If your test statistic is more extreme (farther from 0) than the critical value, and has the same sign as the critical value then you: If your p-value is less than or equal to your alpha level, then you: If your test statistic is not more extreme( closer to 0) than the critical value, then you: If your p-value is greater than your alpha level, then you: When doing hypothesis tests for the mean, it is very unusual to know the population standard deviation, sigma, and we have to use the sample standard deviation, s. Therefore, we almost always use:

Q: You are conducting a hypothesis test about income where the research (alternative) hypothesis is…

A: It is given that  Population mean, μ = 60000 Sample mean, x̄ = 65000 Standard error, SE = 130

Q: I think I'm supposed to do a hypothesis test for a difference in means on this review problem, but…

A: It is given that:

Q: Dr. Malpractice is trying out some new treatments on his patients. He randomly assigns people to one…

A: Test Hypotheses: There are 3 groups of treatments. Denote the true average mobility of the three…

Q: You wish to test the following claim (H.) at a significance level of a = 0.10. H.:P1 P2 Ha:P1 < P2…

A: Givenα=0.10H0:p1=p2Ha:p1&lt;p2n1=273   , x1=193p1^=x1n1=193273=0.7070n2=436   ,…

Q: Determine the decision criterion for rejectiong the null hypothesis in the given hypothesis test;…

A: The critical value is obtained below: The level of significance=0.05. The degrees of freedom=…

Q: You wish to test the following claim (Ha) at a significance level of a 0.02. H.:P1 = p2 Ha:Pi # P2…

A:

Q: If the p-value found in an experiment is 0.85. We reject the null hypothesis. True False

A:

Q: For the situation described below, (1) list the threat to statistical conclusion validity that is…

A: 1. Threat to Statistical Conclusion Validity: Low Power 2. Reason for the Threat: The threat of low…

Q: A two-sided t-test of the null hypothesis Ho: u=40 is conducted. If a 95 percent t-interval…

A: The objective of the question is to understand the relationship between the p-value, the confidence…

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: If you receive a p-value of 0.233 when performing a statistical test. Using the normal alpha level,…

A: From the provided information, The p value is 0.233.

Q: You wish to test the following claim (H) at a significance level of a = 0.01, Ho: P₁ Ha: P1 P2 P2…

A: Givensignificance level(α)=0.01The null and alternative hypothesis isH0:p1=p2Ha:p1&gt;p2x1=202sample…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.05.

A: From given data, Significance level,

Q: (4) If the p-value for a test is less than the significance level (a), e.g. p-value=0.01 and a…

A: If the resulted p value is less than level of significance α, then the null hypothesis will be…

Q: For which of the following P-values will the null hypothesis be rejected when performing a test with…

A: significance level(α)=0.05

Q: ent F is a sample statistic. What does it tell us about the value of the population correlation…

A: The table shows the x and y values.

Q: New Orleans' Coca Cola bottling center wants to determine whether the mean amount of product in a 12…

A:

Q: Please help me find test statistic and critical value

A:

Q: Road Transport Department claims that the mean speed of cars on a highway is 114 km/h. An insurance…

A: In question, Given the mean speed of cars on highway is 114 km/h. The sample of size is 21 cars…

Q: State the statistical hypotheses against a population with a mean of 90 for a one-tailed test where…

A: Given: μ=90 The hypotheses for testing the population mean is given bellow: Null hypothesis: H0:…

Q: Suppose in a two-sided test of hypothesis for proportions, the compluted value of the z - statistic…

A: Suppose a two-sided test of hypothesis for proportions.Test statistics: z = -0.02

Q: Consider the following null and alternative hypotheses: Ho:u = 60 versus H1: µ > 60 Suppose you…

A:

Q: Are blonde female college students less likely to have boyfriends than brunette female college…

A:

Q: You wish to test the following claim (H) at a significance level of a = 0.10. Ho: P1 = P2 Ha: P₁ P2…

A: given data n1 = 370x1  = 708n2  = 579x2 = 324α = 0.10claim : p1 &lt; p2p^1 = x1n1 = 370708…

Q: A manufacturer claims that its compact fluorescent bulbs contain an average of 1.1 mg of mercury.…

A: given data  claim: μ= 1.1 mg two tailed test. find null and alternative hypothesis.

Q: A student performs a test of Ho: p = 0.4 versus H₂: P = 0.4 and gets a p-value of 0.03. The student…

A: Here we need to choose from the correct option.When performing hypothesis testing, you compare the…

Q: researcher in your department asks you for some statistical advice (a) She is very concerned about…

A: The hypothesis is an assumption that is being tested.

Q: For the situation described below, (1) list the threat to statistical conclusion validity that is…

A: 1. Threat to Statistical Conclusion Validity: Low Power 2. Reason for the Threat: The threat of low…

Q: You are conducting a hypothesis test where alternative (research) hypothesis is that mu is greater…

A: The test statistic is independent of significance level.

Q: You are doing a right-tailed hypothesis test for the mean and have to approximate the standard…

A: It is given that the test is right-tailed. Level of significance is 0.01 Degrees of freedom is 39-1=…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.05. Ho: P₁ ≤ P2 Ha:P₁ >…

A: Given Alpha=0.05 n2=123 n2=104 X1=269 X2=335

Q: Which of following is not true about the null hypothesis? Suggesting that there is an absence of…

A: a) It is true that null hypothesis suggest that there is an absence of effect.

Q: Find the value of the standard score, z, and determine whether to reject the null hypothesis at a…

A: here given data is:H0:μ=4.5H1:μ&gt;4.5we have to find out the value of standard score, critical…

Q: You wish to test the following claim (H1) at a significance level of α=0.005.       Ho:p1=p2…

A: The Provided information are                                                    :H0:p1=p2H1:p1&lt;p2…

Q: You wish to test the following claim (H.) at a significance level of a = 0.001. H.:p1 = P2 Ha:P1 >…

A: Given,n1=280 ,  x1=110n2=529  ,…

Q: You wish to test the following claim (Ha) at a significance level of a Ho: p > p2 Ha: P1 P2 You…

A: Assume that p1, p2 are the proportions of 1st and 2nd populations, respectively.

Q: Find the following critical values for a hypothesis test described. (a) right-tailed test about…

A: (a) The critical value for a right-tailed test about proportion α=0.01,n=40. The area to the right…

Q: You wish to test the following claim (Ha) at a significance level of a = 0.01. H Pi = P2 = 236 from…

A: Assume that p1 is true proportion of first population p2 is true proportion of 2nd population.

Q: Important: This question continues from the previous three question and onto the following question.…

A: From the given information we conduct z test for Proportion.

Q: You wish to test the following claim (Ha) at a significance level of a Ho: P₁ = P₂ Ha: P₁ P2 You…

A: Given Alpha=0.005 n1=126 n2=173 x1=290 x2=486

Q: A suggestion is made that the proportion of people who have food allergies and/or sensitivities is…

A:

Q: Suppose a hypothesis test is performed with a level of significance of 0.05. Then if the null…

A: A type 1 error occurs when a researcher rejects the true null hypothesis, if the significance level…

Q: he mean age of bus drivers in Chicago is 54.4 years. If a hypothesis test is performed, how should…

A:

Q: You wish to test the following claim (Ha) at a significance level of α=0.05.       Ho:p1≤p2Ho:p1≤p2…

A: State the hypotheses.

Q: You wish to test the following claim (Ha) at a significance level of a = 0.02. H.:P1 = P2 Ha:P1 < P2…

A: Given  n1=476, X1=344, n2=398, X2=331 Level of significance=0.02 p1cap=X1/n1 and p2cap=X2/n2

Q: You are conducting a study to see if the proportion of voters who prefer Candidate A is…

A: Given: Number of trials (n)=82 Number of voters that prefer candidate A (x) = 52 The sample…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.