xy?Aplia: Student Question https://courses aplia.com 5 Chegg study l Guided So a

Question

xy?Aplia: Student Question https://courses aplia.com 5 Chegg study l Guided So atistics for the Behavic × c secure afse vlet/quiz? tx cansorge0057&quiz; action takeOuiz&quizpro; Guid-????? ? O1010000 0414d8ed0b000R 6. A one-tailed hypothesis test for a repeated-measures design AaAa? A researcher is interested in whether blind Braille readers could be taught to read faster using the same techniques as sighted readers. She has blind adults complete a reading speed test before and after a six-week speed-reading course In the beginning of the study, a randomly selected group of 121 blind Braille readers scored an average of 261 words per minute on the reading speed test. Since the sample size is larger than 30, the researcher can assume that the sampling distribution of Mo is normal. She plans to use a repeated-measures t-test. The researcher identifies the null and alternative hypotheses as: Ho: Ho Use the Distributions tool to find the critical region(s) for a .05. The critical t-score, which is the value for t-scores that separates the tail(s) from the main body of the distribution and forms the critical region(s), is consider whether this is a one-tailed or two-tailed test.) (Hint: Remember to set the degrees of freedom on the tool and to Distribution Degrees of Freedom-115

Explanation / Answer

H0: muo = 0
H1: muo > 0

Let the los be alpha = 5%

Critical value t = 1.658 at 5% los in one tail and 121-1=120 df

Standar error = 21 / sqrt(121) = 1.9091

Test Statistic t = 7 / 1.9091 =3.6667

The t statistic is in the t critcal region for a one tailed test.
Therefore, the null hypothesis is rejected.
The researcher is valid conclude that the speed -reading course increases speed of reading Braille

Related Questions

Navigate

• Browse (All)
• Browse X
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.