Confidence intervals indicate
the confidence level used to reject the null hypothesis |
the range of values included in the sample |
a range of values that could contain the population mean |
the range of values that could equal the sample’s actual mean |
Confidence interval provides a range of values that can contain the population parameter.
Option C is correct.
Confidence intervals indicate the confidence level used to reject the null hypothesis the range of values...
Is there a relationship between confidence intervals and two-tailed hypothesis tests? Let c be the level of confidence used to construct a confidence interval from sample data. Let α be the level of significance for a two-tailed hypothesis test. The following statement applies to hypothesis tests of the mean. For a two-tailed hypothesis test with level of significance α and null hypothesis H0: μ = k, we reject H0 whenever k falls outside the c = 1 − α confidence...
Q1 If a null hypothesis is rejected at the 0.10 level of significance, it.... a)must be rejected at the 0.05 level b) may be rejected at the 0.05 level c) will not be rejected at the 0.05 level d) must be rejected at the 0.025 level Q2) the precision of confidence intervals is related to... a) the sample size and the confidence level b) the mean of the population and the confidence level c) the mean of the sample and...
Question 15 This distribution is used for confidence intervals with large samples. χ² Z T F Question 16 You can reject a null hypothesis at the .01 alpha level and fail to reject it at the .05 alpha level. True False Question 17 When nominal data are categorized, no overlapping can occur. We refer to these categories as being what? fill in the blank Question 18 Explain the difference between interval and ratio level data in your own words. Provide...
Confidence intervals may help decision makers by showing the potential range of values that the actual population measure(s) could be. True or False?
1. You want to test whether you can reject the null hypothesis that a population mean is greater than or equal to 10. To do this, you collect a random sample of size 500 from the population, and you calculate that the sample mean and sample standard deviation are 8.6 and s, respectively. Which of the following is true? a. If s is any value between 11 and 13, you can reject the null hypothesis at the 5% significance level....
A: If 550 confidence intervals, each having a level of confidence of 96%, were computed for a population mean μ, approximately how many of the intervals would be expected to contain μ? (Round your answer to the nearest integer.) B: If 310 confidence intervals, each having a 95% level of confidence, were computed for a population mean μ, about how many of the intervals can be expected to contain μ? (Your answer will be an integer, of course.)
In testing hypotheses, if the consequences of failing to reject a null hypothesis that is actually false are very serious, we should: A. Insist that the level of significance be smaller than the P-value Buse a very small level of significance. C. insist that the P-value be smaller than the level of significance. OD. use a very large level of significance. 1.5 QUESTION 36 A 99% confidence interval for the mean y of a population is computed from a random...
true or false 11. When the level of confidence and the sample size remain the same, a confidence interval for a population mean y will be narrower, when the sample standard deviation s is smaller than when s is larger. Chapter 10 12. The closer is the hypothesized mean is from the actual mean the higher is the power of the test. 13. The manager of the quality department for a tire manufacturing company wants to know the average tensile...
Which of the following p-values will lead us to reject the null hypothesis if the level of significance a a. 0.05 b. 00.20 c. 0.025s d. 0.10 0.25
A 95% confidence interval for a population mean is (28, 38). Can you reject the null hypothesis that μ = 24 at the 5% significance level? (Possible answers: Yes, No, Unable to determine).