You're running a one-sample t-test comparing your sample (? = 38.4, ?? = 4.6) of 27...
You're running a one-sample t-test comparing your sample (? = 38.4, ?? = 4.6) of 27 observations with a population that has μ = 39.7 at ? = 0.001. Calculate ?_??? ________ , your confidence interval: ______ to ______ , and your decision regarding the null hypothesis (reject/fail to reject):__________
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You're running a one-sample t-test comparing your sample (? =
38.4, ?? = 4.6) of 27...
You're running a one-sample t-test comparing your sample (? = 30.5, ?? = 1.2) of 21...
You're running a one-sample t-test comparing your sample (? = 30.5, ?? = 1.2) of 21 observations with a population that has μ = 29.6 at ? = 0.01. Calculate ?_???_____ , your confidence interval:_____ to________ , and your decision regarding the null hypothesis (reject/fail to reject):______
A researcher runs a one-sample, one-sided t-test, and finds that t = 1.93, df = 21,...
A researcher runs a one-sample, one-sided t-test, and finds that t = 1.93, df = 21, α = .05, where: H 0: μ = 12 H 1: μ > 12 What decision should be made regarding the hypothesis? -Reject the null hypothesis. -Reject the alternative hypothesis. -Fail to reject the null hypothesis. -Fail to reject the alternative hypothesis.
A sample of 31 observations is selected from a normal population. The sample mean is 11, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.05 significanc...
A sample of 31 observations is selected from a normal population. The sample mean is 11, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.05 significance level. H0: μ ≤ 10 H1: μ > 10 Is this a one- or two-tailed test? One-tailed test Two-tailed test What is the decision rule? Reject H0 when z > 1.645 Reject H0 when z ≤ 1.645 What is the value of the test statistic? (Round your...
The one-sample t statistic from a sample of n = 21 observations for the two-sided test...
The one-sample t statistic from a sample of n = 21 observations for the two-sided test of H0: μ = 60, Ha: μ ≠ 60 has the value t = –1.98. Based on this information: we would reject the null hypothesis at α = 0.05. All of the answers are correct. 0.025 < P-value < 0.05. we would reject the null hypothesis at α = 0.10
Run a one sample t-test for HGHTI_P to test if the CHIS sample is significantly different...
Run a one sample t-test for HGHTI_P to test if the CHIS sample is significantly different from 68(the average height in the U.S.). What can you conclude based on the results of your test (Hint: what does the p-value tell you?)? Do you reject the null hypothesis, or fail to reject the null hypothesis? Does the CHIS sample population have a statistically significant different average height than 68 inches tall?
You conduct a hypothesis test for the population mean. After you calculate the t test statistic,...
You conduct a hypothesis test for the population mean. After you calculate the t test statistic, you find that your p-value = 0.04. Using alpha (a) = 0.01 level of significance, what is your decision regarding the null hypothesis? (either reject Ho and accept Ha, or fail to reject Ho)
A sample of 37 observations is selected from a normal population. The sample mean is 21,...
A sample of 37 observations is selected from a normal population. The sample mean is 21, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.02 significance level. H0: μ ≤ 20 H1: μ > 20 Is this a one- or two-tailed test? One-tailed test Two-tailed test What is the decision rule? Reject H0 when z > 2.054 Reject H0 when z ≤ 2.054 What is the value of the test statistic? (Round your...
A sample of 36 observations is selected from a normalpopulation. The sample mean is 49,...
A sample of 36 observations is selected from a normal population. The sample mean is 49, and the population standard deviation is 5. Conduct the following test of hypothesis using the 0.05 significance level.H0: μ = 50H1: μ ≠ 50Is this a one- or two-tailed test?One-tailed testTwo-tailed test doneWhat is the decision rule?Reject H0 if −1.96 < z < 1.96Reject H0 if z < −1.96 orz > 1.96 doneWhat is the value of the test statistic? (Negative amount should be...
INFERENCES ABOUT THE POPULATION MEAN DISTINGUISH BETWEEN Z-TEST AND T-TEST. 1. A GROUP OF 9 STORE...
INFERENCES ABOUT THE POPULATION MEAN DISTINGUISH BETWEEN Z-TEST AND T-TEST. 1. A GROUP OF 9 STORE MANAGERS WAS DRAWN FOR ANALYSIS OF THEIR IQ SCORES. ASSUME THAT INDIVIDUAL SCORES ARE NORMALLY DISTRIBUTED, WITH THE UNKNOWN POPULATION AVERAGE AND POPULATION STANDARD DEVIATION OF 15. SAMPLE SUMMARIES WERE: (SAMPLE MEAN) = 88.2 AND (SAMPLE STANDARD DEVIATION) = 12. (A) AT THE 1% SIGNIFICANCE LEVEL, DO WE HAVE SUFFICIENT EVIDENCE THAT THE POPULATION AVERAGE IQ WAS BELOW 100? CIRCLE ONE: YES! || NO!...
Conduct an independent samples t-test (a.k.a., between-subjects design). Each sample should have at least n=8 indivi...
Conduct an independent samples t-test (a.k.a., between-subjects design). Each sample should have at least n=8 individuals. What to turn in: 1. What is your research question? 2. State the null (Ho) and alternative (H1) hypotheses. 3. Conduct the hypothesis test using an alpha level of .05, and state your conclusion (Reject Ho/Fail to Reject Ho) regarding the original hypotheses. 4. Calculate and interpret a measure of effect size (est. Cohen's d or r2) and a 95% confidence interval.
Conduct an independent samples t-test (a.k.a., between-subjects design). Each sample should have at least n=8 individuals. What to turn in: 1. What is your research question? 2. State the null (Ho) and alternative (H1) hypotheses. 3. Conduct the hypothesis test using an alpha level of .05, and state your conclusion (Reject Ho/Fail to Reject Ho) regarding the original hypotheses. 4. Calculate and interpret a measure of effect size (est. Cohen's d or r2) and a 95% confidence interval.
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