If a researcher conducted a 2-tailed , non-directional hypothesis test with an alpha leve4l of .02 , what would be the corresponding critical value z-score(s)?
a. -2.32
b.+2.325 and -2.325
c. +1.96 and -1.96
d. +2.055 and -2.055
If a researcher conducted a 2-tailed , non-directional hypothesis test with an alpha leve4l of .02...
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment effect with ( a = .05). if the sample data produce a Z-score of ( z= -2.24), what is the correct decision? A. Reject the null hypothesis and conclude that the treatment has no effect B. Reject the null hypothesis and conclude that the treatment has an effect C. Fail to reject the null Hypothesis and conclude that the treatment has no effect D....
In a two tailed (non-directional) t-test, if the null hypothesis is true, what is the t value ? 0? 10? -2? or not equal to 0?
What is the critical t value (one sample t-test) for a non directional hypothesis with an alpha level of .05 and a sample size of 30? A. t-critical is 1.699 B. t critical is 2.045 C. t critical is 2.042 D. t critical is 2.457
Question 8 3 pts The a two-tailed hypothesis test Is related to a confidence interval at the same level of alpha. All of the answers are true. Is expressed in a probability framework with a chance of being wrong in our conclusion. Has an alternative hypothesis that uses Not Equal in the expression For this problem you will need a t-table. What is the t-value needed for the critical value for a one-tailed upper hypothesis test with a sample size...
In a difference of proportion test with alpha = .05, the critical values(s) for a two-tailed test is/are -2.575 and 2.575 1.96 -1.645 and 1.645 -1.96 and 1.96 If the test statistic for a difference of means test has a p-value of .065, we could reject the Null Hypothesis at an alpha level of.10. True False
A researcher carried out a hypothesis test using a two-tailed alternative hypothesis. Which of the following test statistics is associated with the smallest P-value? Select one: a. Z-0.50 b. Zo - 1.00 c. Z -2.00 d. Z - 3.00
Using a two-tailed one-sample z-test from a sample of size n, a researcher rejects the null hypothesis as z = 2.0 is greater than the critical value 1.96 at α = .05. What does this mean? Choose ALL the correct options from the following. a. As α = .05, the probability that the null hypothesis is correct is less than 5% b. As α = .05, the probability that the alternative / research hypothesis is correct is more than 95%...
A. A left tailed hypothesis test with n > 30 and α = 2.5% will have a critical value of? B. A right tailed hypothesis test with n > 30 and α = 1% will have a critical value of ? C. A hypothesis test with a test statistic of z = -1.89 and a critical value of z = - -1.345 will have a conclusion to ? D. A hypothesis test with a critical value of z = 1.78...
1. Regarding a two-tailed z-test with an alpha of 0.05, we would need a Zobt with an absolute value less than 1.96 in order to reject the null hypothesis. True or False? 2. What happens to the probability of committing a Type I error if the level of significance is changed from α = 0.05 to α = 0.01? A. It increases B. It decreases C. It stays the same D. Cannot determine 3. Given a Zobt of -1.99 ,...
4) A researcher is testing a hypothesis of a single mean. The critical z value for α = .05 and a two tailed test is ±1.96. The observed z value from sample data is minus2.11. The decision made by the researcher based on this information is to _____ the null hypothesis. reject fail to reject redefine change the alternate hypothesis into restate 5) A researcher is testing a hypothesis of a single mean. The critical z value for α =...