Give the degrees of freedom for the chi-square test based on the two-way table.

Q: Which of these two research objectives may be addressed using Chi-Square test of independence?

A: Chi square test of independence is used to determine whether two variables are dependent or not.

Q: If a variable of two populations has only two possible values, the chi-square homogeneity test is…

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Q: when is a dummy variably useful?

A: Dummy variable: This is an artificial variable which indicates more than or equal to two categories…

Q: 2. Calculate the : a. standard devitaion    b. coefficient of variation

A: Variance is the square of the sum of deviations of values from their arithmetic mean by their number…

Q: A lamp manufacturer company tests the two new models of LED spotlights for commercial use, trying to…

A: The hypothesis will be stated  H0: μ1= μ2H1: μ1≠ μ2 This is a two tailed hypothesis test ANOVA test…

Q: Below is a table that a sample of 100 people from a school and what type of car they drive and if…

A: From the given information,   Foreign Domestic Total Student 15 35 50 Staff 25 25 50 Total…

Q: Researchers in biology collected a sample of bees. They want to test if the average size of bees is…

A: It is given that the A researcher collects a sample of bees in order to test if the average size of…

Q: What are the restrictions of use for a Chi-Square analisys?

A: The chi-square is very sensitive to sample size. As the sample size increases, absolute differences…

Q: Two distinct groups of students took AP Calculus and AP Statistics exam respectively. On the AP…

A: The chi-squared test is generally used to compare the actual observed data with that of the expected…

Q: A has multiple criteria for admitting students into one of its academic udent achievement scores…

A: We see that the dependent variable is chance of success for each student, which lies in the interval…

Q: Suppose I’m using chi-square analysis to determine the relationship, if any, between a pair of…

A: Chi square test for independence is used to test determine if there is any significant relationship…

Q: Which table is used to find the critical value in the Cochran Q test?

A: In Cochran Q test, we use asymptotai critical value.

Q: Which hypothesis test has the greatest power? a. t-test with a 90% chance of rejecting H0 b.…

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Q: The number of degrees of freedom in a chi-square test refers to the number of values free to vary…

A: The number of degrees of freedom in a chi-square test refers to the number of values free to vary…

Q: To find the t-obtained for an independent two-sample t-test, which step is not required?

A: Given 2-Sample Independent t-test

Q: The number of degrees of freedom associated with a chi-square test for independence based upon a…

A: From provided information; it is given that chi-square contingency table is of 4 rows and 3 columns.

Q: What determines whether we use the z-test or the t-test?

A: Z statistic: Z=(X¯-μ)σ/n~N(0,1) with mean=0,variance=1   t statistic t=(X¯-μ)S/n

Q: A study using the chi-square test of independence has 4 categories of one variables and 2 categories…

A: We have given that  4 categories of one variables=r 2 categories for its other variables=c

Q: A Type II error occurs when a researcher concludes?

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Q: The only difference between a hypergeometric experiment and a binomial experiment is that the…

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Q: What are the Assumptions of z Test?

A: One sample z test: One sample z test is used to compare the mean of a variable in the sample to a…

Q: The popularity of the chi square test is largely due to what?

A: Given problem Given that   The popularity of the chi square test is largely due to  Ans) The…

Q: A researcher selects a sample of 100 people to investigate the relationship between gender…

A: Solution: From the given information, out of 40 females 30 are registered voters. Out of 60 males 40…

Q: A researcher used a Chi-Square test for independence where the two variables were eye color and hair…

A: The Chi-square test of association evaluates relationships between categorical variables. Null and…

Q: A sample of n = 100 people is classified into four categories. If the results are evaluated with a…

A: We know that Degree of freedom =No. of class -No. of condition. Since there will be only one…

Q: Two distinct groups of students took AP Calculus and AP Statistics exam respectively. On the AP…

A: The observed data is   5 4 3+2 (As asked) Total AP Calculus 29 8 6+1 = 7 44 AP Statistic  24…

Q: Calculate Karl Pearson's coefficient of correla- tion and its probable error from the following data…

A: Let X denote the Value of imports Y denote the Value of exports.

Q: The table below shows the color and the model of cars purchased by 160 randomly selected customers…

A: For the given data Perform Chi square test

Q: A survey is conducted to determine if there is a difference in the proportion of students, parents,…

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Q: A large oil company is studying the number of gallons of gasoline purchased per customer at…

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Q: I am doing a two tailed z test with a z statistic of 1.72, what is my p value?

A: It is given that there is a z-test for two-tailed and the test statistics value is 1.72.

Q: Find the P-value for a right tailed test that produces a test statistic of z = 1.945.

A: We have given that,  Z= 1.945 Right-tailed test Then,  We will find the P-value = ?

Q: Where does the Tukey’s HSD test can be used?

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Q: What is the value of the test statistic for a test with a null hypothesis that mu = 250, Xbar = 260…

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Q: A sample of 300 items was selected. compute the p-value

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Q: The critical value of t for a two-tailed test with 10 degrees of freedom using α = .05 is?

A: Given that, The test is a two-tailed test with 10 degrees of freedom using α = .05.

Q: Discuss the assumptions for one-sampled t-test and why they are important.

A: Assumptions:The assumptions that must be satisfied to ensure that the results are valid,…

Q: Type II error occurs when an individual fails to reject H0 when H0 is false. True or False?

A: Type I error: The type I error occurs when rejecting the null hypothesis when it is true. It is…

Q: In a population of 150 pea plants, there are 89 tall-purple plants, 25 short-purple plants, 28…

A: The study is about chi-square test. The test is to check whether the two traits are experiencing…

Q: What is a Chi-square test of independence? How is it helpful? Why is it used?

A: The chi-square test of independence is used when there are two categorical variables. It is mainly…

Q: State the null hypothesis for a Chi-Square test for independence.

A: Test is that whether achieving a basic skill level in a subject independent to the location of the…

Q: The effectiveness of surgery for weight loss reported here found that "The surgery was associated…

A: The difference between initial weight and the final weight is determined for each subjects.

Q: What is t critical for a study that contains 9 participants in one group and 11 is another group?…

A: Solution-: Given: We want to find critical values for situation

Q: The calculated value for your Chi Square crosstabulation comes in at 9.888. The test has 4 degrees…

A: From the information, given that the value of the test statistic is 9.888 and the degrees of freedom…

Q: If a chi-square test of Independence ends in a non-significant result it means that the variables…

A: The hypotheses for the chi-square test of Independence are, Null hypothesis: H0: The two variables…

Q: What else can be calculated by the TI-83 besides the normal probabili

A: answer of given question is in step 2

Q: For the chi-square test of independence, Provide a hypothetical formulation of test of independence.

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Q: This is a function that assigns a real number to each outcome in the sample space of a random…

A: We know that  Event : A set of outcomes of an experiment is called Event. Random variable : A random…