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What is the purpose of a goodness-of-fit test? a) To assess whether there is a significant...
1. What is the purpose of a goodness-of-fit test? a.) To assess whether there is a...
1. What is the purpose of a goodness-of-fit test? a.) To assess whether there is a significant difference between a collection of categorical data b.) To find relationships in the data c.) To assess whether several categorical variables are related d.) To assesses whether the central tendency, variability and distribution of sample is different from that of the population 2. Suppose you are testing the following hypothesis pair: ?0: ? ≤ 100 vs. ?1: ? > 100. A sample average...
Suppose that you are testing the following hypotheses: Ho: = 10 and 11: > 10. If...
Suppose that you are testing the following hypotheses: Ho: = 10 and 11: > 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 sus 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the mean exceeds zero. If...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and H :> 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 <u< 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the...
1. A researcher intends to use a Chi2 test for Goodness of Fit to determine whether...
1. A researcher intends to use a Chi2 test for Goodness of Fit to determine whether there is any preference between 10 brands of cookies. What is the critical Chi2 value for a sample of n = 300 participants and p < .01? A. 20.48 B. 11.07 C. 16.92 D. 18.31 E. 21.67 2. A researcher conducted a study on a sample of n = 80 undergraduates to evaluate preferences among students for four different textbooks for the Introduction to...
Use α = .01 and conduct a goodness of fit test to see whether the following...
Use α = .01 and conduct a goodness of fit test to see whether the following sample appears to have been selected from a normal probability distribution. Use Table 12.4 55 86 94 58 55 95 55 52 69 95 90 65 87 50 56 55 57 98 58 79 92 62 59 88 65 Compute the value of the test statistic (to 2 decimals). The p value is less than.005 What is your conclusion? The data does not come...
RuPaul is using a Chi Square Goodness of Fit test to determine whether there are any...
RuPaul is using a Chi Square Goodness of Fit test to determine whether there are any preferences among four fan-favorite drag queens (Monét X Change, Farrah Moan, Monique Heart, and Manila Luzon). If she computed a Chi Square value of 4.6 from a sample size of 60, what would be Cohen's w?
Use α- 01 and conduct a goodness of fit test to see whether the following sample...
Use α- 01 and conduct a goodness of fit test to see whether the following sample appears to have been selected from a normal pro abili distribution se Table 12.4 55 86 94 58 55 95 55 52 69 95 90 65 87 50 56 55 57 98 58 79 92 62 59 88 65 Compute the value of the test statistic (to 2 decimals). The p value is between.01 and.025 What is your conclusion? cannot reject assumption that the...
QUESTION 5 In a goodness-of-fit test to see if a set of 100 values were randomly drawn from a nor...
QUESTION 5 In a goodness-of-fit test to see if a set of 100 values were randomly drawn from a normal distribution, the quartiles and median (i.e., the 0.25, 0.5, and 0.75 quantiles) for the normal distribution were used to determine intervals for sorting the data. What is the expected number of values that fall into each interval assuming the 100 numbers were drawn from the normal distribution? QUESTION 6 Consider again the goodness-of-fit described in the previous problem. Assuming that...
6. We want to test whether there is an equal ratio of freshman to sophomores to...
6. We want to test whether there is an equal ratio of freshman to sophomores to juniors to seniors at UC Davis. I perform a Goodness of Fittest and to reject the null hypothesis then a. the sample distribution was extremely uneven across dasses b. we conclude that the ratio in the null hypothesis is plausible c. we know the test statistic was larger than the critical value d. we know the degrees of freedom for the test was 7....
You are conducting a multinomial Goodness of Fit hypothesis test for the claim that the 4 categor...
You are conducting a
multinomial Goodness of Fit hypothesis test for the claim that the
4 categories occur with the following frequencies: H o : p A = 0.3
; p B = 0.1 ; p C = 0.1 ; p D = 0.5 Complete the table. Report all
answers accurate to three decimal places. Category Observed
Frequency Expected Frequency A 50 B 38 C 19 D 66 What is the
chi-square test-statistic for this data? χ 2 = What...
Suppose that you are testing the following hypotheses: Ho: = 10 and 11: > 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 sus 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the mean exceeds zero. If...
Bonus (5 points) Suppose that you are testing the following hypotheses: Ho: 4 = 10 and H :> 10. If the null hypothesis is rejected at the 1% level of significance, what statement can you make about the confidence interval on the mean? a) The lower bound of a 95% one-sided confidence interval on the mean exceeds 10. b) 9 <u< 13 c) No statement can be made. d) The lower bound of a 95% one-sided confidence interval on the...
Use α = .01 and conduct a goodness of fit test to see whether the following sample appears to have been selected from a normal probability distribution. Use Table 12.4 55 86 94 58 55 95 55 52 69 95 90 65 87 50 56 55 57 98 58 79 92 62 59 88 65 Compute the value of the test statistic (to 2 decimals). The p value is less than.005 What is your conclusion? The data does not come...
Use α- 01 and conduct a goodness of fit test to see whether the following sample appears to have been selected from a normal pro abili distribution se Table 12.4 55 86 94 58 55 95 55 52 69 95 90 65 87 50 56 55 57 98 58 79 92 62 59 88 65 Compute the value of the test statistic (to 2 decimals). The p value is between.01 and.025 What is your conclusion? cannot reject assumption that the...
QUESTION 5 In a goodness-of-fit test to see if a set of 100 values were randomly drawn from a normal distribution, the quartiles and median (i.e., the 0.25, 0.5, and 0.75 quantiles) for the normal distribution were used to determine intervals for sorting the data. What is the expected number of values that fall into each interval assuming the 100 numbers were drawn from the normal distribution? QUESTION 6 Consider again the goodness-of-fit described in the previous problem. Assuming that...
6. We want to test whether there is an equal ratio of freshman to sophomores to juniors to seniors at UC Davis. I perform a Goodness of Fittest and to reject the null hypothesis then a. the sample distribution was extremely uneven across dasses b. we conclude that the ratio in the null hypothesis is plausible c. we know the test statistic was larger than the critical value d. we know the degrees of freedom for the test was 7....
You are conducting a
multinomial Goodness of Fit hypothesis test for the claim that the
4 categories occur with the following frequencies: H o : p A = 0.3
; p B = 0.1 ; p C = 0.1 ; p D = 0.5 Complete the table. Report all
answers accurate to three decimal places. Category Observed
Frequency Expected Frequency A 50 B 38 C 19 D 66 What is the
chi-square test-statistic for this data? χ 2 = What...
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