1

A small bakery records the number of cakes sold each day for a week: 15, 18, 20, 16, 19, 22, and 17. Calculate the Mean Absolute Deviation (MAD) of the number of cakes sold.

A) 1.69 cakes

B) 1.88 cakes

C) 1.77 cakes

D) 1.63 cakes

2

Calculate the Mean Absolute Deviation (MAD) for the sample weights (in grams) measured in a chemical reaction: 52.3, 54.1, 51.8, 53.5, 55.2, 50.9, 56.3, 54.9, 51.6, and 53.2.

A) 1.53 grams

B) 1.45 grams

C) 1.42 grams

D) 1.525 grams

3

Calculate the Mean Absolute Deviation (MAD) for the daily sales (in dollars) recorded over a year: $1200, $1300, $1100, $1400, $1500, $1250, $1350, $1450, $1200, $1300, $1100, and $1400.

A) $104.17

B) $119.67

C) $114.89

D) $108.56

4

Andrew earned the following scores on his five tests for the semester: 83, 75, 90, 92, and 85. What is the standard deviation of these scores? Round your answer to the nearest hundredth.

A) 3.91

B) 6.34

C) 4.59

D) 5.97

5

Calculate the standard deviation of Jane’s recent basketball game scores: 15, 17, 12, 15, 18, and 22. Round your answer to the nearest tenth.

A) 2.67

B) 4.51

C) 3.1

D) 5.03

6

What is the range of the number set within one standard deviation, given a mean of 4 and a standard deviation of 3.5?

A) 3.5 to 4

B) 0.5 to 4.7

C) 1.5 to 6.8

D) 0.5 to 7.5

7

If a shirt originally costs $40 and is now being sold at a 25% discount, what is the sale price?

A) $35

B) $30

C) $40

D) $45

8

Sarah scored 80% on her math test, which had 50 questions. How many questions did she answer correctly?

A) 40

B) 50

C) 60

D) 70

9

A company had 500 employees last year, and this year they hired 100 more employees. What is the percentage increase in the number of employees?

A) 45%

B) 10%

C) 35%

D) 20%

10

If a recipe calls for 3 cups of flour and you only have 2 cups, what percentage of the flour do you need to buy?

A) 43.33%

B) 25%

C) 33.33%

D) 30%