Statistics Problem Solving

The mean of the number of sales of cars over a 6-month period is 91, and the standard deviation is 10. Compute for the coefficient of variation.

Use two decimal places for the answer

Compute for the sample size wherein the total population is 1000

• 283

• 285

• 286

• 287

Mark wants to know his average grade. His grades for a total of 9 subjects are 96, 87, 85, 91, 93, 85, 87, 88, and 87. What is his average grade?

• 87.73

• 88.00

• 88.78

• 89

DATA: 2, 3, 5, 6, 8, 10, 12, 15, 18, 20.

Find the corresponding value for the 75th percentile.

DATA: 572 572 573 568 569 575 565 570

Compute for the sample mean.

• 570.50

• 571

• 571.50

• 572

Which number from a data with 21 samples corresponds to the 7th decile?

• 16th

• 17th

• 18th

• 19th

23, 19, 33, 21, 17, 26, 22, 26, 29, 34

Compute the range of the mentioned data.

If the donations from the residents of Fairway Forest toward Virginia Lung Association are recorded as 9, 10, 8, 9, 8, 8, 6, 10 and 11 dollars. What is the mode?

DATA: 1.9, 2.1, 2.3, 2.5, 2.6, 2.9, 3.0, 3.1, and 3.4.

Compute for the median.

Compute for the value corresponding the upper quartile.

• 12

• 15

• 18

• 20