MAT 150 Graded_Exam2 Questions and Answers,100% CORRECT

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MAT 150 Graded_Exam2 Questions and Answers Question 1 Correct 4.60 points out of 4.60 Flag question Question text A dot plot is best applied for a data set with . Select one: a. 1... ,000 observations b. 50 observations c. More than one variable d. One mode Feedback The correct answer is: 50 observations Question 2 Correct 4.60 points out of 4.60 Flag question Question text Percentiles divide a distribution into . Select one: a. 2 equal parts b. 4 equal parts c. 10 equal parts d. 100 equal parts Feedback The correct answer is: 100 equal parts Question 3 Correct 4.60 points out of 4.60 Flag question Question text In a distribution, the second quartile corresponds with the . Select one: a. Mean b. Median c. Mode d. Variance Feedback The correct answer is: Median Question 4 Correct 4.60 points out of 4.60 Flag question Question text The interquartile range is graphically presented in a . Select one: a. Dot plot b. Stem-and-leaf display c. Box plot d. Contingency table Feedback The correct answer is: Box plot Question 5 Correct 4.60 points out of 4.60 Flag question Question text Using the following statistics to describe a distribution of data, what is the interquartile range? Minimum = 10 Q1 = 25 Median = 50 Q3 = 75 Maximum = 95 Select one: a. 85 b. 50 c. 15 d. 20 Feedback The correct answer is: 50 Question 6 Correct 4.60 points out of 4.60 Flag question Question text The following graph is a . Select one: a. Dot plot b. Stem-and-leaf diagram c. Box plot d. Contingency table Feedback The correct answer is: Dot plot Question 7 Correct 4.60 points out of 4.60 Flag question Question text If a student places in the 99th percentile on an exam, she performed better than 99% of all students who completed the exam. Her performance is similar to a statement based on a . Select one: a. Frequency table b. Cumulative frequency distribution c. Histogram d. Pie chart Feedback The correct answer is: Cumulative frequency distribution Question 8 Incorrect points out of 4.60 Remove flag Question text When the distance from the first quartile to the median is larger than the distance from the median to the third quartile, then the skewness of the distribution is Select one: a. Positively skewed. b. Symmetric c. Negatively skewed. d. Unknown Feedback The correct answer is: Negatively skewed. Question 9 Correct 4.60 points out of 4.60 Flag question Question text What is the possible range of values for Pearson's coefficient of skewness? Select one: a. -1 and +1 b. -3 and +3 c. 0% and 100% d. Unlimited values Feedback The correct answer is: -3 and +3 Question 10 Correct 4.60 points out of 4.60 Flag question Question text A large oil company is studying the number of gallons of gasoline purchased per customer at self-service pumps. The mean number of gallons is 10.0, with a standard deviation of 3.0 gallons. The median is 10.75 gallons. What is Pearson's coefficient of skewness in this instance? Select one: a. -1.00 b. -0.75 c. +0.75 d. +1.00 Feedback The correct answer is: -0.75 Question 11 Correct 4.60 points out of 4.60 Flag question Question text Pearson coefficient of skewness for symmetric distribution is Select one: a. Sk = -3 b. Sk = 3 c. Sk = 0 d. Sk = 1 e. Sk = –1 Feedback The correct answer is: Sk = 0 Question 12 Correct 4.60 points out of 4.60 Flag question Question text The range of the coefficient of skewness is . Select one: a. Values greater than or equal to zero or always positive b. Values less than or equal to zero or always negative c. Both positive and negative values d. Values between -1 and +1 Feedback The correct answer is: Both positive and negative values Question 13 Correct 4.60 points out of 4.60 Flag question Question text A contingency table would be used to summarize data such as . Select one: a. Company employees by gender and organizational title b. Company employees by gender and age c. Company employees by compensation and age d. Company employees by compensation and years with the company Feedback The correct answer is: Company employees by gender and organizational title Question 14 Correct 4.60 points out of 4.60 Flag question Question text There are 10 AAA batteries in a box and 3 are defective. Two batteries are selected without replacement. What is the probability of selecting a defective battery followed by another defective battery? Select one: a. ½ or 0.50 b. ¼ or 0.25 c. 1/120 or about 0.0083 d. 1/15 or about 0.07 Feedback The correct answer is: 1/15 or about 0.07 Question 15 Correct 4.60 points out of 4.60 Flag question Question text The National Center for Health Statistics reported that of every 883 deaths in recent years, 24 resulted from an automobile accident, 182 from cancer, and 333 from heart disease. What is the probability that a particular death is due to an automobile accident? Select one: a. 24/883 or 0.027 b. 539/883 or 0.610 c. 24/333 or 0.072 d. 182/883 or 0.206 Feedback The correct answer is: 24/883 or 0.027 Question 16 Correct 4.60 points out of 4.60 Flag question Question text If two events are independent, then their joint probability is computed with . Select one: a. The special rule of addition b. The special rule of multiplication c. The general rule of multiplication d. The Bayes theorem Feedback The correct answer is: The special rule of multiplication Question 17 Incorrect points out of 4.60 Flag question Question text When an experiment is conducted "without replacement," . Select one: a. Events are dependent b. Events are equally likely c. The experiment can be illustrated with a Venn diagram d. The probability of two or more events is computed as a joint probability Feedback The correct answer is: Events are dependent Question 18 Correct 4.60 points out of 4.60 Flag question Question text The probability of two or more events occurring concurrently is called a(n) . Select one: a. Conditional probability b. Empirical probability c. Joint probability d. Tree diagram Feedback The correct answer is: Joint probability Question 19 Correct 4.60 points out of 4.60 Flag question Question text If two events A and B are mutually exclusive, what does the special rule of addition state? Select one: a. P(A or B) = P(A) + P(B) b. P(A and B) = P(A) + P(B) c. P(A and/or B) = P(A) + P(B) d. P(A or B) = P(A) - P(B) Feedback The correct answer is: P(A or B) = P(A) + P(B) Question 20 Correct 4.60 points out of 4.60 Flag question Question text A sales representative calls on four hospitals in Westchester County. It is immaterial what order he calls on them. How many different arrangements can be made with the 4? Select one: a. 4 b. 24 c. 120 d. 37 Feedback The correct answer is: 24 Question 21 Incorrect points out of 4.60 Remove flag Question text A committee of 5 members is chosen from 8 men and 7 women. How many different committees can be formed? Select one: a. 77 b. 3003 c. 360 d. 1176 e. 280 Feedback The correct answer is: 3003 Question 22 Incorrect points out of 4.60 Remove flag Question text A bookshelf has room for four more books. Cindy has eight books that may be placed on the shelf. In how many ways can the books be placed? Select one: a. 70 b. 32 c. 1680 d. 3125 e. 120 Feedback The correct answer is: 1680 Question 23 Correct 4.60 points out of 4.60 Flag question Question text What does 6!2!4!3! equal? Select one: a. 640 b. 36 c. 10 d. 120 Feedback The correct answer is: 10 Question 24 Correct 4.60 points out of 4.60 Flag question Question text A multiple choice quiz contains 5 questions. Each question has answer choices labeled a, b, c, and d. How many different ways can a student answer the five questions? Select one: a. 20 b. 625 c. 1024 d. 120 e. 5 Feedback The correct answer is: 1024 Question 25 Correct 4.60 points out of 4.60 Flag question Question text How many permutations of the three letters C, D, and E are possible? Select one: a. 3 b. 0 c. 6 d. 8 Feedback The correct answer is: 6 [Show More]

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