# pre algebra part 2

I’m working on a Algebra exercise and need support.

## Question 1 (5 points)

Prices for the salad bar at some local restaurants are \$8.95, \$6.50, \$12.25, \$9.90, \$11.00, \$8.95, \$10.75, and \$6.50. Find the mean, median, and mode.

Question 1 options:
 \$9.35, \$9.43, \$6.50 and \$8.95 \$9.35, \$10.45, no mode \$9.89, \$9.43, \$8.95 \$9.89, \$10.45, \$6.50, and \$8.95

## Question 2 (5 points)

The spinner shown at right is spun once. Determine the probability of each outcome. Express each probability as a fraction and as a percent. Then describe the likelihood of the event. Write impossible, unlikely, equally likely, likely, or certain.

P(odd)

Question 2 options:
 ; likely ; equally likely ; impossible ; certain

## Question 3 (5 points)

Identify the sample as biased or unbiased and describe its type.

Tia surveyed every third house in the locality to determine the number of people who own pets.

Question 3 options:
 unbiased, simple random sample biased, voluntary response sample unbiased, systematic random sample biased, convenience sample

## Question 4 (5 points)

Find the median of the following set of data. Round to the nearest tenth if necessary.

26.1, 8.4, 11.4, 44.1, 32.3, 46, 41, 18.5, 20, 9.3, 19.6

Question 4 options:
 32.3 20 26.1 25.2

## Question 5 (5 points)

Before starting a summer jobs program, the school board conducted a survey at various schools. They interviewed 30% of the high school students to know whether they would participate in the program. The results are shown in the graph.

Is this sampling method valid? If so, how many of 750 students of various high schools are likely to participate in this program?

Question 5 options:
 no, 125 yes, 125 no, 625 yes, 625

## Question 6 (5 points)

A number cube is tossed and the spinner below is spun. Find P(3 and C).

Question 6 options:

## Question 7 (5 points)

Matthew has 8 dimes and 10 quarters in a box. Find the probability of drawing a dime.

Question 7 options:

## Question 8 (5 points)

In baseball, Shintaro had 4 hits in his last 12 times at bat.

If Shintaro has 36 at bats in the next week, about how many hits will he have?

Question 8 options:
 24 12 10 9

## Question 9 (5 points)

Find the mean of each set of data. Round to the nearest tenth if necessary.

14, 39, 27, 17, 17, 25, 10, 37

Question 9 options:
 23.3 21.3 24.8 21

## Question 10 (5 points)

The table shows the number of campsite reservations at two different state parks over the past 10 weekends.

 Number of Campsite Reservations East Fork 32 36 39 39 43 45 50 51 56 80 Blue Ridge 38 40 45 47 51 52 60 62 69 73

Are there any outliers in the data for either state park?

Question 10 options:
 The data points 56 and 80 reservations are outliers for East Fork. The data point 38 reservations is an outlier for Blue Ridge. The data point 80 reservations is an outlier for East Fork. There are no outliers.

## Question 11 (5 points)

Find the range for the set of data.

101, 72, 115, 114, 117, 56, 101, 68, 111, 58, 51, 51, 90

Question 11 options:
 64 85 66 90

## Question 12 (5 points)

Find the probability.

A marble is randomly selected from a bag containing 15 black, 12 white, and 6 clear marbles. Find
P(not clear). Round to the nearest percent if necessary.

Question 12 options:
 18% 82% 64% 55%

## Question 13 (5 points)

Find the median, first quartile, third quartile, interquartile range, and any outliers for each set of data.

14.6, 28.1, 3.9, 7.1, 5.3, 30.9, 2.8, 6.5, 20.8, 16.4, 16.4, 27.1, 53.5, 12.5, 6.1

Question 13 options:
 median: 14.6, Q1: 6.1, Q3: 27.1, IR: 21, outliers: none median: 14.6, Q1: 6.1, Q3: 27.1, IR: 20, outliers: none median: 14.6, Q1: 6.1, Q3: 27.1, IR: 21, outliers: 2.8 median: 14.6, Q1: 6.1, Q3: 25.1, IR: 21, outliers: none

## Question 14 (5 points)

Nina’s quiz scores for the quarter are 90, 79, 5, 84, 95, 81, 87, and 94. Which measure of central tendency best represents the data shown in the table and why?

Question 14 options:
 Since the data have many repeated values, the mode best represents the data. Since there is an extreme value (5) and there are no big gaps in the middle of the data, the median best represents the data. Since there are no extreme values, the mean best represents the data. Since there are no extreme values and few repeated numbers, the median best represents the data.

## Question 15 (5 points)

The frequency table shows Sam’s record in swimming.

 Year Number of medals 2008 6 2009 4 2010 1 2012 7 2013 4

Based on this record, what is the probability of picking up a medal won by him in the years 2009 or 2012.

Question 15 options:
 2

## Question 16 (5 points)

Lionel is apartment hunting. He makes a table of prospective apartment choices.

 Apartment Rental Prices Apartment Choice Price per Month (\$) 1 630 2 755 3 675 4 765 5 690 6 680 7 675

Which measure of central tendency best represents the data shown in the table and why?

Question 16 options:
 Since the data is grouped close together, the mode best represents the data. Since there are no extreme values, the median best represents the data. Since there are no extreme values and few repeated numbers, the mean best represents the data. Since the value 675 occurs more than once, the mode best represents the data.

## Question 17 (5 points)

The table shows the number of points scored by each team in a tournament.

 Number of Points Scored 12 25 16 20 31 16 19 22

Find the mean absolute deviation of the number of points scored. Round to the nearest hundredth if necessary.

Question 17 options:
 4.41 16 20.13 35.26

## Question 18 (5 points)

Find the mode of each set of data.

33, 19, 15, 39, 39, 34, 24, 29

Question 18 options:
 31 29 32 39

## Question 19 (5 points)

Find the probability.

A bag of sweets contains 20 gummy bears and 35 orange slices. One sweet is taken at random from the bag. Find
P(gummy bear).

Question 19 options:

## Question 20 (5 points)

Find the median, first quartile, third quartile, interquartile range, and any outliers for each set of data.

111, 68, 93, 88, 74, 152, 119, 87, 88, 105, 84, 102, 151, 115, 112

Question 20 options:
 median: 102, Q1: 87, Q3: 113, IR: 28, outliers: none median: 102, Q1: 87, Q3: 115, IR: 28, outliers: 68 median: 102, Q1: 87, Q2: 115, IR: 28, outliers: none median: 102, Q1: 87, Q3: 115, IR: 27, outliers: none

pre algebra part 2

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