Solutions for Statistics
Problem 6UP:
1.7 Explain how populations and variables differ.
Problem 7UP:
1.8 Explain how populations and samples differ.
Problem 9UP:
1.10 Why would a statistician consider an inference incomplete without an accompanying measure of...Problem 10UP:
1.12 Define statistical thinking.
Problem 11UP:
1.13 Suppose you’re given a data set that classifies each sample unit into one of four categories:...Problem 1.1AE:
Applet Exercise 1.1
1. The Random Numbers applet generates a list of n random numbers from 1 to N,...Problem 1.2AE:
The Random Numbers applet can be used to select a random sample from a population, but can it be...Problem 12ACB:
College application. Colleges and universities are requiring an increasing amount of information...Problem 13ACB:
STEM experiences for girls. The National Science Foundation (NSF) promotes girls’ participation in...Problem 14ACB:
Drafting NFL quarterbacks. The Journal of Productivity Analysis (Vol. 35, 2011) published a study of...Problem 15ACB:
Ground motion of earthquakes. In the Journal of Earthquake Engineering (Nov. 2004), a team of civil...Problem 16ACB:
Sprint speed training. The Sport Journal (Winter 2004) reported on a study of a speed-training...Problem 17ACB:
Corrosion prevention of buried steel structures. Engineers have designed tests on underground steel...Problem 18ACB:
Student GPAs. Consider the set of all students enrolled in your statistics course this term. Suppose...Problem 19ACB:
Medicinal value of plants. Sea buckthorn (Hippophae), a plant that typically grows at high altitudes...Problem 20ACB:
Extinct birds. Biologists at the University of California (Riverside) are studying the patterns of...Problem 21ACB:
Study of quality of drinking water. Disasters (Vol. 28, 2004) published a study of the effects of a...Problem 22ACI:
Annual survey of computer crimes. The Computer Security Institute (CSI) conducts an annual survey of...Problem 23ACI:
1.21 Treasury deficit prior to the Civil War. In Civil War History (June 2009), historian Jane...Problem 24ACI:
Satellite database. The Union for Concerned Scientists (UCS) maintains the Satellite Database—a...Problem 26ACI:
1.28 Corporate sustainability and firm characteristics. Corporate sustainability refers to business...Problem 27ACI:
CT scanning for lung cancer. A new type of screening for lung cancer, computed tomography (CT), has...Problem 28ACI:
Zillow.com estimates of home values. Zillow.com is a real estate Web site that provides free...Problem 29ACI:
Massage vs. rest in boxing. Does a massage enable the muscles of tired athletes to recover from...Problem 30ACI:
Insomnia and education. Is insomnia related to education Status? Researchers at the Universities of...Problem 31ACI:
Guilt in decision making. The effect of the emotion of guilt on how a decision maker focuses on a...Problem 32ACA:
Can money spent on gifts buy love? Is the gift you purchased for that special someone really...Problem 33ACA:
Dating and disclosure. As an adolescent, did you voluntarily disclose information about dating and...Problem 34ACA:
Jersey City drug market study. An article in the Journal of Quantitative Criminology (Mar. 2014)...Browse All Chapters of This Textbook
Chapter 1 - Statistics, Data, And Statistical ThinkingChapter 2 - Methods For Describing Sets Of DataChapter 2.1 - Describing Qualitative DataChapter 2.2 - Graphical Methods For Describing Quantitative DataChapter 2.3 - Numerical Measures Of Central TendencyChapter 2.4 - Numerical Measures Of VariabilityChapter 2.5 - Using The Mean And Standard Deviation To Describe DataChapter 2.6 - Numerical Measures Of Relative StandingChapter 2.7 - Methods For Detecting Outliers: Box Plots And Z-scoresChapter 2.8 - Graphing Bivariate Relationships (optional)
Chapter 2.9 - Distorting The Truth With Descriptive TechniquesChapter 3 - ProbabilityChapter 3.1 - Events, Sample Spaces, And ProbabilityChapter 3.4 - The Additive Rule And Mutually Exclusive EventsChapter 3.6 - The Multiplicative Rule And Independent EventsChapter 3.7 - Some Additional Counting Rules (optional)Chapter 3.8 - Bayes's RuleChapter 4 - Discrete Random VariablesChapter 4.1 - Two Types Of Random VariablesChapter 4.2 - Probability Distributions For Discrete Random VariablesChapter 4.3 - Expected Values Of Discrete Random VariablesChapter 4.4 - The Binomial DistributionChapter 4.5 - The Poisson Random Variable (optional)Chapter 4.6 - The Hypergeometric Random Variable (optional)Chapter 5 - Continuous Random VariablesChapter 5.2 - The Uniform DistributionChapter 5.3 - The Normal DistributionChapter 5.4 - Descriptive Methods For Assessing NormalityChapter 5.5 - Approximating A Binomial Distribution With A Normal Distribution (optional)Chapter 5.6 - The Exponential Distribution (optional)Chapter 6 - Sampling DistributionsChapter 6.1 - The Concept Of A Sampling DistributionChapter 6.2 - Properties Of Sampling Distributions: Unbiasedness And Minimum VarianceChapter 6.3 - The Sampling Distribution Of The Sample Mean And The Central Limit TheoremChapter 6.4 - The Sampling Distribution Of The Sample ProportionChapter 7 - Inferences Based On A Single Sample: Estimation With Confidence IntervalsChapter 7.2 - Confidence Interval For A Population Mean: Normal (z) StatisticChapter 7.3 - Confidence Interval For A Population Mean: Student's T-statisticChapter 7.4 - Large-sample Confidence Interval For A Population ProportionChapter 7.5 - Determining The Sample SizeChapter 7.6 - Confidence Interval For A Population VarianceChapter 8 - Inferences Based On A Single Sample: Tests Of HypothesesChapter 8.2 - Formulating Hypotheses And Setting Up The Rejection RegionChapter 8.3 - Observed Significance Levels: P-valuesChapter 8.4 - Test Of Hypothesis About A Population Mean: Normal (z) StatisticChapter 8.5 - Test Of Hypothesis About A Population Mean: Student's T-statisticChapter 8.6 - Large-sample Test Of Hypothesis About A Population ProportionChapter 8.7 - Calculating Type Ii Error Probabilities: More About β (optional)Chapter 8.8 - Test Of Hypothesis About A Population Variance (optional)Chapter 9 - Inferences Based On Two Samples: Confidence Intervals And Tests Of HypothesesChapter 9.2 - Comparing Two Population Means: Independent SamplingChapter 9.3 - Comparing Two Population Means: Paired Difference ExperimentsChapter 9.4 - Comparing Two Population Proportions: Independent SamplingChapter 9.5 - Determining The Required Sample SizeChapter 9.6 - Comparing Two Population Variances: Independent SamplingChapter 10 - Analysis Of Variance: Comparing More Than Two MeansChapter 10.1 - Elements Of A Designed ExperimentChapter 10.2 - The Completely Randomized Design: Single FactorChapter 10.3 - Multiple Comparisons Of MeansChapter 10.4 - The Randomized Block DesignChapter 10.5 - Factorial Experiments: Two FactorsChapter 11 - Simple Linear RegressionChapter 11.1 - Probabilistic ModelsChapter 11.2 - Fitting The Model: The Least Squares ApproachChapter 11.3 - Model AssumptionsChapter 11.4 - Assessing The Utility Of The Model: Making Inferences About The SlopeChapter 11.5 - The Coefficients Of Correlation And DeterminationChapter 11.6 - Using The Model For Estimation And PredictionChapter 11.7 - A Complete ExampleChapter 12 - Multiple Regression And Model BuildingChapter 12.3 - Evaluating Overall Model UtilityChapter 12.4 - Using The Model For Estimation And PredictionChapter 12.5 - Interaction ModelsChapter 12.6 - Quadratic And Other Higher-order ModelsChapter 12.7 - Qualitative (dummy) Variable ModelsChapter 12.8 - Models With Both Quantitative And Qualitative VariablesChapter 12.9 - Comparing Nested ModelsChapter 12.10 - Stepwise RegressionChapter 12.12 - Some Pitfalls: Estimability, Multicollinearity, And ExtrapolationChapter 13 - Categorical Data AnalysisChapter 13.2 - Testing Categorical Probabilities: One-way TableChapter 13.3 - Testing Categorical Probabilities: Two-way (contingency)tableChapter 14 - Nonparametric Statistics (available Online)Chapter 14.2 - Single Population InferencesChapter 14.3 - Comparing Two Populations: Independent SamplesChapter 14.4 - Comparing Two Populations: Paired Difference ExperimentChapter 14.5 - Comparing Three Or More Populations: Completely Randomized DesignChapter 14.6 - Comparing Three Or More Populations: Randomized Block DesignChapter 14.7 - Rank Correlation
Sample Solutions for this Textbook
We offer sample solutions for Statistics homework problems. See examples below:
Statistics: Statistics is defined as the ‘science of data’, which deals with collection,...Variability: Measure of variability infers the amount of dispersion in the dataset, it defines the...Event A denotes that the Team T wins the World Series next year and event B denotes that Person E...The random variable is “The length of time that an exercise physiologist’s program takes to elevate...Calculation: The distribution of the random variable X is, f(x)=e−x77 , (x>0) Exponential...Sampling distribution of x¯: When a random sample of size n is selected from a population that is...The statement is “We are 95% confident that the proportion of all PCs with a computer virus falls...Under null hypothesis the probability of getting the test statistic as extreme as observed is...For the z-statistic of the difference of two means to be valid, the following assumptions are...
Difference between one way ANOVA and two way ANOVA: One way ANOVA is used to test the significant...Difference between a probabilistic model and a deterministic model: Probabilistic model: The...Calculation: In general for a model relating to E(y) one qualitative independent variable with k...It is given that if the null hypothesis is rejected then there is a causal relationship between the...Nonparametric tests: When the distribution of population is not known or when the population...
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