All Matches
Solution Library
Expert Answer
Textbooks
Search Textbook questions, tutors and Books
Oops, something went wrong!
Change your search query and then try again
Toggle navigation
FREE Trial
S
Books
FREE
Tutors
Study Help
Expert Questions
Accounting
General Management
Mathematics
Finance
Organizational Behaviour
Law
Physics
Operating System
Management Leadership
Sociology
Programming
Marketing
Database
Computer Network
Economics
Textbooks Solutions
Accounting
Managerial Accounting
Management Leadership
Cost Accounting
Statistics
Business Law
Corporate Finance
Finance
Economics
Auditing
Ask a Question
Search
Search
Sign In
Register
study help
mathematics
fundamentals of statistics
Questions and Answers of
Fundamentals of Statistics
Evaluate each expression.6!2!/4!
Suppose that P(E and F) = 0.35 and P(F) = 0.7. What is P(E/F)?
Which of the following numbers could be the probability of an event?0, 0.01, 0.35, -0.4, 1,1.4
Evaluate each expression.7P3
During the 2014 season, the Los Angeles Dodgers won 58% of their games. Assuming that the outcomes of the baseball games are independent and that the percentage of wins this season will be the same
Evaluate each expression.9C4
In the game of Jumble, the letters of a word are scrambled. The player must form the correct word. In a recent game in a local newspaper, the Jumble “word” was LINCEY. How many different
The U.S. Senate Appropriations Committee has 29 members and a subcommittee is to be formed by randomly selecting 5 of its members. How many different committees could be formed?
Suppose that you toss a coin 100 times and get 95 heads and five tails. Based on these results, what is the estimated probability that the next flip results in a head?
Suppose that you roll a die 100 times and get six 80 times. Based on these results, what is the estimated probability that the next roll results in six?
Find the value of each permutation.8P3
Bob is asked to construct a probability model for rolling a pair of fair dice. He lists the outcomes as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. Because there are 11 outcomes, he reasoned, the probability
In a survey of 500 randomly selected Americans, it was determined that 22 play soccer. What is the probability that a randomly selected American plays soccer?
A survey distributed at the 28th Lunar and Planetary Science Conference in March 1997 asked respondents to estimate the chance that there was life on Mars. The median response was a 57% chance of
Find the value of each permutation.9P4
A person can have one of four blood types: A, B, AB, or O. If a person is randomly selected, is the probability they have blood type A equal to 1/4 ? Why?
Find the value of each combination.8C3
Suppose that E and F are two events and that P(E and F) = 0.21 and P(E) = 0.4. What is P(F/E)?
Which type of compound event is generally associated with multiplication? Which is generally associated with addition?
True or False: In a probability model, the sum of the probabilities of all outcomes must equal 1.
The sample space be S = {Chris, Adam, Elaine, Brian, Jason}. Suppose that the outcomes are equally likely.Compute the probability of the event E = {Chris or Elaine}.
Suppose that E and F are two events and that P(E and F) = 0.6 and P(E) = 0.8. What is P(F/E)?
What method of assigning probabilities to a simple event uses relative frequencies?
What does it mean for an event to be unusual? Why should the cutoff for identifying unusual events not always be 0.05?
The sample space be S = {Chris, Adam, Elaine, Brian, Jason}. Suppose that the outcomes are equally likely.Compute the probability of the event E = {Jason}.
If P(E) = 0.6 and P(E/F) = 0.34, are events E and F independent?
What does it mean when two events are disjoint?
What is the probability of an event that is impossible? Suppose that a probability is approximated to be zero based on empirical results. Does this mean the event is impossible?
Which among the following numbers could be the probability of an event?0.23, 0, 3/2, 3/4, -1.32.
The notation P(F/E) means the probability of event ................given event..................
Suppose that two variables, X and Y, are negatively associated. Does this mean that above-average values of X will always be associated with below-average values of Y? Explain.
Explain the difference between correlation and causation. When is it appropriate to state that the correlation implies causation?
Write a paragraph that explains the concept of correlation. Include a discussion of the role that xi – x̅ and yi – y̅ play in the computation.
In a study published in the Journal of the American Medical Association, researchers found that the length of time a mother breast-feeds is negatively associated with the likelihood a child is obese.
What does it mean if r = 0?
Explain what each point on the least-squares regression line represents.
The following scatter diagram drawn in Stat Crunch shows the relation between percent of the population with at least a bachelors degree in a state and birthrate (births per 1000 women 15
The scatter diagram drawn in Minitab shows the relation between the percentage of the population of a state plus Washington, DC, that has at least a bachelors degree and the median income
Determine whether the scatter diagram indicates that a linear relation may exist between the two variables. If the relation is linear, determine whether it indicates a positive or negative
(a) By hand, draw a scatter diagram treating x as the explanatory variable and y as the response variable.(b) Select two points from the scatter diagram and find the equation of the line containing
Determine whether the scatter diagram indicates that a linear relation may exist between the two variables. If the relation is linear, determine whether it indicates a positive or negative
Determine whether the scatter diagram indicates that a linear relation may exist between the two variables. If the relation is linear, determine whether it indicates a positive or negative
If the slope of a least-squares regression line is negative, what could be said about the correlation between the explanatory and response variable?
True or False: Correlation implies causation.
What would you say about a set of quantitative bivariate data whose linear correlation coefficient is -1? What would a scatter diagram of the data look like?
A _______ variable is a variable that is related to both the explanatory and response variable.
True or False: If the linear correlation coefficient is close to 0, then the two variables have no relation.
If r = _______, then a perfect negative linear relation exists between the two quantitative variables.
A researcher collects data regarding the percent of all births to unmarried women and the number of violent crimes for the 50 states and Washington, DC. The scatter diagram along with the
The following data represent the speed of a car (in miles per hour) and its braking distance (feet) on dry asphalt. Is the relation between speed and braking distance linear? Why?Speed
Explain the idea behind Simpson’s Paradox.
True or False: The least-squares regression line always travels through the point x̅, y̅..
Explain why we use the term association rather than correlation when describing the relation between two variables in this section.
If the linear correlation between two variables is negative, what can be said about the slope of the regression line?
Total deviation = _____ deviation + _____ deviation.
The difference between the observed and predicted value of y is the error, or ________.
The _____ _____ _____, R2, measures the proportion of total variation in the response variable that is explained by the least squares regression line.
What is the difference between univariate data and bivariate data?
Develop a sample of size n = 8 such that x = 15 and s = 0.
What makes the range less desirable than the standard deviation as a measure of dispersion?
What does it mean when a statistic is biased?
Are any of the measures of dispersion mentioned in this section resistant? Explain.
Match the histograms in the next column to the summary statistics given. Standard Deviation Mean Median 53 1.8 53 60 П 60 11 53 53 III 10 53 53 IV 22 20 - 10 10 32 42 52 62 72 82 48 50 52 54 56 (a)
In January 2016, the mean amount of money lost per visitor to a local riverboat casino was $135. Do you think the median was more than, less than, or equal to this amount? Why?
A researcher with the Department of Energy wants to determine the mean natural gas bill of households throughout the United States. He knows the mean natural gas bill of households for each state, so
Explain the advantage of using z-scores to compare observations from two different data sets.
Mensa is an organization designed for people of high intelligence. One qualifies for Mensa if one’s intelligence is measured at or above the 98th percentile. Explain what this means.
When outliers are discovered, should they always be removed from the data set before further analysis?
Suppose you received the highest score on an exam. Your friend scored the second-highest score, yet you both were in the 99th percentile. How can this be?
Write a paragraph that explains the meaning of percentiles.
Which box plot likely has the data with a larger standard deviation? Why?I.II. + 5 25 + 30 10 15 20
Explain how the standard deviation measures dispersion. In your explanation, include a discussion of deviation about the mean.
Answer the following based on the histograms shown below. (a) Which measure of central tendency would you recommend reporting for the data whose histogram is shown in Figure I? Why?(b) Which one has
The distribution of income tends to be skewed to the right. Suppose you are running for a congressional seat and wish to portray that the average income in your district is low. Which measure of
According to the National Center for Health Statistics, a 10-year-old male whose height is 53.5 inches has a height that is at the 15th percentile. Explain what this means.
According to the National Center for Health Statistics, a 19-year-old female whose height is 67.1 inches has a height that is at the 85th percentile. Explain what this means.
True or False: A data set will always have exactly one mode.
The ................... is the range of the middle 50% of the observations in a data set.
A histogram of a set of data indicates that the distribution of the data is skewed right. Which measure of central tendency will likely be larger, the mean or the median? Why?
..................... divide data sets into fourths.
The ........................ of a data set is a value such that k percent of the observations are less than or equal to the value.
The Federal Bureau of Investigation classifies various larcenies. The data in the next column represent the type of larcenies based on a random sample of 15 larcenies. What is the mode type of
The ....................... represents the number of standard deviations an observation is from the mean.
What does it mean if a statistic is resistant?
The following graph appears on the Wikipedia website. The intention of the graph is to display the ages of U.S. presidents on Inauguration Day. Explain any problems you see with the graph. 14 ill. 12
What type of variable is required when drawing time-series plots? What is the purpose behind drawing a time-series plot?
Describe the situations in which it is preferable to use relative frequencies over frequencies when summarizing quantitative data?
Why shouldn’t classes overlap when summarizing continuous data in a frequency or relative frequency distribution?
Nielsen/NetRatings measures the amount of time an individual spends viewing a specific web page. The following data represent the amount of time, in seconds, a random sample of 40 individuals spent
The following data represent the number of grams of fat in breakfast meals offered at McDonalds.(a) construct a stem-and-leaf plot and(b) describe the shape of the distribution. 27 25 30
Use the data in Problem 24. What percentage of earthquakes registered 4.0 to 4.9? What percentage of earthquakes registered 4.9 or less?(a) A relative frequency distribution,(b) A frequency
What does it mean if a distribution is said to be “skewed left”?
Fill in the blanks.1. The categories by which data are grouped are called ________________ .2. The ___________ class limit is the smallest value within the class and the class limit is the largest
Consider the information in the chart shown below, which is in the USA Today style of graph. Could the information provided be organized into a pie chart? Why or why not? Why we can't lose weight 63%
When should relative frequencies be used when comparing two data sets? Why?
The following table lists the presidents of the United States (as of May, 2016) and their state of birth.(a) Construct a frequency bar graph for state of birth.(b) Which state has yielded the most
A frequency distribution lists the __________ of occurrences of each category of data, while a relative frequency distribution lists the __________ of occurrences of each category of data.
Define raw data in your own words?
In the 2015 NCAA Football Championship Game, quarterback Cardale Jones completed 70% of his passes for a total of 242 yards?Determine whether the underlined value is a parameter or a statistic.
Brand name of a pair of running shoesClassify the variable as qualitative or quantitative. If the variable is quantitative, state whether it is discrete or continuous.
Showing 200 - 300
of 361
1
2
3
4