninth graders Glenwood 76 272 Central City 93 325 Lincoln High 73 180 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 80.7 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place.mean of all ninth grader's scores =

4. There are 35 students in a class. Fifteen of them are men and 20 of them are women. The mean height of the men is 69.65 inches, and the mean height of all 35 students is 67.18 inches. What is the mean height of the women?

Maria D to peop. vns and manages a small business in San Francisco, California. The business provides breakfast and brunch food, via carts parked along sidewalks, he business district of the city. Being an experienced businessperson, Maria provides incentives for the four salespeople operating the food carts. This year, she plans to offer monetary bonuses to her salespeople based on their individual mean daily sales. Below is a chart giving a summary of the information that Maria has to work with. (In the chart, a "sample" is a collection of daily sales figures, in dollars, from this past year for a particular salesperson.) Sample Sample Sample size Groups mean variance Salesperson 1 108 209.6 2334.6 Salesperson 2 62 206.2 2597.4 Salesperson 3 116 220.0 1913.2 Salesperson 4 120 225.4 2540.4 Send data to calculator Send data to Excel Maria's first step is to decide if there are any significant differences in the mean daily sales of her salespeople. (If there are no significant…

The mean of 5 numbers is 20. If one number is excluded their mean is 15. Then the excluded number is O a. 20 Ob. O b. 40 О с. 5 O d. 10