Use the Distributions tool to find the critical region(s) for -01. The critical

Question

Use the Distributions tool to find the critical region(s) for -01. 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 Degrees of Freedom-120 5000 5000 -4.0 3.0 2.0 0.0 -0.677 0.000 0.677 1.0 2.0 3.0 4.0 After the speed-reading course, the students scored an average of 9 words per minute higher than before they began the speed-reading course. The standard deviation of the difference scores was s 27. To calculate the t statistic, you must first calculate the estimated standard error. The estimated standard error is error for use in calculating the t statistic.) . (Note: For best results, retain at least 4 decimal places from your calculation of the estimated standarod Calculate the t statistic. The t statistic is in the critical region for a one-tailed Use the tool to evaluate the null hypothesis. The t statistic hypothesis test. Therefore, the null hypothesis is that the speed-reading course increases reading speed. . The cognitive psychologist conclude

Explanation / Answer

Solution-

standard error can be calculateed as-

= (standard deviation/n0.5)

= 27/ 121^0.5

= 2.4545

Then t statistic = sample mean / (standard deviation/n0.5)

= 9/2.4545

= 3.6667

Critical t score is given by-

t120,0.01 = 2.3578   ( using t tables )

As t statistic > critical t score, then null hypothesis is rejected at 1% level of significance.

Thanks!

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

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