What is the test statistic? z= What is the P-value? What is the conclusion about the null hypothesis? Thank You!

Q: What is meant by "the t-test is robust"?

A: The t-test is strong to non-ordinariness; its legitimacy is possibly raised doubt about whenever…

Q: college students average about 7 hours of sleep per night. You believe this number is incorrect and…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Problem statement: A recent research states that Newborn babies are more likely to be boys than…

A: GivenTotal number of newborn children born =50The total boys born among new children =30 let the…

Q: value, Test Statistic and Hypotheses

A: From the available information, the population is normal with unknown population standard deviation.…

Q: when we will be reject the NULL HYPOTHESIS on the basis of

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: Which provides stronger evidence against the null hypothesis, a P-value of 0.06 or a P-value of…

A: Decision criterion:If the p-value of the test is less than or equal to the level of significance,…

Q: Report of seatbelt usage showed 27.5% versus 21.3% with z =1.36 what is the correct one sided p…

A: From the provided information, The value of test statistic (z) = 1.36

Q: Understanding the Concepts and SkillsWe stated earlier that a one-way ANOVA test is always right…

A:

Q: You obtain the following two samples of data. Sample #1 Sample #2 89.5 80.8 76.4 84.5 111.2 93.5…

A: A left tailed test for two means is performed while one mean is lesser than the other mean. A left…

Q: A home improvement company is interested in improving customer satisfaction rate from the 58%…

A:

Q: The p-value for a hypothesis test turns out to be 0.0715. At a 2% level of significance, what is the…

A: Here, the p-value is 0.0715. The level of significance is 0.02.

Q: When the chi squared statistic is used in testing hypothesis? Include underlying assumptions and the…

A: Chi-square statistic for testing single variance: The Chi-square statistic is used to test the…

Q: Explain how to conclude when you would reject the null hypothesis based on a p-value. Give a numeric…

A: We know that when p-value is less than the significance level than reject the null hypothesis and…

Q: A result is significant at the 0.01 level. Explain why it must also be significant at the 0.05…

A: 1.   It is needed to elaborate the relation of P-value with level of significance.

Q: Perform a 2-tailed z-test with a=D0.05 to determine if caffeine influences memory.

A: Z-test is a hypothesis test in which the z-statistic follows a normal distribution

Q: A poll showed the approval rating to be 0.45 (45%). A second poll based on 2000 randomly selected…

A: Given, The sample proportion is,

Q: Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value,…

A: a.   Denote p1, p2 as the true population proportions of violating the laws by owners of passenger…

Q: Power of the test is equal to?   a 1-significance level   b 1-Type 2 error   c 1-Type 1 error   d…

A: Power of the test is given.

Q: Use technology to find the P-value for the hypothesis test described below. The claim is that for a…

A: The degrees of freedom is, 11–1 = 10.The value of test statistic is –1.298.

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: Use technology to find the P-value for the hypothesis test described below. The claim is that for a…

A:

Q: Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-value,…

A: Given  X1= 231, n1=2018, X2=49, n2=363

Q: Major television networks conducted a joint poll of viewers and asked them if they felt that beer…

A: Given that, sample 1 is 1000 and favorable case 477, sample 2 is 1000 and favorable case 517. We…

Q: A home improvement company is interested in improving customer satisfaction rate from the 78%…

A:

Q: If the p-value is more than the declared significance level for the hypothesis test, what is the…

A: First talk about p value and level of significance. The p value is the level of marginal…

Q: the non-directional null hypothesis? What is the alternative hypothesis?

A: Hypothesis in statistics are the statements which need to be tested on the basis of the observed…

Q: Why is there a need to strictly consider the critical value and test-statistic value in the decision…

A: Critical value: the value of test distribution which separates the critical( rejection) region and…

Q: Explain the difference between a chi-square test for independence and a chi-square goodness of fit…

A: Explain the difference between a Chi-square test for independence and a chi-square goodness of fit…

Q: If the value of the observed test statistic falls in the rejection region, the alternative…

A: Identify the correct option for if the value of the observed test statistic falls in the rejection…

Q: Failing to reject an invalid null hypothesis (continuing to incorrectly assume a null is valid) is…

A: Option A) is correct. The beta-risk

Q: Test the claim at an a= 0.05 significance level. Round all values to 3 decimal places. • Fill in the…

A: Here the two categorical variables are scanning error rates and sale pricing practices.Given…

Q: MED Drug Company designed a new drug to prevent colds. The company states that this drug is about…

A: Given : MED Drug Company designed a new drug to prevent colds The company states that this drug is…

Q: I would like to test the claim that the mean IQ of statistics teachers is greater than 120. Identify…

A: I would like to test the claim that the mean IQ of statistics teachers is greater than 120. Identify…

Q: (Problem for Questions 22- 25). In a study focusing on children on the autism spectrum a team of…

A: Given:     Observed (O)   44   30   26 Sum=n 100

Q: What happens to the power of a hypothesis test if the significance level is decreased without…

A: Solution: It is required to mention what happens to the power of a hypothesis test if the…

Q: A data set includes data from student evaluations of courses. The summary statistics are n= 85, x=…

A: Given data : sample size, n = 85 sample mean, x̄ = 4.07 sample standard…

Q: True or false, explain: In a goodness-of fit test, if the p-value is 0.0153, in general, do not…

A: Solution: The given statement is “In a goodness-of-fit test, if the p-value is 0.0153, in general,…

Q: What does the p-value represent in a test of hypothesis? The p-value represents the significance…

A:

Q: A hypothesis test result is considered to be statistically significant only when? * The p-value is…

A: Since we know that statistically significant is the likelihood that a relationship between two or…

Q: ☐True ☐FalseThe null hypothesis in a paired-samples t-test is H0: ???????????=0.

A: The null hypothesis assumes that the true mean difference between the paired samples is zero

Q: Test the claim that the proportion of men who own dogs is smaller than the proportion of women who…

A: From the provided information,