You read an online article that claims that 62% of 8-year-olds have social media accounts.  You want to investigate that specific claim, so you set up a one-way chi square analysis and recruit 120 8-year-old participants for your sample.  What is the expected frequency for the number of 8-year-olds in your sample who have social media accounts?

Q: When looking to understand the Z score what does it actually mean in simple terms in comparison to…

A: The value of the z-score tells you how many standard deviations you are away from the mean. If a…

Q: An assembly line inspector is interested in determining if there is an equal proportion of “Type-A”…

A: Explanation: 1. Since, The inspector is interested in determining if there is an equal proportion of…

Q: The assumption of homogeneity of variances was tested by Levene’s Test, F(2, 432) = 4.61, p < .001.…

A: The hypothesis is, Null hypothesis: H0: The variances of groups are equal. Alternative hypothesis:…

Q: Provide an example (other than one discussed in the text) of a random variable that does not arise…

A: In this case, we need write the example of a random variable that does not arise from a quantitative…

Q: A quality control expert at LIFE batteries wants to test their new batteries. The design engineer…

A: The normal distribution is the most useful theoretical distribution for continuous variable.  For…

Q: ravelers who have no intention of showing up often fail to cancel their hotel reservations in a…

A:

Q: What is a Z score and why is it useful?

A:

Q: When the IV and DV are both numeric, which statistical test is most appropriate to use for…

A: Regression analysis is used to estimate the relationship between variables. There will be one…

Q: What percent of patients received pamidronate? What percent of patients experienced the occurrence…

A: Let us define some events A : patient receive pamidronate. B : patient experiences the occurrence of…

Q: For an ANOVA, when the null hypothesis is true, the F-ratio is balanced so that the numerator and…

A:

Q: If you were really a television network executive, you would not hire multiple market research firms…

A: Answer : Option (a) ✔️

Q: 1. Describe the sources of variability in a random experiment

A: If in each trial of an experiment conducted under identical conditions, the outcome is not unique,…

Q: Which is the most striking feature of a two-factor ANOVA?

A:

Q: How do you illustrate a normal random variable?

A: How do you illustrate a normal random variable?

Q: Two balanced coins are flipped. What is the variance of the number of heads observed?

A: For this case, the number of possible outcomes will be:  (HH), (HT), (TT), (TH) Here, H represents…

Q: Researchers are trying to determine if the prevalence of CVD is different in smokers compared to…

A: Here compare provenance of CVD BETWEEN non smoker and smokers

Q: (d) Construct the analysis of variance (ANOVA) table for testing the significance of the fitted line…

A: Part d. The analysis of the linear model    y=12.866+0.839 x  shows that the performance in both the…

Q: Comparing a census of a large population to a sample drawn from it we expect that the

A: We know, Sample is usually a more practical method of obtaining the desired information.

Q: What is the moment generating function of the sample mean?

A: Mgf (i)Sample mean=x⏞=Σxin=x1+x2+..+xn10…

Q: In order to investigate the relationship between mean job tenure in years among workers who have a…

A: Given information: Workers with bachelor's degrees: n1=155X¯1=5.2 yearss1=1.3 years Workers with no…

Q: For a one-way analysis of variance comparing four treatments, MSbetween = 12. What is the value of…

A: It is given that the number of treatment levels is 4 and MSbetween = 12.

Q: What are the criteria for an experiment to be a binomial experiment?

A: Let us consider the below example: A fair coin is flipped 10 times; X represents the number of…

Q: Question 1. In a random and independent sample of 1000 students 80% of them were in favor of longer…

A: The formula of the expected proportion is,

Q: When resampling data from two independent samples, what is the fundamental difference between…

A: Bootstrapping is basically a method of resampling a single dataset to generate a large number of…

Q: The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged…

A: The herpetologist ends up rejecting the null hypothesis. If the actual proportion of ridged…

Q: A study considered whether greater levels of television watching by teenagers were associated with a…

A: The z test are used to measure the mean significance between the two sample. It is used when the…

Q: at a 0.10 significance level?

A: No treatment  Fertilizer  Irrigation  Fertilizer and irrigation  1.212 0.939 0.069 0.852…

Q: The test statistic has value TS= . Testing at significance level α = 0.05, the rejection region is:…

A: Ans :  Null hypothesis H 0: \ µ = 720Another hypothesis Ha: \µ \≠ 720Sample means (X bar) =…

Q: Suppose that you have obtained data by taking a random sample from a population. Before performing a…

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Q: What does the term expected cell frequencies refer to?

A: question:

Q: TIME WASTED AT WORK? An employment survey at a local small business was conducted to see how much…

A: Given that: Sample of n=10 employees: 108,112,117,130,111,131,113, 113, 105, 128 Claim: less than…

Q: Browsing on the mobile device. A 2012 survey of 2292 American adults indicates that 20% of cell…

A:

Q: Given a normal population with mean = 39 and variance = 16, what is the probability of obtaining an…

A:

Q: a Pew research center survey ask adults in the United States which technology would be very hard to…

A: It has been given that 2000 users have been emailed or surveyed. Thus, we have, n = sample size =…

Q: What is the correct interpretation of Jackson’s z-score?

A: The z-score value is 1.10.

Q: What is the formula for a two tailed test?

A: In two-tailed test the critical area of a distribution is two-sided.  If the sample being tested…

Q: Which characteristics appear to be statistically significant in explaining the variation in prices,…

A: Excel Procedure: Enter House Age, Square Feet, Bedrooms, Brick and Lot size, Price data in Excel Go…

Q: An industrial psychologist feels that a big factor in job turnover among assembly-line workers is…

A: The psychologist feels that workers who change jobs often have on the average lower self-esteem as…

Q: An analysis of variances produces dftotal = 35 and dfwithin = 28. For this analysis, what is…

A: We have given the following Analysis of variance produces dftotal = 35 And dfwithin = 28

Q: (b) How many respondents total were examined in the ANOVA? ? (c) For the ANOVA test, it is assumed…

A: The results of ANOVA are given in the ANOVA table.

Q: An industrial psychologist feels that a big factor in job turnover among assembly-line workers is…

A: The sample sizes are 10 and 17.

Q: Rock-paper-scissors is a game played by two or more people where players choose either rock, paper,…

A: Solution: Given:

Q: Can you think of any flaws in the One-Sample Z-Test for Mean?

A: Introduction: Suppose the true, unknown mean of a population of interest is μ.

Q: In each of the following situations, a random sample must be obtained. Determine whether a cluster,…

A: Systematic sampling is a type of sampling in which every kth member is included in the sample after…

Q: A researcher is interested in the impact of joining a weight loss program in the past 12 months on…

A: The complete set of people or objects with certain common characteristics under the study is called…

Q: A teaching assistant for a psychology course is curious about what factors are associated with…

A: Main effect: The effect of the ind. variable on the depend. variable is termed as the main effect.…

Q: What is meant by saying that a statistical procedure is robust?

A: A statistical procedure is said to be robust in the following situations when the procedure is…

Q: A random sample of 50 pieces of candy from a bag of assorted types is examined. Which of the…

A:

Q: According to the accounting association, 30% of all CPA financial advisors have an average client…

A: Given, The percentage of CPA of financial advisors have an average client size between $250,000 and…

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.