b) Two candidates X and Y at the B.A (Hons.) examination obtained the following marks in ten papers: aper 3 6. 8. 9 10 58 49 76 80 47 72 61 59 77 48 39 38 86 72 75 69 57 49 83 66 Which of the candidate showed the more consistent performance? Which of the candidate has greater absolute dispersion?y761 00

A Cohen's d score of 1.2 is considered to be:   Small Negligible Medium Large

Researchers were interested in assessing whether stress levels are different at the beginning of the semester compared to finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week.    Participant Stress 1 Stress 2 1 22 22 2 32 34 3 24 25 4 28 30 5 26 29   Then H0: μ2 - μ1 ≠ 0, true or false?

An instructor for a test preparation course claims that the course will improve the test scores of students. The table shows the critical reading scores for 14 students the first two times they took the test. Before taking the test for the second time, the students took the instructor's course to try to improve their critical reading test scores. At a = 0.01, is there enough evidence to support the instructor's claim? Complete parts (a) through (f). Student Score on first test Score on second test 621 573 577 627 373 369 399 717 488 553 634 478 558 623 10 11 12 13 14 D 618 518 503 604 415 350 439 609 409 481 594 431 527 591 1 2 3 4 6 8 Identify the rejection region(s). Choose the correct answer below. O A. t 2.650 O B. t 3.012 OC. t3.012 (c) Calculate d and sd. d = - 35.786 (Type an integer or a decimal. Round to three decimal places as needed.) Calculate sd- Sa = 133.096 (Type an integer or a decimal. Round to three decimal places as needed.)

Which degrees of freedom should be used for the following? Two-tailed, α = .05, N= 469     450         500         400         475

Need the claim, hypothesis, crit value(s), rejection regions, d, Sd, t test, reject or fail to, and conclusion.

A popular theory is that presidential candidates have an advantage if they are taller than their main opponents. Listed are heights (in centimeters) of randomly selected presidents along with the heights of their main opponents. Complete parts (a) and (b) below. Height (cm) of President 185 170 179 191 194 179 9 Height (cm) of Main Opponent 170 184 174 166 194 182 Identify the test statistic. t= 0.57 (Round to two decimal places as needed.) Identify the P-value P-value = 0.286 (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? Since the P-value is greater than the significance level, fail to reject the null hypothesis. There is not sufficient evidence to support the claim that presidents tend to be taller than their opponents. b. Construct the confidence interval that could be used for the hypothesis test described in part (a). What feature of the confidence interval leads to the same conclusion reached in part (a)? The confidence interval…

Answer.

In testing the hypotheses H​0:p​ = 0.62 vs Ha​: p≠ 0.62, the test statistic is calculated to be z​ = 2.11. Which of the following is the correct​ p-value?   A. 0.0348   B. 0.0174   C. 0.9862   D. 1.9652

I need help with all parts of this question 19