) A simple random sample of 1000 voters is taken in order to determine the chances of a certain candidate winning an election. Is this study REPRESENTATIVE? or NON-REPRESENTATIVE?

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: In two-way ANOVA, identify the statistic that is used as a measure of variationa. among the sample…

A: (a)Sum of squares for factor A:The component SSA represents the variation among the sample means for…

Q: The test is used to test hypotheses associated with enumerated, categorized data. This test is used…

A: The objective is to determine the appropriate test, which involves enumerated categorized data.…

Q: Because of safety considerations, in May 2003, the Federal Aviation Administration (FAA) changed its…

A: Given information: x¯summer=183x¯winter=190nsummer=100=nwinterssummer=21swinter=24 a)…

Q: Find the test statistic for this hypothesis test. z= (Round to two decimal places as needed.)

A:

Q: A chi-square goodness-of-fit test using a significance level of a = 0.05 was conducted to…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: If a population has a mean of 2.5, what is the mean of the sampling distribution if the sample size…

A: Introduction: It is required to find the mean of sampling distribution of the mean, when a sample of…

Q: An SMR over 100% ( i.e.,171 %) indicates that the "healthy worker effect" may be an issue in the…

A: Given::- An SMR over 100% (i.e., 171%) indicates that the "healthy worker effect" may be an issue in…

Q: What statistical tool is appropriate if the number of data is large and O is known?

A: Here we need to find out the statistical tool if the number of data is large and standard deviation…

Q: A company executive claims that employees in his industry get 100 junk emails per day. To further…

A: Given Information: Consider the given dataset: 125, 101, 109, 94, 122, 92, 119, 90, 118, 122. The…

Q: A shareholders group is lodging a protest against your company. The shareholders group claimed that…

A: Test - stats (t) = x¯-μsn

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: f a research study reports a very borderline significance level, just a very small amount outside of…

A:

Q: What is the difference between using a population or using a sample to carry out a statistical study

A: A statistical population is a collection of individuals from which to draw statistical inferences,…

Q: A university professor believes that some of his students are struggling in the class due to a large…

A: Here A university professor want to analyse the relation between 2 variables , one is number of…

Q: Identify two statistical methods other than a census for obtaining information.

A:

Q: If a population has a mean of 3.5, what is the mean of the sampling distribution if the sample size…

A: Given,sample size(n)=4population mean(μ)=3.5

Q: What is the distribution of a statistic based on a population parameter?

A: Population Parameter It is a characteristic of the entire population. The value of a population…

Q: Consider the analysis questions of describing parents’ attitudes towards immunization, what the…

A:

Q: 3) The management of an amusement park wanted to determine the amount of waiting time for the park's…

A: Answer can be given by using the formulas for mean, median, mode and midrange.

Q: Social networking is becoming more and more popular around the world. Pew Research Center used a…

A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of adults using social networking…

Q: (d) Suppose that the union decides to perform another statistical test using the same population,…

A: This question is related to hypothesis testing and probability of committing a Type II error. The…

Q: Consider the following scenario: you want to investigate the relationship between the number of…

A: Here we want to see if there is a relationship between 'likes' on Facebook and 'number of friends'…

Q: Pooling (i.e. combining) two cross sectional datasets leads to an increase in sample size. True…

A:

Q: A report by the Gallup Poll found that a woman visits her doctor, on average, at most 5.8 times each…

A: When the given sample size is less than 30 we use t-test as a test statistic. Using t-test we can…

Q: 5. A researcher uses a matched samples design to investigate whether people who own pets are…

A:

Q: A social science study has been started in order to obtain information about the possible…

A: Given information: Level of significanceα=0.05 Random sample(N)=93 a) Descriptive statistics:…

Q: A report provided the following information on the sex of smartphone users for representative…

A: Chi-square distribution : A probability density function that, among other things, has the property…

Q: ou want to run an ANOVA looking at the effect of attending review sessions on students’ statistics…

A: In repeated measures ANOVA we take many observations of one single unit. For example marks in…

Q: A power analysis is a calculation used to estimate the smallest sample size needed for an…

A: 1)It is impossible to overstate the value of power analysis in an experiment. It is a vital tool for…

Q: Anterior cruciate ligament (ACL) injuries occur most frequently in planting and cutting sports such…

A: Independent samples: Two samples are said to be independent of each other when values of one sample…

Q: An unbiased sample is a good representation of the population. True or False

A: Population is the set of all objects of interest. Sample is s subset of the population. It is not…

Q: In analyzing the data, a researcher notes that as employee absences increase, scores on performance…

A: Given,  A researcher notes that as employee absences increase, scores on performance evaluations…

Q: - How do you know if a sample is significant different from the population mean? In other words,…

A: Let μ be the population mean of the sample we are taking and μ0 be the hypothesised population mean…

Q: IS IT REASONABLE TO ASSUME THIS SAMPLE CAME FROM A NORMAL POPULATION?

A: we need to answer, if it is reasonable to assume the given sample came from a normal population.

Q: A shareholders' group is lodging a protest against your company. The shareholders group claimed that…

A: From the given information, Sample size n =62 the Sample mean, x̅ =9.3 years the Sample standard…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.