Math 302 quiz 4 Study guides, Class notes & Summaries
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MATH 302| STATISTICS| WEEK 4 QUIZ WITH ANSWER KEY| 2024
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MATH 302| STATISTICS| WEEK 4 QUIZ WITH ANSWER 
KEY| 2024 
Part 1 of 6 - Calculations of Probabilities Questions 3.0/ 3.0 Points 
Question 1 of 20 
1.0/ 1.0 Points 
A dishwasher has a mean life of 11.5 years with an estimated standard deviation of 1.5 years ("Appliance 
life expectancy," 2013). Assume the life of a dishwasher is normally distributed. Find the number of years 
that the bottom 10% of dishwasher would last. Round answer to 2 decimal places. Answer: 
9.58 
Answer Key:9.58 
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MATH 302| STATISTICS| WEEK 4 QUIZ WITH ANSWER KEY| 2024
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MATH 302| STATISTICS| WEEK 4 QUIZ WITH ANSWER KEY| 2024
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MATH 302| STATISTICS| WEEK 4 QUIZ WITH ANSWER KEY| 2024
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MATH 302| STATISTICS| WEEK 4 QUIZ WITH ANSWER KEY| 2024
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MATH 302| STATISTICS| WEEK 3 QUIZ WITH ANSWER KEY| 2024
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MATH 302| STATISTICS| WEEK 3 QUIZ WITH ANSWER KEY| 2024 
If random variable X has a binomial distribution with n =10 and P(success) =p =0.2, find the probability 
that X is less than 6. (That is, find P(X<6) Answer: (round to 4 decimal places) 
Answer Key:0.9936|.9936 
P(x < 6) = P(x is less than or equal to 5), in Excel 
=BINOM.DIST(5,10,0.2,TRUE) 
Approximately 8% of all people have blue eyes. Out of a random sample of 20 people, what is the 
probability that at most 2 of them have blue ...
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MATH 302 QUIZ 2 – QUESTION AND ANSWERS SET 1
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MATH 302 QUIZ 2 – QUESTION AND ANSWERS SET 1 
 
Part 1 of 6 -	5.0/ 5.0 Points 
 
 
Question 1 of 20	1.0/ 1.0 Points 
 
A gumball machine contains 300 grape flavored balls, 400 cherry flavored balls, and 500 lemon flavored balls. What is the probability of getting 1 grape ball, 1 cherry ball, and 1 lemon ball if each ball was removed and then replaced before choosing the next from the machine? 
A.0.0264 B.0.0531 C.0.0347 D.0.0482 
 
Answer Key: C 
 
Question 2 of 20	1.0/ 1.0 Points 
 
The numbe...
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MATH 302 Quiz 4 – Question And Answers Set 2
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MATH 302 Quiz 4 – Question And Answers Set 2
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MATH 302 Quiz 3 - Question and Answers
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MATH 302 Quiz 3 - Question and 
Answers 
Find the area under the standard normal distribution to the left of z = -1.05. Round answer to 4 
decimal places. Answer: .2299 
Answer Key:0.1469|.1469 
Feedback: 
In Excel, 
=NORM.S.DIST(-1.05,TRUE) 
Question 2 of 20 
1.0/ 1.0 Points 
Find P(-1.96 ≤ Z ≤ 1.96). Round answer to 2 decimal places. Answer: .95 
Answer Key:0.95|.95 
Feedback: 
In Excel, 
=NORM.S.DIST(1.96,TRUE)-NORM.S.DIST(-1.96,TRUE) 
Question 3 of 20 
1.0/ 1.0 Points 
Find P(1.31 &l...
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MATH 302 Quiz 1 - Question and Answers
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MATH 302 Quiz 1 
 
Part 1 of 3 
1. A histogram that is positively skewed is also called 
2. Researchers may gain insight into the characteristics of a population by examining a 
3. A variable is classified as ordinal if: 
4. A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from the sample mean is: 
5. A pareto chart does NOT have which of the following properties? 
6. What type of graph is the figure below? 
7. Numerical variables can be subdivided i...
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MATH 302 Quiz 1 Set 1
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MATH 302 Quiz 1 
1. An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of 
2. A scatterplot allows one to see: 
3. Which of the following are the two most commonly used measures of variability? 
4. A histogram that has a single peak and looks approximately the same to the left and right of the peak is called: 
5. What kind of relationship between x and y is demonstrated by the scatter plot below? 
6. Which of the following statements is true re...
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MATH 302 QUIZ 4 – QUESTION AND ANSWERS SET 2 | MATH 302 QUIZ 4 WEEK 4 KNOWLEDGE CHECK – QUESTION AND ANSWERS | AMERICAN PUBLIC UNIVERSITY
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MATH 302 QUIZ 4 – QUESTION AND ANSWERS SET 2 | MATH 302 QUIZ 4 WEEK 4 KNOWLEDGE CHECK – QUESTION AND ANSWERS | AMERICAN PUBLIC UNIVERSITY