quiz decision science

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Statistics

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Apr 3, 2024

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Deleting the grid lines in a table and the horizontal lines in a chart -increases the data-ink ratio. A quantity of interest that can take on different values is known as a(n) -variable The correlation coefficient will always take values -between –1 and +1. DJ needs to display data over time. Which of the following charts should he use? -Line chart Which one of the following is used in predictive analytics? -Linear regression Compute the relative frequencies for the data given in the table below:   Grades Number of students A 16 B 28 C 33 D 13 Total 90 0.18, 0.31, 0.37, 0.14 A manager of a fast food restaurant wants the drive-thru employee to ask every fifth customer if he or she is satisfied with the service. Who makes up the population? -All customers who use the drive-thru window of this fast food restaurant Natalie needs to compare the number of employees by job title for the last five years. Which of the following charts should Natalie use?
-Clustered column chart A _____________ is a graphical presentation of the relationship between two quantitative variables. -scatter chart What is the mode of the data set given below? 35, 47, 65, 47, 22 --47 Compute the 50th percentile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22 ---15.5 One of the 4 Vs of big data that refers to uncertainty due to data inconsistency and incompleteness, ambiguities, latency, deception, and model approximations is -Veracity A two-dimensional graph representing the data using different shades of color to indicate magnitude is called a -heat map. A sample of 13 adult males’ heights are listed below. 70, 72, 71, 70, 69, 73, 69, 68, 70, 71, 67, 71, 74
Find the range of the data. --7 A summary of data that shows the number of observations in each of several nonoverlapping bins is called a(n) -frequency distribution Which of the following is a discrete random variable? -The number of times a student guesses the answers to questions on a certain test Given that P(A) = 0.3, P(A | B) = 0.4, and P(B) = 0.5, compute P(A and B). -0.2 Which of the following statements is correct? -The binomial distribution is a discrete probability distribution and the normal distribution is a continuous probability distribution. A game at an arcade is in the form of a large wheel that a player spins. The wheel is programmed to give 2 tickets 50% of the time, 5 tickets 25% of the time, 10 tickets 23% of the time, and 100 tickets 2% of the time. If a player spins the wheel once, what is the expected number of tickets the player will win? -6.55 Participants at the state fair were given eight rings to toss. The number x of rings tossed onto a stick can be approximated by the probability distribution in the table. Use the probability distribution to find the mean of the probability distribution. 0 0.01
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