In a cognitive psychology experiment, the researcher is interested in whether encoding condition has an effect on memory for a list of words. She recruits 12 subjects to participate in the experiment. Each subject comes to the lab twice to be tested in two different encoding conditions and their memory performance scores are listed below. The researcher would like to leave the hypothesis non-directional without predicting which encoding condition would lead to better memory, and she sets the significance level at a = .05 for a two-tailed test. Subject ID 1 3 4 5 6 7 8 9 10 11 12 Encoding A 177 189 185 178 181 186 193 192 187 182 179 188 Encoding B 179 193 188 176 178 184 191 187 182 178 176 184

Q: I’m testing the claim that a population exceeds .62, the null hypothesis is H0, what is it?

A: H0 = Null Hypothesis H1 = Alternative Hypothesis

Q: The mean age of bus drivers in Chicago is 59.2 years. If a hypothesis test is performed, how should…

A: Given : Claim : The mean age of bus drivers in Chicago is 59.2 years.

Q: I need help finding the test statistic, the p-value, and whether or not to reject the null…

A: Before we proceed with the hypothesis test, we must calculate necessary descriptive statistics…

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 are hired by a university health services department to examine the relationship between flu…

A: 1. The research hypothesis is, whether flu vaccination had really worked for treating flu or not.…

Q: The p-value for a hypothesis test turns out to be 0.08621. At a 5% level of significance, what is…

A: Decision rule : Reject H0 if P-value  <  α

Q: A publisher reports that 41% of their readers own a particular make of car. A marketing executive…

A: Sample size=240Sample proportion=0.35

Q: The agriculture extension office wants to test the claim that GMO carrots are longer than Organic…

A: we have given that  two types of data  1)GMO carrots  2)organic carrots

Q: Use the following scenario to conduct a hypothesis test.  You will again go through the different…

A: Given: p = 0.58 x = 364 n = 682 α = 0.05

Q: The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample…

A: Solution: The critical boundaries for a hypothesis test are z = +1.96 and -1.96. Z test statistic or…

Q: Find the P-value for a left-tailed hypothesis test with a test statistic if z=-1.26. Decide whether…

A: Given information- We have given a left-tailed hypothesis test. The value of the test statistics, z…

Q: I need help finding the test statistic, p-value, and whether or not to reject the null hypothesis.…

A: The null hypothesis (H0) is that the average densities at the two stations are equal, which can be…

Q: With the information shown, Please do step 3 & 4 of the hypothesis testing 1.The number of people…

A: Here, expected frequencies are calculated.

Q: James is a school psychologist who wants to implement stress coping skills to help his students. His…

A: Here the direction of the test is to the left.

Q: According to a recent study annual per capita consumption of milk in the United States is 21.5…

A: 1) From the provided information, The hypotheses can be constructed as: H0: µ = 21.5 H1: µ > 21.5…

Q: Find the P value for a left-tailed hypothesis test with a test statistic of z=-1.17. Decide whether…

A: From the provided information, z = -1.17 The corresponding p value of the provided z score from the…

Q: Use the following scenario to conduct a hypothesis test.  You will again go through the different…

A: Givensample size(n)=682x=364significance level(α)=0.05

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: 15. The P-value for a hypothesis test is P = 0.033. Do you reject or fail to reject HO when the…

A: given data, p=0.0333α=0.01we have to gave a conclusion for the hypothesis testing.

Q: Thumbs-up is a popular and new soft drink company in India.  The company wants to test the market…

A: The known values are The sample proportion is, Null and alternative hypothesis: Significance…

Q: A sample of n = 16 individuals is selected from a population with = 60 and o = 6 and a treatment is…

A: Given that,Mean = 60Standard deviation = 6Sample size, n =16Sample mean, M = 63

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: In a study of the determinants of household expenditures on vacation travel, data were obtained from…

A: Given that  annual consumption expenditure We are given beta_{i} = 1.1532 SF = 0.0527 n = 2226 no.…

Q: Researchers in Britain asked some people about their daily coffee intake. Of the 22 people from that…

A: Of the 22 people from that group who had the highest coffee intake, nine of them reported hearing…

Q: reject the null hypothesis in favor of an alternative hypothesis at the 5% level of significance.…

A: It is known that if the p-value is less than the level of significance, the null hypothesis gets…

Q: We are testing whether students learning online perform worse than students learning in person. If…

A: Claim : Students learning online perform worse than students learning in person. The hypotheses…

Q: A statistical program is recommended. PC Magazine provided ratings for several characteristics of…

A: The predictor variables is overall rating,  represents the contrast ratio rating and  represent the…

Q: In a hypothesis test, the likelihood of rejecting the null hypothesis is independent of the sample…

A: Introduction: In a hypothesis testing problem, the decision regarding rejection/ failure of…

Q: alpha level for

A: Choosing the alpha level for a hypothesis test allows researchers to control the probability of…

Q: The p-value for a hypothesis test turns out to be 0.05949. At a 9% level of significance, what is…

A: P-value=0.05949and α=0.09

Q: Suppose 225 subjects are treated with a drug that is used to treat pain and  51 of them developed…

A: Given that  Sample size n =225 Favorable cases x =51 Sample proportion p^=x/n  =51/225 =0.2267

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

A: Given data: Significance level = 0.10 To find the appropriate confidence interval

Q: A well known Maine canoe company claims to be favored by over 60% of white water canoeists. A…

A: The null and the alternative hypotheses are, H0: Maine canoe company is favored by less than or…

Q: A cereal company claims that the mean weight of the cereal in its packets is not 12 oz.  Identify…

A: It is given that the claim is that the mean weight of the cereal in its packets is not 12 oz.

Q: Discuss and interpret the relation strength and direction indicated by this statistic. Test your…

A: Given sample data represents the self-reported height and weight of female participants.

Q: Lemis Sweets Company (LSC) makes a special candy called HAPPYGR company claims that 30% of HAPPYGROW…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Please explain:   What kind of a study can be measured by an independent samples t-test?

A: Note: Since you have posted multiple independent questions in the same request, we will solve the…

Q: The test statistic for the hypothesis test is:  (please round to two decimal places) The p-value…

A: From the output, the test statistic is 15.36. Thus, the test statistic for the hypothesis test is…