A researcher is conducting a chi-square test for independence to evaluate the relationship between gender and preference for three different designs for a new automobile. Each individual in a sample of n = 30 males and n = 30 females selects a favorite design from the three choices. If the researcher obtains a chi-square statistic of χ2 = 4.81, what is the appropriate statistical decision (conclusion) for the test (please indicate df and your decisions with α = .05 and α = .01 by reporting critical values from the relevant table)?

Q: Suppose you are testing whether the lifetime of 4 different types of lightbulbs. You run 5…

A: From the provided data we have, MSE = 1.75 dft = 4×5 = 20 dfw = 20-4 = 16 k = number of groups = 4…

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A: Given information: x 89 90 91.5 92 92.5 95 95.5 96 93 93.5 94 94 91…

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Q: In an analysis of variance study (ANOVA), individuals were separated to two groups to test the…

A: Solution: Option b is correct. i.e. Factor: Medicine type,Treatments:group 1,group 2,response…

Q: A data set from a study that examined the effect of a specific diet on blood pressure is below.…

A: Given Information : A data set from a study that examined the effect of a specific diet on blood…

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A: Given: The sample number of students is n=190. The number of students studied at Aquarium are X=93.…

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Q: nean tip amount for males, the mean tip value for females and the t-statistic were 3.46, 2.21, 3.68.…

A: It is an important part of statistics . It is widely used.

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A: Given data, Null hypothesis is Ho : p=0.37 Alternative hypothesis is Ha: p!=0.37 z=2.288 p-value=?

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A: From the given information we conduct hypothesis test.

Q: The results of a study that used an independent samples t-test was t(28) = 2.14, p = .01. Based on…

A: t(28) means that degree of freedom  = 28 Now, degree of freedom for a t-test one sample case  = n-1.

Q: A population has a mean of 50, SD of 30. We have a sample with a mean of -10, sample size is 9. Does…

A: Denote μ as the population mean.

Q: The z-statistic for the difference between the tvlo sample proportions is 5.266 with a P- value of…

A: Given, Z-statistics = 5.266 p-value = 0.00000014 α=0.05

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A: Given information: The data represents the partial ANOVA table.

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Q: What is the formula for STANDARDIZED EFFECT SIZE, COHEN’S d (TWO INDEPENDENT SAMPLES)?

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A: Given For the given scenario of ANOVA We have Number of groups=k=5

Q: Body Mass Index is a measure of body shape. Duran et al. (2013) investigated BMI in Texas youth. In…

A: Solution:  The 95% confidence interval for difference in means μ1-μ2 is  ( -2.9517451, 0.2764086)

Q: How many subjects participated in an independent-samples t-test if a researcher reports, t (20) =…

A: Given information- We have given an independent-samples t-test. The value of test statistics is- t…

Q: t(23) = 3.20, p = .01.

A: Given, t(23)=3.20 p=0.01

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A: Univariate and Bivariate data: When only data for one variable is summarized in the study it is…

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Q: use a significance level of a=0.05 to test the claim that p1=p2 for two populations. Use the given…

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Q: An independent-measures study produced sample mean of M1 = 20 and M2 = 17.  If both samples have n=…

A: Given M1=20, M2=17 and Cohen's d=50.   It is known that      where  sp2 is the pooled variance.

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A: Given  The random variable X denotes the number of people in a car  The toll charges: $ 5 per car…

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A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

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A: Given Information:    Regression equation -  Predicted Math Score = 50.65 + 0.2634(MathDgr%)

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Q: The data in table is from a randomized block design represent blood pressure measurements from an…

A: The question is about ANOVA.Given :

Q: b) Now suppose that the same sample proportions came from a sample of 30 times as large. That is,…

A: