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(1 point) In each question below, we have given the relative frequencies for the null hypothesis...
(1 pt) In each question below, we have given the relative frequencies for the null hypothesis...
(1 pt) In each question below, we have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. In each case, decide whether the two assumptions for using that test are satisfied Assumption 1: All expected frequencies are 1 or greater Assumption 2: At most 20 percent of the expected frequencies are less than 5 Sample size: n 100, Relative frequencies: 0.65, 0.30, 0.05 A. Only assumption 1 is satisfied B. Both assumptions...
Which step should be taken next if the null hypothesis is rejected in a chi-square test?...
Which step should be taken next if the null hypothesis is rejected in a chi-square test? OA. O B. Create confidence intervals to estimate the differences. Examine the standardized residuals to understand the pattern C. Check that the conditions are satisfied. D. Plot the data on a chart to understand the pattern. Which of the following is NOT one of the tests discussed in Chapter 16? A Chi-square test for independence B. Chi-square goodness-of-fit test OC. CH-square test for contingency...
The name given to goodness of fit test was derived based on the hypothesis tested and...
The name given to goodness of fit test was derived based on the hypothesis tested and how good the observed frequencies fit a given pattern. To make a goodness of fitness test, the sample size should be large enough so that the expected frequency for each category is at least 5. There are four commonly used goodness of fit tests: The Chi-Square, Kolmogorov-Smirnov, Anderson-Darling, and Shipiro-Wilk. Observed frequencies, denoted by O, are counts made from experimental data - whereby you...
If a null hypothesis is rejected at a significance level of 1%, then we should say...
If a null hypothesis is rejected at a significance level of 1%,
then we should say that it was rejected at 1%. Reporting that the
null was also rejected at the 5% level of significance is
unnecessary and unwise.
True
False
The p-value equals alpha, the level of significance of the
hypothesis test.
True
False
THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING
INFORMATION:
Let X1, X2,
X3, and X4 be a random
sample of observations from a population with...
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...
Question 1 of 4 For the following observed and expected frequencies: Observed 39 43 42 109 Expected 38 48 45 S 6 Download data Test the hypothesis that the distribution of the observed fr...
Question 1 of 4 For the following observed and expected frequencies: Observed 39 43 42 109 Expected 38 48 45 S 6 Download data Test the hypothesis that the distribution of the observed frequencies is as given by the expected frequencies. Use thea -0.025 level of significance and theP-value method with the TI-84 calculator Part 1 State the null and alternate hypotheses. Ho: The distribution of the observed frequencies ts H1: The distribution of the observed frequencies differs from that...
Question Completion Status: QUESTION 2 The Null Hypothesis (HO): O The two categorical variables are independent...
Question Completion Status: QUESTION 2 The Null Hypothesis (HO): O The two categorical variables are independent Op1 = P2 = ... = Pg, where g = 4 Homogeneity of distribution of a categorical response Goodness-of-fit test QUESTION 3 Significance level: a = a=0.05 Which test statistic would we use for the test? X-MO 2 = P - Po po(1-P) F = t= MSG MSE x-1 (0-1) E s/n (a) 72 (b) (c) (d) O 1.a O2.b O3.c 04.0 QUESTION 4...
To test Ho: u = 105 versus Hy: # 105 a simple random sample of size...
To test Ho: u = 105 versus Hy: # 105 a simple random sample of size n= 35 is obtained. Complete parts a through e below. Click here to view the t-Distribution Area in Right Tail. (a) Does the population have to be normally distributed to test this hypothesis? Why? O A. No, because the test two-tailed OB. Yes, because n 2 30. OC. No, because n 2 30. OD. Yes, because the sample random (b) If x= 101.9 and...
a) Find the expected counts in each category using the given sample size and null hypothesis....
a) Find the expected counts in each category using the given sample size and null hypothesis. H0:p1=0.7,p2=0.1,p3=0.1,p4=0.1;n=400 Enter the exact answers. Category 1 2 3 4 Expected count Enter your answer; Expected count, Category 1 Enter your answer; Expected count, Category 2 Enter your answer; Expected count, Category 3 Enter your answer; Expected count, Category 4 b) Find the expected counts in each category using the given sample size and null hypothesis. H0: All three categories A, B, C are...
Are the four predominant ethnicities in a town equally represented? A random sample of 13,442 town...
Are the four predominant ethnicities in a town equally represented? A random sample of 13,442 town inhabitants is taken and are asked to identify themselves according to one of the following four ethnicities: 1 = Caucasian, 2 = African-American, 3 = Mexican American, 4 = Taiwanese-American. Does this sample provide evidence that the four races are equally represented in the town? A partial Minitab output for this question is below. Chi-Square Goodness-of-Fit Test for Categorical Variable: Ethnicity Test Category observed...
(1 pt) In each question below, we have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test and the sample size. In each case, decide whether the two assumptions for using that test are satisfied Assumption 1: All expected frequencies are 1 or greater Assumption 2: At most 20 percent of the expected frequencies are less than 5 Sample size: n 100, Relative frequencies: 0.65, 0.30, 0.05 A. Only assumption 1 is satisfied B. Both assumptions...
Which step should be taken next if the null hypothesis is rejected in a chi-square test? OA. O B. Create confidence intervals to estimate the differences. Examine the standardized residuals to understand the pattern C. Check that the conditions are satisfied. D. Plot the data on a chart to understand the pattern. Which of the following is NOT one of the tests discussed in Chapter 16? A Chi-square test for independence B. Chi-square goodness-of-fit test OC. CH-square test for contingency...
If a null hypothesis is rejected at a significance level of 1%,
then we should say that it was rejected at 1%. Reporting that the
null was also rejected at the 5% level of significance is
unnecessary and unwise.
True
False
The p-value equals alpha, the level of significance of the
hypothesis test.
True
False
THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING
INFORMATION:
Let X1, X2,
X3, and X4 be a random
sample of observations from a population with...
Question 1 of 4 For the following observed and expected frequencies: Observed 39 43 42 109 Expected 38 48 45 S 6 Download data Test the hypothesis that the distribution of the observed frequencies is as given by the expected frequencies. Use thea -0.025 level of significance and theP-value method with the TI-84 calculator Part 1 State the null and alternate hypotheses. Ho: The distribution of the observed frequencies ts H1: The distribution of the observed frequencies differs from that...
Question Completion Status: QUESTION 2 The Null Hypothesis (HO): O The two categorical variables are independent Op1 = P2 = ... = Pg, where g = 4 Homogeneity of distribution of a categorical response Goodness-of-fit test QUESTION 3 Significance level: a = a=0.05 Which test statistic would we use for the test? X-MO 2 = P - Po po(1-P) F = t= MSG MSE x-1 (0-1) E s/n (a) 72 (b) (c) (d) O 1.a O2.b O3.c 04.0 QUESTION 4...
To test Ho: u = 105 versus Hy: # 105 a simple random sample of size n= 35 is obtained. Complete parts a through e below. Click here to view the t-Distribution Area in Right Tail. (a) Does the population have to be normally distributed to test this hypothesis? Why? O A. No, because the test two-tailed OB. Yes, because n 2 30. OC. No, because n 2 30. OD. Yes, because the sample random (b) If x= 101.9 and...
Are the four predominant ethnicities in a town equally represented? A random sample of 13,442 town inhabitants is taken and are asked to identify themselves according to one of the following four ethnicities: 1 = Caucasian, 2 = African-American, 3 = Mexican American, 4 = Taiwanese-American. Does this sample provide evidence that the four races are equally represented in the town? A partial Minitab output for this question is below. Chi-Square Goodness-of-Fit Test for Categorical Variable: Ethnicity Test Category observed...
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