Statistics is the science of conducting studies to: a) solve a system of equatio
ID: 3292595 • Letter: S
Question
Statistics is the science of conducting studies to: a) solve a system of equations b) hypothesize, experiment and form conclusions c) collect organize, summarize, analyze and draw conclusions from data d) monitor, study and report on a subject. Which of the following statements correctly describes the relationship between a sample and a population? a) A sample is a group of populations that are subject to observation. b) A population is a group of samples that may or may not be included in a study. c) A sample is a group of subjects selected from a population to be studied. d) A population and a sample are not related. What would be the boundaries on the average age for high school graduates if they are reported to be 18 year old? a) 17.5 - 18.5 years old b) 17.5 - 19.5 years old c) 17.6 - 18.6 years old d) 17.5 - 19 years old The amount of time needed to run the Boston marathon is an example of which type of variable? a) discrete b) categorical c) continuous d) none of the above What is the midpoint of the class 13.5 - 17.3? a) 13.4 b) 15.4 c) I7.3 d) 14.3 Use the following histogram to answer #6 and #7. Find the class with the least number of data values. a) 70 b) 90 c) 60 d) 40 Find the class with the greatest number of data values. a) 70 b) 90 c) 60 d) 40 Given the following frequency distribution, how many pieces of data were less than 28.5? a) 12 b) 9 c) 25 d) 17 Find the median for the following data: 6, 7, 4, 3, 5, 7, 4 a) 3 b) 4 c) 5 d) 7 Find the z score for each student and choose the correct statement. Art major x = 46 x = 50 s = 5 Theater major x = 70 x = 75 s = 7 a) The an major has a higher score than the theater major. b) The theater major has a higher score than the an major. c) Both students have the same score. d) Neither student scored a positive score, therefore the relatively higher score cannot be determined. Choose the correct statement describing the following stem-and-leaf plot for grades on a linear algebra exam. a) The range of the grades is between 98 and 23. b) Of the 29 students who took the exam, 9 of them scored between 80 and 89. c) There are no gaps in the data. d) The data is bimodal. Given the following box plot where m is the median value, what statement could be made about the distribution of the data? a) The distribution is approximately symmetric. b) The distribution is positively skewed. c) The distribution is negatively skewed. d) No statements can be made about the data because no data values are shown on the plot. Given an ordinary deck of cards, what is the probability that a single drawn card would be an ace? a) 1/52 b) 1/13 c) 1/26 d) 1/4 A gum ball 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 only three balls are removed from the machine? a) 0.0264 b) 0.0531 c) 0.0348 d) 0.0482 A recent poll by the American Automobile Club found that 30% of those surveyed are worried about aggressive drivers on the road. If 3 people are selected at random what is the probability that all 3 will be worried about aggressive drivers on the road? a) 0.900 b) 0.027 c) 0.081 d) 0.300 If one card it drawn from an ordinary deck of cards, what is the probability that the card will be an ace, a king of hearts, or a spade? a) 19/52 b) 9/26 c) 17/52 d) 11/26 Give the mean of the following probability distribution. x 1 2 3 4 5 P (x) 0.2 0.1 0.35 0.05 0.3 a) 1.20 b) 1.46 c) 3.15 d) 2.13 What is the standard deviation of the following probability distribution? x 0 2 4 6 8 P (x) 0.2 0.05 0.35 0.25 0.15 a) 4.2 b) 4.7 c) 5.4 d) 2.6Explanation / Answer
Please post 1 qustion per post.
#6)
the class that has the least number of data values is :90
the distribution which has least height has the least frequency
b.) 90
#7)
the class with the highest number of data values is the one with the highest frequency.
the answer is therefore 60
c.) 60