WorksheetsChapter 2 Review
Total questions: 15
Worksheet time: 4hrs 45mins
The following data set represents Mrs. Poto’s students' scores on the final. If you got a 90 on the final, what percentile does that place you in?
66, 69, 71, 71, 72, 73.5, 74, 74, 76.5, 76.5, 77.5, 78, 81
81, 85, 86, 86, 86, 87, 87.5, 88.5, 89, 90, 92, 92,100
56th Percentile
85th Percentile
92nd Percentile
70th Percentile
Your class' scores on a recent quiz was listed on the board:
55, 56, 57, 58, 59, 60, 60, 61, 63, 65, 69,
71, 78, 78, 79, 79, 82, 82, 83, 83
Calculate the percentile of a student that scored a 59
30th Percentile
20th Percentile
25th Percentile
50th Percentile
What percentile would a student who scored a 33 be in?
20th Percentile
10th Percentile
24th Percentile
12th Percentile
The grades on a Government test are roughly symmetric and had a mean of 72 and a standard deviation of 2. A randomly selected student scored a 75. Find the z-score for this students test grade.
1.5
1
2
1.25
A hot chocolate mix has a mean sugar content of 20g with a standard deviation of 6g. A randomly selected hot chocolate had a z-score of -0.75. What is the sugar content of this drink?
16g
6g
15.5g
13.5g
The average temperature for all the days preceding the last for the month of February was 55 degrees Fahrenheit, with a standard deviation of 5 degrees. On the last day, the temperature was 73 degrees F. What is the z-score for the temperature on the last day?
2.8
1.7
3.6
3
What Percent of the Density Curve is below 40?
94.24%
97.72%
15.43%
87.24%
Find the area between the following:
z = -1.25 and z = 0.74
0.543
0.770
0.665
0.894
What component of a density curve is false?
The area under the curve is always 1
Is always on or above the horizontal axis
Approximately 90% fall within 2 standard deviations of the mean for a Normal distribution graph
The median is the place where the areas under the curve are equal on both sides
Kitchen appliances don’t last forever. The lifespan of all refrigerators sold is approximately Normally distributed with a mean of 14 years and a standard deviation of 4. What percentage of refrigerators last more than 15 years?
40.13%
59.87%
78.39%
21.60%
Which of the following properties is true for all Normal density curves?
They are symmetric
The area underneath is NEVER 1
95% of the area under the curve is within 2 standard deviations of the mean.
The Curve Reaches its peak at the mean
Which of these graphs are approximately Normal w/ a positive correlation?
Five friends took a 10 question multiple choice quiz in class. Their raw scores on the quiz are shown in the dot plot below along with summary statistics.
The teacher told everyone that she would add 1 point to every student's score as extra credit. What is the new class mean for the quiz grades?
5
11
9
8
Mrs. Fitzgerald rents a stall in a mall where she sells antiques. She earns a mean revenue of $500 per month with a standard deviation of $125. Her stall and new inventory costs her $225 per month and are her only costs. She calculates her profits using the above formula.
What will be the mean and standard deviation of the distribution of Mrs. Fitzgerald's profits?
Mean: $275
SD: $125
Mean: $275
SD: $350
Mean: $500
SD: $125
Mean: $500
SD: $350
The cargo loads that Annie transports in her truck have a mean weight of 42,000 lb with a standard deviation of 1,500 lb.
What will be the mean and standard deviation of the distribution of weights in kilograms?
(1lb approx = 0.45 kg)
Mean: 42,000 kg
SD: 675 kg
Mean: 18,900 kg
SD: $1,500 kg
18,900 kg
SD: 675 kg
Mean: 42,000 kg
SD: 1,500 kg
