NAME DATE PERIOD Test, Form 3B - White Plains … _____ DATE _____ PERIOD _____ ... Vendor: Aptara...
Transcript of NAME DATE PERIOD Test, Form 3B - White Plains … _____ DATE _____ PERIOD _____ ... Vendor: Aptara...
NAME ___________________________________________________ DATE _____________________ PERIOD __________
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For Exercises 1–6, refer to the table. The table shows the ages of actors who starred in a successful television series.
Ages of Actors (yr)
44 10 24 35 29
28 29 18 50 23
24 26 8 34 20
24 25 29 15 30
1. Find the measures of center of the data.
2. Determine the appropriate measure of center a middle-aged actor could use to help convince a television show producer to hire him.
3. Find the measures of variability and any outliers for the data.
4. Explain what the measures of variability tell you about the data.
5. Find the mean absolute deviation for the data set. Round to the nearest tenth.
6. Describe what the mean absolute deviation represents.
For Exercises 7 and 8, use the double box plot that shows student test scores for two classrooms.
40 50 60 70 80 10090
Room 14
Room 12
Test Scores
7. Which class had a greater range of scores?
8. Write an inference you can make about the populations.
9. The manager of a recycling center wants to know how many of his customers recycle their batteries. After calling and surveying every fifteenth customer listed in his files, he finds that 46% of them recycle their batteries. He concludes that about half of his customers recycle their batteries. Is this conclusion valid? Justify your answer.
Test, Form 3B
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mean: 26.25; median: 25.5; mode: 24 and 29
none of them
R: 42; M: 25.5; Q1: 21.5; Q3: 29.5; IR: 8; outliers: 8, 44, 50
See Answer Key.
7.2
Sample answer: The average distance between the mean age of a TV series actor and the actual age is about 7 years.
Room 12
See Answer Key.
yes; Sample answer: The conclusion is valid since he used an unbiased random sample.
Program: Pre-Algebra
Vendor: Aptara
Component: C10_CT
Grade: AMPDF_Pages
254 Math Accelerated • Chapter 10 Statistics and Probability
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NAME ___________________________________________________ DATE _____________________ PERIOD __________
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.Test, Form 3B (continued)
10. A survey in one middle school showed that 2 out of 9 students helpcook meals at home. Predict the number of students that help cook meals at home if there are 774 students in the school.
11. One of the five equal sections of a spinner is blue. The spinner landed on the blue section 20 of the 85 times that it was spun. Compare the theoretical probability of the spinner landing on blue to the experimental probability.
12. A co-ed softball team consists of 5 males and 9 females. How many males should be added to the team so that the probability of randomly choosing a male player from the team is about 65%?
13. An interior decorator needs to buy bedroom furniture for a model home. She plans to select one item each from 7 dressers, 4 beds, 6 lamps, and 9 night tables. Find the total number of outcomes.
14. A basket contains red, green, and yellow peppers. A pepper is selected at random. If P(red) = 3 − 5 and P(yellow) = 1 − 4 , what is P(green)?
15. The experimental probability of a quarter landing on heads is 3 − 5 . If the quarter landed on tails 36 times, how many times was the coin tossed?
16. An auto dealership is handing out one coupon per customer worth 5%, 10%, or 20% off the purchase of a new car. Each coupon is equally likely to be handed out. Describe a model that could be used to simulate this situation.
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172 students
theoretical probability (20%) < experimental probability (24%)
12 males
1512 possible outcomes
3
− 20
90 times
See students’ work.
Program: Pre-Algebra
Vendor: Aptara
Component: C10_CT
Grade: AMPDF_Pages
Math Accelerated • Chapter 10 Statistics and Probability 255
244_255_AM_C10_CT_664446.indd Page 255 13/08/12 4:52 PM u-s010244_255_AM_C10_CT_664446.indd Page 255 13/08/12 4:52 PM u-s010 /Volumes/104/GO01101_del/Accelerated_Maths_2014/PRE_ALGEBRA.../Volumes/104/GO01101_del/Accelerated_Maths_2014/PRE_ALGEBRA...