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STA1510 ASSESSMENT 4 SEM 2 OF 2024 EXPECTED QUESTIONS AND ANSWERS R99,33   Add to cart
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STA1510 ASSESSMENT 4 SEM 2 OF 2024 EXPECTED QUESTIONS AND ANSWERS
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THIS DOCUMENT CONTAINS STA1510 ASSESSMENT 4 SEM 2 OF 2024 EXPECTED QUESTIONS AND ANSWERS. USE IT CORRECTLY TO OBTAIN ABOVE 75%

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  • September 14, 2024
  • 10
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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ABC media company published 4 magazines for the teenage market. The executive editor of the company would like to know whether readership preference for the 4 magazines is independent of
gender. A survey among 190 teenagers was carried out. The following contingency table was obtained.




Which one of the following statements is incorrect?

Select one:
a. The alternative hypothesis, H₁ states that gender and magazine preference are dependent.
b. The degrees of freedom are 3.
c. The null hypothesis states that gender and magazine preference are independent.
d. The expected value for cell youth and girls is 13.60
e. The expected value for cell youth and boys is 13.40

Clear my choice




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, UNISA  2024  STA1510-24-Y  Welcome Message  Assessment 4

QUIZ




Question 2

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A random sample of 8 applicants for a certain foreign job is selected. The number of years that these applicants have studied French in high school
or university, X, and the mark which they obtained in a proficiency test in French, Y, are recorded. The following information is given: ∑X =32, ∑Y =528,
∑XY=2136, ∑X2 =130 and ∑Y2 =34872 Fitting a regression line, which of the following statements is incorrect?


Select one:
a. b₁ = 12

b. Ŷ = 18+12Xi

c. The predicted mark obtained if an applicant studied French for three years is 42.

d. b₀ = 18

e. Mean of X values = 4 Mean of Y values = 66

Clear my choice

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