Problem-Solving and Data Analysis

Chief Editor

Mar 27, 2024

Take all 3 MCQs in interactive quiz mode with timer and progress tracking

The mean amount of time that the 20 employees of a construction company have worked for the company is 6.7 years. After one of the employees leaves the company, the mean amount of time that the remaining employees have worked for the company is reduced to 6.25 years. How many years did the employee who left the company work for the company?

Difficulty: Hard

0.45

2.30

9.00

15.25

Food Protein Cost 1 large egg 6 grams $0.36 1 cup of milk 8 grams $0.24 The table above shows the amount of protein in two foods and the cost of each food. Based on the table, what is the ratio of the cost per gram of protein in a large egg to the cost per gram of protein in a cup of milk?

Food	Protein	Cost
1 large egg	6 grams	$0.36
1 cup of milk	8 grams	$0.24

Difficulty: Medium

1 : 2

2 : 3

3 : 4

2 : 1

A psychologist designed and conducted a study to determine whether playing a certain educational game increases middle school students' accuracy in adding fractions. For the study, the psychologist chose a random sample of 35 students from all of the students at one of the middle schools in a large city. The psychologist found that students who played the game showed significant improvement in accuracy when adding fractions. What is the largest group to which the results of the study can be generalized?

Difficulty: Hard

The 35 students in the sample

All students at the school

All middle school students in the city

All students in the city