subject
Mathematics, 04.06.2021 17:50 brooklynpage3930

Assignment Students will complete the assignment with all procedure, using the formula.
At the mall every day, thousands of people pass through security on one of two levels: level C or level D. Suppose that, on average, it takes people 20 minutes to pass through security on level A with a standard deviation of 8.5 minutes to pass through security on level A. On level B, the mean and standard deviation are 18 and 6 minutes, respectively.
Each day, the mall looks at separate random samples of 200 people from each level. They calculate the mean time for each sample, then look at the difference between the sample means (XA-XB)

For boys, the average number of absences in the first grade is 15 with a standard deviation of 7; for girls, the average number of absences is 10 with a standard deviation of 6. Find the mean difference in the population and find the standard deviation of the difference. Sample for boys is 100 and girls is 50.

ansver
Answers: 1

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 15:10, blessing5266
Aline on the wall and a line on the floor are skew. always, sometimes, or never?
Answers: 3
image
Mathematics, 21.06.2019 15:40, hannahkharel2
What is a rational number between 9.5 and 9.7
Answers: 3
image
Mathematics, 21.06.2019 17:00, jessezarate4513
Can anyone me with 32,33,36,37,and 40.
Answers: 1
image
Mathematics, 21.06.2019 18:00, Gattuso
Manny bought 12 pounds of vegetables at the supermarket. 75% of the vegetables were on sale. how many pounds of vegetables were not on sale? 98 points : )
Answers: 2
You know the right answer?
Assignment Students will complete the assignment with all procedure, using the formula.
At th...

Questions in other subjects:

Konu
Mathematics, 16.10.2020 04:01
Konu
Arts, 16.10.2020 04:01