a three rows by four columns cross-tabulation table of a chi-square test f dependence, what is the critical chi-square value in a hypothesis test conc t the 10% level of significance?
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- Test the claim that the proportion of men who own dogs is smaller than the proportion of women who own dogs at the .005 significance level. Based on a sample of 80 men, 40% owned dogsBased on a sample of 80 women, 60% owned dogs Critical Value = Test Statistic = Based on this do we reject the null hypothesis or fail to reject the null hypothesis?You are conducting a study to see if the proportion of men over 50 who regularly have their prostate examined is significantly less than 0.15. You use a significance level of a =0.02. Ho:p= 0.15 H1:p < 0.15 You obtain a sample of sizen= 504 in which there are 60 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. O less than (or equal to) a O greater than a This test statistic leads to a decision to... O reject the null O accept the null O 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 men oven 50 who regularly have their prostate examined is less than 0.15. There is not sufficient evidence to warrant rejection of the claim that the proportion of men over 50 who regularly have their prostate examined is…NT #2 You wish to test if the proportion of adults in a small town who are fully vaccinated differs from 55%. You select a random sample of 258 adults in this town and find that 120 of them are fully vaccinated. Set up an appropriate hypothesis test, calculate the p-value and state your conclusion. Use a significance level of a = .01.
- An educational psychologist is examining response times to an on-screen stimulus. The researcher believes there might be a weak effect from age, but expects a more pronounced effect for different color contrasts. She decides to examine a black on white (B/W) combination compared to 2 alternatives: red on white (R/W) and yellow on blue (Y/B). Here is the data for response times (in milliseconds): Color Scheme B/W R/W Y/B 10 17 23 26 44 44 22 21 25 22 21 4 16-17 11 32 34 31 24 20 16 20 21 36 8 8 24 37 23 11 39 36 23 17 28 32 36 31 Age 18-19 19 15 45 15 35 36 13 47 23 16 19 31 24 30 25 16 40 16 27 25 42 23 28 35 20-21 21 18 42 27 19 39 39 28 27 18 26 38 Using MS Excel, conduct a 2-way ANOVA with a = 0.05. Fill in the summary table. The last column in the table below is read as, "Partial Eta-squared " and is a concept that was NOT covered in the lectures. Partial n2 is used when there is a chance the data is not independent (click here to read more if interested 2) Computing the values for…P-values should be accurate to 4 decimal places and all other values accurate to 3 decimal places. Source S df MS F-ratio P-value Partial n? Age (A) 2 Color (B) Interaction (A × B) 4 Error 63 Provide the conclusions for this 2-way ANOVA. What is the conclusion regarding the main effect for age (A or rows): O There appears to be an effect due to age. O There is not enough evidence to reject the assumption that the marginal means across age groups are equal. What is the conclusion regarding the main effect for color (B or columns): There appears to be an effect due to color. There is not enough evidence to reject the assumption that the marginal means across color groups are equal. What is the conclusion regarding an interaction effect between age and color (A x B): There appears to be an interaction effect between age and color. There is not enough evidence to reject the assumption of a lack of an interaction.review(8a): Identify the test statistic used for the ANOVA prodcedure and how it is calculated (a) the test statistic is F and is calculated by finding the difference between group means (b)the test staitistic is z and is calculated by finding the mean z score between groups. (c) the test statistic is F and is the ratio of the variation getween groups to the variation within groups. (d) the test statistic is z and is the ratio of the mean within a group to the variation between groups
- Answer letter a, use image two as a guide to determine the test to be used and provide a justificationDiet Regular Data on the weights (Ib) of the contents of cans of diet soda versus the contents of cans of the regular version of the soda is summarized to the right. Use a 0.05 significance level. P2 21 21 0.79292 Ib 0.80886 Ib 0.00754 lb 0.00441 Ib Test the claim that the contents of cans of diet soda have weights with a mean that is less than the mean for the regular soda. What are the null and altemative hypotheses? O A. Ho: H1 = H2 H: 41 > H2 O B. Ho: H1 = H2 H: H H2 O C. Ho: Hi # Hz Hq:HqYou are conducting a study to see if the proportion of voters who prefer Candidate A is significantly more than 0.34. You use a significance level of a = 0.001 Ho:p = 0.34 H1:p > 0.34 You obtain a sample of sizen = 266 in which there are 114 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... O less than (or equal to) x O greater than a This test statistic leads to a decision to... O reject the null O accept the null O 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 voters who prefer Candidate A is more than 0.34. O There is not sufficient evidence to warrant rejection of the claim that the proportion of voters who prefer Candidate A is more than 0.34. O The sample data support the claim that the…