Free Printable Accel. 7 Predictive Review #2

1.

What is the value of $-8 + 13$ ?

a)

$-21$

b)

$5$

c)

$-5$

d)

$21$

2.

Calculate $-6 \times 4$ .

a)

$-24$

b)

$24$

c)

$-10$

d)

$10$

3.

What is $\frac{3}{4} + \frac{1}{2}$ ?

a)

$\frac{4}{6}$

b)

$\frac{5}{4}$

c)

$\frac{5}{6}$

d)

$\frac{3}{2}$

4.

Simplify the expression: $3x + 2x - x$ .

a)

$4x$

b)

$5x$

c)

$2x$

d)

$6x$

5.

Which of the following is the simplified form of $7y - 2y + 5$ ?

a)

$9y + 5$

b)

$5y + 5$

c)

$7y + 5$

d)

$5y + 7$

6.

Add the linear expressions: $(4x + 3)$ and $(2x + 5)$ .

a)

$6x + 8$

b)

$2x + 8$

c)

$6x + 15$

d)

$8x + 8$

7.

What is $(7y + 2) - (3y + 5)$ ?

a)

$4y - 3$

b)

$10y - 3$

c)

$4y + 7$

d)

$10y + 7$

8.

Factor the linear expression $6x + 12$ .

a)

$2(x + 6)$

b)

$3(x + 4)$

c)

$6(x + 2)$

d)

$12(x + 0.5)$

9.

Which is the factored form of $9y - 15$ ?

a)

$3(y - 5)$

b)

$3(3y - 5)$

c)

$9(y - 15)$

d)

$3(y + 5)$

10.

Simplify: $2(x + 4) + 3(x - 2)$ .

a)

$5x + 2$

b)

$5x + 10$

c)

$5x - 2$

d)

$6x + 2$

11.

Combine: $5y - 3 + 2y + 7$ .

a)

$7y + 4$

b)

$7y + 10$

c)

$3y + 4$

d)

$7y - 10$

12.

A coin is flipped 50 times and lands on heads 28 times. What is the relative frequency of heads?

a)

$0.56$

b)

$0.50$

c)

$0.28$

d)

$0.72$

13.

If a die is rolled 60 times and lands on 4 exactly 10 times, what is the relative frequency of rolling a 4?

a)

$0.10$

b)

$0.16$

c)

$0.60$

d)

$0.20$

14.

Which event is more likely: drawing a red card from a deck of 52 cards (26 red cards) or drawing a heart (13 hearts)?

a)

Drawing a red card

b)

Drawing a heart

c)

Both are equally likely

d)

Cannot be determined

15.

If the probability of event A is $0.3$ and event B is $0.5$ , which event is more likely?

a)

Event A

b)

Event B

c)

Both are equally likely

d)

Cannot be determined

16.

A survey is conducted only among students in the chess club to find the favorite school activity. Is this sample biased or unbiased?

a)

Biased

b)

Unbiased

c)

Both

d)

Neither

17.

Which of the following is an unbiased sample?

a)

Surveying only basketball players about favorite sports

b)

Surveying every 10th student from the school roster

c)

Surveying only students who eat lunch in the cafeteria

d)

Surveying only students in advanced math classes

18.

If 60% of a sample of students prefer pizza, predict how many out of 200 students would prefer pizza.

a)

$60$

b)

$120$

c)

$140$

d)

$80$

19.

Two samples of test scores have the following means: Sample A: $75$ , Sample B: $80$ . If their score ranges overlap from $70$ to $85$ , what does this suggest?

a)

The populations are completely different

b)

There is some similarity between the populations

c)

The populations are identical

d)

There is no overlap

20.

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

a)

thirty students who are often tardy

b)

thirty students who are rarely tardy

c)

thirty of her friends

d)

thirty randomly selected students from her school

21.

4. Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

a)

A. Biased

b)

B. Unbiased

22.

Cheap and Fast gas station is conducting a consumer satisfaction survey. Which method of collecting data would most likely lead to a biased sample?

a)

interviewing every 5th customer to come into the station

b)

interviewing customers chosen at random by a computer at the checkout

c)

interviewing customers who call an 800 number posted on the customers' receipts

d)

interviewing every customer who comes into the station on a day of the week chosen at random out of a hat

23.

True or False: all samples lead to a good prediction about an entire population.

a)

True

b)

False

24.

3. A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

a)

Biased

b)

Unbiased

25.

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?

a)

No, it's a biased sample

b)

432

c)

304

d)

16

Accel. 7 Predictive Review #2

Total questions: 25

Worksheet time: 38mins

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