Explain why a chi-square goodness-of-t test, a chi-square independence test, or a chi-square homogeneity test is always right tailed.

Q: In a left-tailed test, if the p-value but the null hypothesis is true, we made a Type I error. |

A: Here use basic of type 1 error

Q: Amayor claims that more than70% of people in her city support her policies. -State the claim…

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Q: Test of Independence:

A: Given that A researcher would like to see if smoking status influences alcohol consumption

Q: A chi-square independence test is to be conducted to decide whether an association exists between…

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Q: Identify three techniques that can be tried as a remedy when one or more of the expected-frequency…

A: The requirements that must be satisfied to perform a chi square test for independence are: All the…

Q: A chi-square test for homogeneity was conducted to investigate whether the four high schools in a…

A: Given:  p-value of the test = 19.02 and 0.025

Q: A survey by the National Institutes of Health asked a random sample of young adults (aged 19 to 25…

A: The expected frequency for each cell is greater than 5. The data come from a single random sample of…

Q: If an unbiased estimator (for a certain 0 on the whole real line) is sufficient, must it achieve the…

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Q: Researchers from the Department of Education are always looking for ways to improve methods of…

A: Chi square test is a non parametric test and distribution free test. Chi square test can be used…

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

A: From the given information contingency table will be as follows:

Q: What is Tukey’s HSD Test?

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Q: (a) Show that the significant value of t at level of significance a for one-tailed test is equal to…

A: Note: Hi there! Thank you for posting the question. As you have posted 2 different questions, we…

Q: Suppose the variance of house selling prices in both Calgary and Edmonton are known. We are…

A: This question is asked to p value for the hypo. test for the difference between two popl means.…

Q: State a null and alternative hypothesis for a chi-square test. Also, what should we expect ( in…

A: Explain.... State a null and alternative hypothesis for a chi-square test

Q: In order to reject the null, the z score must be in the    - common zone - rare zone -…

A: To reject the null hypothesis the test statistics must  be in....

Q: Suppose that you did a Right-Tailed Test and that you Rejected the Null Hypothesis. Which is bigger,…

A: Decision Rule: For right tailed test, If the test statistic is greater than the critical value, then…

Q: An oil company claims that less than 20 percent of all car owners have not tried its gasoline. Test…

A: Stating the appropriate null and alternative hypotheses: The hypotheses are given below: Null…

Q: A random, nationwide poll 0f several thousand gun owners shows that 80 percent of them are opposed…

A: Note: Hey there! Thank you for the question. As you have posted multiple questions, we have helped…

Q: 1. When should a one-tailed test be used? A two-tailed test?

A: Here, We have to give brief idea about one-tailed test and two tailed test When we conduct a test (…

Q: When performing a x²-test for independence, what is the test statistic?

A: Chi square is used to determine the independence between the categorical variable. It used the…

Q: A two-tailed test is performed at the 0.10 level of significance. The p-value is determined to be…

A: Given that, α = 0.10P-value = 0.07 (two-tailed test)

Q: Explain why a chi-square goodness-of-fit test, a chi-square independence test, or a chi-square…

A: If the difference between observed and expected frequencies is small, then the values of the test…

Q: A chi-square homogeneity test is to be conducted to decide whether four populations are…

A: The test for homogeneity determines if two or more populations (or subgroups of a population) have…

Q: A right-tailed test at 10% level of significance.

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Q: A job candidate at a large job fair can be classified as unacceptable, provisional, or acceptable.…

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Q: Although the chi-square homogeneity test and the chi-square independence test use essentially the…

A:

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: Solution: Let X be number of high school seniors believe that “getting rich” is an important goal…

Q: A survey by a magazine stated that 14% of men said they used exercise to reduce stress. A random…

A: Solution: Given information: n= 100 Sample size of men x= 10 men said they used exercise to relives…

Q: If the observed and expected frequencies for a chi-square goodness-of-fit test, a chi-square…

A:

Q: A financial analyst for an online stock trading platform claims that the proportion of stock…

A: Claim:  The proportion of stock portfolios that contain high risk stocks is different than 0.10 The…

Q: A researcher believes that the percentage of people who exercise in California is greater than the…

A: Given that Expected national rate =20%  Sample size (n)=120 The number of people observed who…

Q: Past studies have indicated that 85.6% of all enrolled college students in the U.S are…

A: The provided information are:Sample size (n) = 500Hypothesised proportion (po)=0.856Sample…

Q: A survey shows that 10% of the population is victimized by property crime each year. A random sample…

A: From the provided information, The sample size (n) is 527, sample proportion (p) is 14% and…

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: Stating the appropriate null and alternative hypotheses: The hypotheses are given below: Null…

Q: Consumer Reports stated that the mean time for a Chrysler Concorde to  go from 0 to 60 miles per…

A: Solution: From the given information, the claim is that the average time from 0 to 60 miles per hour…

Q: The chi-square statistic for this table is 28.8. Can you reject the null hypothesis? Why or why not?

A: Given Chi-square test statistic is 28.8

Q: How are the expected cell frequencies found for the chi-square test of a contingency table?

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Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: Solution: Given information; n=225 sample size of high school seniors X=171 getting reach p=0.80…

Q: A two-tailed test is performed at the .05 level of significance. The p-value is determined to be…

A: Test: Two-tailed Level of significance : 0.05 P-value = 0.09   Since, p-value is greater than 0.05,…

Q: What is the difference between the goodness of fit and the test of independence in the chi-square…

A: Given data: What is the difference between the goodness of fit and the test of independence in the…

Q: The business college wants to determine the proportion of business students who have extended time…

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Q: What is the p-value of a right-tailed one-mean hypothesis test, with a test statistic of z0=1.6? (Do…

A: Given - Right-tailed test Test Statistic = z = 1.6

Q: A job candidate at a large job fair can be classified as unacceptable, provisional, or acceptable.…

A: It is given that the large job fair classified as unacceptable, provisional, or acceptable. A…

Q: According to a survey conducted by the Association for Dressing and Sauces, 85% of American adults…

A: Solution: From the given information, the claim is that percentage of American adult’s eats salad at…

Q: Perform a left tail test to test whether Machine-2 has less variability. Use a significance level of…

A:

Q: What is the​ p-value if, in a​ two-tail hypothesis​ test, ZSTAT=+1.56​?       ​p-value= _______…

A: The test statistic is computed as zSTAT = 1.56.

Q: A random sample of n=750 people selected, of whom 92 are left-handed. Use these sample data to test…

A: Given that,possible chances (x)=92sample size(n)=750success rate ( p )= x/n = 0.1227success…

Q: A Labrador retriever club has 130 members: 65 black Labs, 44 golden Labs, and 21 chocolate Labs.…

A: It is given that the number of members in a club is 130.

Q: A survey by the National Institutes of Health asked a random sample of young adults (aged 19 to 25…

A: The cell contributes most to the chi-square test statistic is males who currently live in their…