A single sample t-test conducted on a sample of n = 20 participants produces a t statistic of t = 2.53. For a two-tailed test, what is the correct decision about the outcome of the test? A. The researcher can reject the null hypothesis with α = .05 but not with α = .01. B. The researcher can reject the null hypothesis with α = .01 but not with α = .05. C. The researcher must fail to reject the null hypothesis with either α = .05 or α = .01. D. The researcher can reject the null hypothesis with either α = .05 or α = .01.
Added by Eileen G.
Step 1
Since we have a sample size of n = 20, df = n - 1 = 19. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Prabhakar Kumar and 61 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A sample of n = 25 scores produces a t statistic of t = -2.062. If the researcher is using a two-tailed test, which of the following is the correct statistical decision? Group of answer choices: A. The researcher can reject the null hypothesis with alpha = .05 but not with alpha = .01. B. The researcher must fail to reject the null hypothesis with either alpha = .05 or alpha = .01. C. It is impossible to make a decision about H0 without more information. D. The researcher can reject the null hypothesis with either alpha = .05 or alpha = .01.
Qudsiya A.
A researcher obtains t = -2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test? Group of answer choices a.) fail to reject the null hypothesis with both α = .05 and α = .01 b.) reject the null hypothesis with α = .05 but not with α = .01 c.) reject the null hypothesis with both α = .05 and α = .01 d.) fail to reject the null hypothesis with α = .05 but not with α = .01
T. L.
A researcher selects a sample from a population with a mean of μ = 40 and administers a treatment to the individuals in the sample. If the treatment is expected to decrease scores, which of the following is the correct statement of the null hypothesis for a one-tailed test? a. The researcher must fail to reject the null hypothesis with either α = .05 or α = .01. b. It is impossible to make a decision about H0 without more information. c. The researcher can reject the null hypothesis with α = .05 but not with α = .01. d. The researcher can reject the null hypothesis with either α = .05 or α = .01.
Maitreya E.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD