Scenario: Gary GradStudent suspects that the average household size may have increased over timeas people increasingly struggle to make ends meet. Use the below output from the GSS to test hishypothesis.Group StatisticsGSS year for thisrespondentStd. ErrorNMeanStd. DeviationMeanNumber of persons in198814812.621.406.037household201823482.351.334.028Independent Samples TestLevene's Test for Equality ofVariancest-test for Equality of Means95% Confidence Interval of theDifferenceStd. ErrorDifferenceMeanFSig.dfSig. (2-tailed)DifferenceLowerUpperNumber of persons inEqual variancesassumed18.408.0005.9943827.000271.045182.360householdEqual variances notassumed5.9233022.712.000.271.046.181361Question: Which of the following is the correct test statistic for this test?t = .271t = 5.994t = 18.408t = 3827

The table shows the output of independent samples test.

Answered: Scenario: Gary GradStudent suspects…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A researcher thinks that how often someone reports visiting a science museum in a year is different for people with children and people with at least one child. They get the following output: Group Statistics Std. Std. Error Respondent's children Visits to No children N 797 Mean Deviation Mean 0.27 1.077 0.038 science museum 1 or more children 2062 1.65 4.997 0.969 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means F Visits to Equal 4.492 Sig. 0.034 -1.231 t df 2857 Sig. (2-tailed) 0.218 science museum variances assumed Equal -1.979 2067.380 0.048 variances not assumed 1. What is the research hypothesis? Is this one-tailed or two-tailed? (note how the problem is worded to indicate if it is one or two tailed)
a 2. You are asked to do a study of shelters for abused and battered women to determine the necessary capacity in your city to provide housing for most of these women. After recording data for a whole year, you find that the mean number of women in shelters each night is 250, with a standard deviation of 75. Fortunately, the distribution of the number of women in the shelters each night is normal , so you can answer the following questions posed by the city council: a. If the city's shelters have a capacity of 350will that be enough places for abused women on 95% of all nights? If not, what number of shelter openings will be needed? b. The current capacity is only 220 openings, because some shelters have been closed. What is the percentage of nights that the number of abused women seeking shelter will exceed current capacity ?
Please provide solution asap and select correct option please ASAP
Supposed the price of paid apps for a certain category is normally distributed with the mean of $3.5 and a standard deviation of $1. Based on the empirical rule, approximately 95% of the apps in that category will have the price between which two values (centred around the mean)?
When a state does not win a representative to another state, though its population is increasing at a quicker rate than that of the other state. ALABAMA Paradox POPULATION Paradox NEW-STATE Paradox Block 101 got a mean of 87.5 with a standard deviation of 3.2 while Block 102 got a mean of 85.1 with a standard deviation of 4.5 in the Comprehensive Final Exam. What statistical measure will best describe the relative measure of dispersion of the two blocks? mean standard deviation coefficient of variation range
A company was concerned about the length of time a particular vitamin they produce retained its potency. Potency was measured for a random sample of 10 bottles that had just been produced and also for a random sample of 10 bottles after 1 year in storage. The resulting data was used to calculate the summary statistics below. Standard n Mean Deviation Newly produced 10 10.37 0.32 Stored for 1 year 10 9.83 0.24 Difference (New - Stored) 10 0.54 0.43
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Two independent laboratories have produced drugs that provide relief to arthritis and the results is shown below. At 5% level of significant, can we conclude that the drug produced by laboratory A significantly causes a shorter period of relief (in Hours) than that of a drug produced by laboratory B? Laboratory Sample Mean Standard Deviation A 75 4.5 2.5 B 60 5.5 2.0
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"
Colonial Funds claims to have a bond fund which has maintained a mean share price of $14.00. They claim that the variance of the share price is 0.18. To test this claim, the investor randomly selects 12 days during the last year. He finds an average share price of $13.80 with a standard deviation of 0.3905. Can the investor conclude that the share price of the bond fund varies from Colonial Funds claims at a = 0.05? Step 1 of 5: State the hypotheses in terms of the standard deviation, Round the standard deviation to four decimal places when necessary. Answer Ho: Ha Tables Keypad Keyboard Shortcuts
A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained from the study is given below. Assume ratings from the different surveys generally have the same standard deviation. Mean Observations Pearson Correlation Hypothesized Mean Difference df t Stat P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail Confidence Level Version A Version B 33.133 28.67 15 15 -0.325 0.00 14 n = Ex: 9 -1.426 0.088 -1.345 0.176 -1.761 95% Degrees of freedom: df Point estimate for Version A: XA = Ex: 1.234 Point estimate for Version B: x B = 1 = من t = −1 Ex: 1.234 0 1 t = P = = Ex: 1.234 2 3 2
1. Find the p-value. (Round to three or more decimal places.) 2. At the 0.01 level of significance, can the doctor conclude that the mean recovery time of patients who have the new procedure is less than the mean recovery time of patients who have the standard procedure?

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