In a chi-squared goodness of fit test, the test statistic value was x = 28.44, and the critical value at a = 0.01 was 15.09.Thus:O a. None of the above.O b. We reject the null hypothesisOc. We fail to reject the null hypothesisod. There is not enough evidence to accept or reject the null hypothesis

Rejection of hypothesis take place when the statistic falls umder rejection region

Answered: In a chi-squared goodness of fit test,…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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A one sample, one-tail t-test is conducted and the test statistic value is calculated to be 2.56. The degrees of freedom for the test are 10. Which of the following conclusions for the test would be correct? A. the null hypothesis can be rejected at the 2.5% level of significance B. the null hypothesis can be rejected at the 1% level of significance C. the null hypothesis can be rejected at the 5% level of significance D. both A and B are correct conclusions E. both A and C are correct conclusions Please explain. Thank you
Find the value of the standard score, z, and determine whether to reject the null hypothesis at a 0.10 significance level. Is the alternative hypothesis supported? Ho: p= 19.6 seconds, H: p> 19.6 seconds, n = 121, x=20 5 seconds, o = 2.0 seconds a The value of the standard score is (Round to two.decimal places as needed.)
After performing a hypothesis test, the p-value is p = 0.013. If the test was performed at a significance level of a = 0.046, should the null hypothesis be rejected? O a. Reject the null hypothesis since 0.013 0.046 O c. Reject the null hypothesis since 0.013 > 0.046 O d. Fail to reject the null hypothesis since 0.013 < 0.046
Only about 15% of all people can wiggle their ears. Is this percent higher for millionaires? Of the 352 millionaires surveyed, 60 could wiggle their ears. What can be concluded at the a = 0.05 level of significance? a. For this study, we should use z-test for a population proportion v b. The null and alternative hypotheses would be: Ho: pv Select an answer v (please enter a decimal) H: pv Select an answer v (Please enter a decimal) c. The test statistic z v (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 3 decimal places.) e. The p-value is > vV a f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population proportion is not significantly higher than 15% at a = 0.05, so there is statistically insignificant evidence to conclude that the population proportion of millionaires who can wiggle their ears is higher than 15%. O The data suggest the population…
The mean age of a bus driver in Chicago is 47.4 years. If a hypothesis test is performed to test the validity of this statement, how should you interpret a decision that rejects the null hypothesis?
a. State the null and research hypotheses: H0: H1: b. Is the F statistic for Levene’s test significant? c. What is the alpha level for the t-test? d. Obtained t-value: e. Significance level for the t-test: f. Decision rule: If the significance level of the obtained t statistic is greater than ____ (alpha level), we fail to reject the null hypothesis. If the significance level of the obtained t statistic is equal to or less than ____ (alpha level), we reject the null hypothesis. g. Decision: Since the significance level of the obtained t statistic is _____ and it is __________(greater or less) than ____ (alpha level), we ________(reject or fail to reject) the null hypothesis. h. Interpretation/conclusion:
A test of the null hypothesis Ho: p = .25 gives a test statistic z = 1.6. What is the p-value if the alternative is Ha: p > .25? What is the p-value if the alternative is Ha: p < .25? What is the p-value if the alternative is Ha: p .25?
A random sample contains 30 observations. Determine the p-value for each value of the calculated test statistic below and state your decision about the null hypothesis in each part by comparing the p-value to a=0.10. Null Hypothesis: u=38 Alternative Hypothesis: u does not equal 38 a) t=1.311 b) t=2.045 c) t=-1.4421
The critical boundaries for a hypothesis test are z = +1.96 and z = -1.96. If the z-score for the sample data is z = -1.90, which is the correct statistical decision? a. fail to reject H1 b. fail to reject H0 c. reject H0 d. reject H1
find the p-value for the test statistic z=1.84 for the following null and alternative hypotheses: Ho: the population mean is 8 Ha: the population mean is less than 8
e. Consider the following hypothesis test. H: 4, - H, = 0 H.:H,- H, #0 The following results are for two independent samples taken from the two populations. Sample 1 n, = 70 x; =106 o, = 8.4 a. What is the value of the test statistic? Sample 2 n, = 80 x, =108 0z = 7.6 b. What is the p-value? c. With a=0.01 , using the p-value approach, what is your hypothesis testing conclusion? Why? Explain.
Use a-e to answer 12 not 11

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