Exhibit 4A The estimate of the student body of a local university based on the l

Question

Exhibit 4A The estimate of the student body of a local university based on the last school year are: 30% freshmen, 26% sophomores, 24% juniors, and 20% seniors. A sample of 250 students taken from this year's student body showed the following number of students in each classification. Freshmen Sophomores Juniors Seniors I 70 65 60 55 Actual counts Question 15 Expected number according to the estimations We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this year school. Refer to Exhibit 4A, the expected number ei of freshmen is O a. 50 O b, 60 d, 75

Explanation / Answer

16)option A

17)option B

18)option A

observed Expected Chi square type Probability O E=total*p =(O-E)^2/E freshmen 0.3000 70.000 75.00 0.33 Sophomores 0.2600 65.000 65.00 0.00 Juniors 0.2400 60.000 60.00 0.00 Seniors 0.2000 55.000 50.00 0.50 1 250 250 0.8333

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

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