Math 302 quiz 4 set 3 Study guides, Class notes & Summaries

MATH 302 Quiz 1 Part 1 of 3 A histogram that is positively skewed is also called Researchers may gain insight into the characteristics of a population by examining a A variable is classified as ordinal if: A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from the sample mean is: A pareto chart does NOT have which of the following properties? What type of graph is the figure below? Numerical variables can be subdivided into which two types? ...

MATH 302 QUIZ 1 – QUESTION AND ANSWERS – SET 1 Question 1 of 20 1.0 / 1.0 Points An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of • A. detached statistics • B. suspect samples • C. changing the subject • D. ambiguous averages Answer Key: A Question 2 of 20 0.0 / 1.0 Points A scatterplot allows one to see: • A. whether there is any relationship between two variabl...

MATH 302 MIDTERM EXAM – QUESTION AND ANSWERS – SET 3 MATH 302 MIDTERM EXAM – QUESTION AND ANSWERS – SET 3 Part 1 of 9 - 1.0/ 1.0 Points Question 1 of 25 1.0/ 1.0 Points Given the following boxplot where m is the median value, what statement could be made about the distribution of the data? A. The distribution is negatively skewed. B. The distribution is positively skewed. C. The distribution is approximately symmetric. D. No statement can be made ...

MATH 302 QUIZ 2 – QUESTION AND ANSWERS – SET 2 Question 1 of 20 1.0/ 1.0 Points The probability of an event and the probability of its complement always sum to: A. 0 B. any value between 0 and 1 C. any positive value D. 1.0 Answer Key: D Question 2 of 20 1.0/ 1.0 Points A jar contains four white marbles, five red marbles, and six black marbles. If a marble is selected at random, find the probability that it is white or black . A. 2/15 B. 2/3 ...

MATH 302 QUIZ 1 – QUESTION AND ANSWERS – SET 1 Question 1 of 20 1.0 / 1.0 Points An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of • A. detached statistics • B. suspect samples • C. changing the subject • D. ambiguous averages Answer Key: A Question 2 of 20 0.0 / 1.0 Points A scatterplot allows one to see: • A. whether there is any relationship between two variabl...

MATH 302 Quiz 4 Set 4 – Question and Answers PART 1 OF 3 A manufacturer of flashlight batteries took a sample of 13 batteries from a day’s production and used them continuously until they failed to work. The life lengths of the batteries, in hours, until they failed were: 342, 426, 317, 545, 264, 451, 1049, 631, 512, 266, 492, 562, and 298. The null and alternative hypotheses divide all possibilities into: Results from previous studies showed 79% of all high school seniors from a cert...

MATH 302 QUIZ 1 – QUESTION AND ANSWERS – SET 4 Part 1 of 3 - 7.0/ 12.0 Points Question 1 of 20 1.0/ 1.0 Points What type of sampling is being employed if the population is divided into economic classes and a sample is chosen from each economic class to be surveyed? A. random sampling B. cluster sampling C. stratified sampling D. systematic sampling Answer Key: C Question 2 of 20 0.0/ 1.0 Points Which of the following statistics is not a mea...

MATH 302 QUIZ 5 – QUESTION AND ANSWERS – SET 2 Part 1 of 8 - 3.0/ 3.0 Points Question 1 of 17 1.0/ 1.0 Points A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Assume α = 0.05. What is the test value? Women Men Sample size 50 80 Mean effect 7 6.95 Sample variance 3 4 • A. z = 0.455 ...

MATH 302 MIDTERM EXAM – QUESTION AND ANSWERS – SET 3 Part 1 of 9 - 1.0/ 1.0 Points Question 1 of 25 1.0/ 1.0 Points Given the following boxplot where m is the median value, what statement could be made about the distribution of the data? A. The distribution is negatively skewed. B. The distribution is positively skewed. C. The distribution is approximately symmetric. D. No statement can be made about the data because no data values are shown on the plo...

Math 302 Quiz 2 Question 1 of 20 1. The probability of an event and the probability of its complement always sum to: 2. A jar contains four white marbles, five red marbles, and six black marbles. If a marble is selected at random, find the probability that it is white or black . 3. If two events are independent, what is the probability that they both occur? 4. If two events are mutually exclusive, what is the probability that one or the other occurs? 5. What type of probability uses sa...