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Q: An arrival reports that blue eyed people earn less than brown people, with these numbers: average…
A: Given data: The average salary of blue-eyed people is: A=$35,000. The average salary of brown-eyed…
Q: A researcher wants to determine if having a visible tattoo can significantly lower the…
A: We will be using the One-way repeated-measures ANOVA here. The Null and Alternate hypotheses are…
Q: Use a x2-test to test the claim o? = 0.48 at the a = 0.05 significance level using sample statistics…
A: Null hypothesis: The value of the test statistic is given and calculated as follows:
Q: Suppose you carry out a significance test of H0: μ = 8 versus Ha: μ > 8 based on sample size n = 25…
A: Given that µ = 8 n = 25 df = n-1 = 25-1= 24
Q: Following data are only a sample of number of cars rented daily: 3 2 4 2 5 4 2 6 1 Test the…
A: Given Null hypothesis : mean number of car rented is greater than 4 Alternative hypothesis: mean…
Q: You conduct a 1-way ANOVA with 5 groups and find a statistically significant result (using…
A: Number of pairwise contrasts: Given that there are 5 groups. Number of pairwise contrasts=number of…
Q: he data and the source table below are from a Repeated-Measures ANOVA. Using this information,…
A: Solution: Given information: k = 3 groups Each group has 4 observation. n= 4 observation in each…
Q: In a random sample of 28 high school students, the linear correlation coefficient R between the…
A: The question is about correlation Given : Linear correlation coefficient ( r ) = -0.473 Randomly…
Q: 1. Pedro is studying the effect of sleep on social media use. He instructed his participants to…
A: Note: As per the request of the student, the answer is provided for question 1.
Q: You wish to test the following claim (H) at a significance level of a = 0.10. Ho:p12 P2 Ha: P1 P2…
A: The question is about hypothesis testing.Given :No. of successes in first sample ( x1 ) = 102No. of…
Q: 10% of all Americans suffer from sleep apnea. A researcher suspects that a different percentage of…
A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…
Q: A particular fruit's weights are normally distributed, with a mean of 582 grams and a standard…
A: Obtain the standard z-score for the random variable X equals 548. The standard z-score for the…
Q: Please answer all parts
A: The test mean significant difference between the sample proportion and the population proportion for…
Q: Given a critical t score of -2.33 and t observed being -2.01, the decision you should make is…
A: It is given that the critical t score is -2.33 and the observed t value is -2.01.
Q: Tests of Between-Subjects Effects
A: ANOVA: Analysis of Variance is Statistical Technique to find out the Variation between the set of…
Q: Replacement of paint on highways and streets represents a large investment of funds by state and…
A: According to the provided data, the sample mean is 19.8 and the sample standard deviation is 1.5 and…
Q: You are conducting a hypothesis test on the body weights of male fraternity members. The null…
A: given data n = 64x¯ =210σ = 20α = 0.01claim : μ ≤ 7.00
Q: You are conducting a study to see if the proportion of men over 50 who regularly have their prostate…
A: H0 : p =0.25 H1 : p ≠0.25 Population proportion = p₀ = 0.25 Sample number of…
Q: Use α = .05 for both analyses. dependent samples t test: (a) develop a research question that can…
A: We use dependent sample t test or the paired sample t test when both of the samples are dependent to…
Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…
A: Note:Thank you for posting the question! Since your question has more than 3 parts, we have solved…
Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is lower…
A: Z-test for population proportion will be used. The hypotheses can be constructed as: H0: p = 0.08…
Q: alue for a right-tailed test using a significance level of ?=0.02.α=0.02
A: To find the z value, use the standard normal table to find the z-score which cuts off an area of…
Q: Use the random sample data to test the claim that the mean time spent online per day by community…
A:
Q: mates that the average daily per-store theft is less than $100, but wants to determine the accuracy…
A: Mall security estimates that the average daily per-store theft is less than $100, but wants to…
Q: a simple random sample has been selected from a normally distributed population. Find the test…
A:
Q: from the image, The following data summarize the results from an independent-measures study…
A: Step 1: State the hypotheses and specify α H0 : μ1 = μ2H1 : not H0 (at least one of the means are…
Q: Select the most appropriate answer(s). Tukey's HSD is performed subsequently after an ANOVA because.
A: Tukey's HSD is a post-hoc test, which is used to determine the statistical significance of two sets…
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: Which will increase statistical power? Using a smaller sample Using a more diverse…
A: Power of the test: The power indicates the probability of the test rejects H0 correctly.
Q: Which best illustrates the distinction between statistical significance and practical importance?…
A: Statistical Significance: It tells the relation between two or more variables which are caused by…
Q: The data below are from a study comparing three different treatment conditions: Treatment 1…
A: Test Hypotheses: There are 3 groups of treatments. Denote the true average scores of the three…
Q: Which of the following is favorable in a randomized controlled trial? OA. Use of competing…
A: RCTs are considered the gold standard for checking the effectiveness of medical treatments and…
Q: FIND THE test statistics value FOR TWO TAILED TEST SAMPLe sixe 26 and level of significance is…
A:
Q: You are conducting a study to see if the accuracy rate for fingerprint identification is…
A: Given, The sample proportion is, The null and alternative hypothesis is:
Q: A repeated-measures related samples study is used to compare two treatments with a sample of n=4…
A: The sample standard deviation for the set of difference scores is, sd=SSn-1=484-1=16=4 The sample…
Q: Но:р — 0.1 H1:p + 0.1 u obtain a sample of size n = 704 in which there are 45 successes. at is the…
A: We have given that Sample size n =704 Favorable cases x = 45 Sample proportion p^=x/n =45/704…
Q: What is the test statistic for this sample? (Report answer accurate to three decimal places.) test…
A: Given data number of success , x= 63 sample size, n =158 population proportion,p= 0.37…
Q: After a sample of n=25 high school students took a special training course, their SAT scores…
A: Given Data: n=25 MD=18SS=9600 Standard Deviaton=SSn-1=960024=400=20
Q: Independent random samples were selected from two quantitative populations, with sample data given…
A:
Q: You are conducting a study to see if the accuracy rate for fingerprint identification is…
A: Given Data: level of significance=0.1
Q: In the population of senior students at Shermer High School, the proportion who plan to attend…
A: From the provided information, Population proportion (p) = 0.64 Sample size (n) = 100 Sample…
Q: Management at Deluxe Diner is in process of establishing a quality control system for the time it…
A: Sample size n = 3x¯¯=100R¯=40We have to find the 3σ UCL for the R-chart.
Q: With 0.05 significance level, H1: p > 0.5, and the value of test statistics is z = 1.25. Then
A:
Q: if there is a significant difference in systolic blood pressures between medication groups assuming…
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You conduct a 1-way ANOVA with 5 groups and find a statistically significant result (using α=0.05α=0.05). You intend to follow this up with a post-hoc analysis. In particular, you plan to examine all pairwise contrasts. You retain the same nominal significance level for all tests. Round your answers to three decimal places, if necessary.
Q: What is the
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- comparison of the precisions of two machines developed for extracting juice from oranges is to be made using the following data. Is there sufficient evidence to indicate that there is a difference in the precision of the two machines at the 5% level of significance? Machine A Machine B s2 = 1.4 ounces2 s2 = 3.1 ounces2 n=25 n=2010% of all Americans suffer from sleep apnea. A researcher suspects that a lower percentage of those who live in the inner city have sleep apnea. Of the 369 people from the inner city surveyed, 22 of them suffered from sleep apnea. What can be concluded at the level of significance of αα = 0.01? For this study, we should use Select an answer t-test for a population mean z-test for a population proportion The null and alternative hypotheses would be: Ho: ? μ p Select an answer = < ≠ > (please enter a decimal) H1: ? μ p Select an answer > ≠ < = (Please enter a decimal) The test statistic ? z t = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is ? > ≤ αα Based on this, we should Select an answer reject accept fail to reject the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly smaller than 10% at αα = 0.01, so…You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly smaller than 68% at a significance level of αα = 0.05. According to your sample, 52 out of 82 potential voters prefer Candidate A. The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)
- For each of the tests, what would be the conclusion if the test were carried out using the α = 0.05 level of significance? H0 : µ = 120, H1:µ ≠ 120, n = 36, S.D of population= 10.3, sample mean = 117.0Identify the statistical procedures that are appropriate for the data. When possible, identify descriptive statistics, inferential statistics, and a measure of effect size Research suggests that the antioxidants in foods such as blueberries can reduce and even reverse age-related declines in cognitive functioning ( Joseph et al., 1990) to test this phenomenon, a researcher selects a sample of n = 25 adults aged 70 to 75 and administers a cognitive function test to each participant. The participants then drink a blueberry supplement every day for 4 months before they are tested again. The researcher compares the scores before treatment with the scores after treatment to see if there is any change ion cognitive function.If the test requires that the results be statistically significant at a level of α = 0.05, fill in the blanks and complete the sentences that explain the test decision and conclusion. The decision is to reject the null hypothesis. There is enough evidence at a significance level of a = 0.05 that the mean weight for U.S. women of age 40-49 who smoke daily is less than 169.976 pounds.
- You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly more than 0.15. You use a significance level of a = 0.01. Но:р — 0.15 H1:p > 0.15 You obtain a sample of size n 137 in which there are 28 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is.. less than (or equal to) a greater than a This test statistic leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that. O There is sufficient evidence to warrant rejection of the claim that the proportion of women over 40 who regularly have mammograms is more than 0.15. O There is not sufficient evidence to warrant rejection of the claim that the proportion of women over 40 who regularly have mammograms is more than 0.15. The sample data support…After conducting your one-sample z-test, you find an obtained z-statistic of 1.08 and a critical z-statistic of 1.64. What do you conclude? Group of answer choices Fail to reject the null hypothesis; the sample mean and population mean are significantly different. Reject the null hypothesis; the sample mean and population mean are significantly different. Fail to reject the null hypothesis; the sample mean and population mean are not significantly different. The results of the test are inconclusive.Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"
- You wish to test the following daim (Ha) at a significance level of a = 0.05. Ho:P1 P2 You obtain a sample from the first population with 422 successes and 126 failures. You obtain a sample from the second population with 385 successes and 176 failures. critical value = [three decimal accuracy] test statistic = [three decimal accuracy]A repeated-measures ANOVA was calculated with df = 1, 14. If the same data were analyzed with a repeated-measures t test, how many degrees of freedom would be used with the t statistic?Which best illustrates the distinction between statistical significance and practical importance? Multiple Choice "This year, 360 of 440 statistics students at Oxnard Technical College rented their textbooks, compared with 110 of 330 students last year. This is a significant increase." "Our new manufacturing technique has increased the life of the 80 GB USB AsimoDrive external hard disk significantly, from 240,000 hours to 250,000 hours." "In 50,000 births, the new vaccine reduced the incidence of infant mortality in Morrovia significantly from 14.2 deaths per 1000 births to 10.3 deaths per 1000 births." "The new Sky Penetrator IV business jet’s cruising range has increased significantly from 3,975 miles to 4,000 miles."
