Which of the following t-test confidence intervals indicate that there is a statistically significant difference between groups?

 

-15.23 to 23.12

-2.57 to -1.58

-0.05 to 5.47

-12.87 to 0.03

   

Which of the following confidence intervals would be associated with a p-value of 0.34, assuming an alpha of 0.05?

 

-2.54 to 1.38

-35.23 to -23.72

0.19 to 0.89

-15.05 to -5.47

Each of the following is a confidence interval for average resonance frequency.

(114.4,115.6) y (114.1,115.9)

What is the value of the sample mean? The intervals have levels of confidence of 99% and 90%, which interval has the 90% level of confidence and why?

Confidence intervals and English-language tests for international students (continued): Using the IELTS listening data presented in the previous exercise, practice evaluating data using confidence intervals.

A. Compute the 80% confidence interval.

B. How do the conclusion and the confidence interval change as we move from 95%  confidence to 80% confidence 

C. Why don't we talk about having 100% confidence? What would the confidence interval look like?

(1 point) 1. In a study of red/green color blindness, 850 men and 2450 women are randomly selected and tested. Among the men, 72 have red/green color blindness. Among the women, 5 have red/green color blindness. Test the claim that men have a higher rate of red/green color blindness.

The test statistic is

The p-value is

 Is there sufficient evidence to support the claim that men have a higher rate of red/green color blindness than women using the 0.01% significance level?

A. Yes

B. No

2. Construct the 99% confidence interval for the difference between the color blindness rates of men and women.

Which of the following is the correct interpretation for your answer in part 2?

A. We can be 99% confident that the difference between the rates of red/green color blindness men and women lies in the interval

B. There is a 99% chance that the difference between the rates of red/green color blindness men and women lies in the interval

C. We can be 99% confident that the difference between the rates of red/green color blindness men and women in the sample lies in the interval

D. None of the above.