STA1610 ASSIGNMENT 4 2024

Assessment 4: Attempt review 30/07/2024, 23:14




STA1610-24-Y ! Welcome Message ! Assessment 4

QUIZ




Started on Tuesday, 30 July 2024, 10:31 PM
State Finished
Completed on Tuesday, 30 July 2024, 11:13 PM
Time taken 42 mins 4 secs
Marks 18.50/20.00
Grade 92.50 out of 100.00


Question 1 Consider the (1 − 𝛼)% conPdence interval (CI) estimates of the population mean
Complete provided in the list of options below. The CI estimates are based on the same 𝛼 and 𝜎
Mark 2.00 out of but different 𝑛𝑖 's where 𝑛1 < 𝑛2 < 𝑛3 < 𝑛4 < 𝑛5 . Which one of the following CI
2.00 estimates is computed based on 𝑛3 ?


a. (40.22; 59.78)
b. (43.09; 56.91)
c. (45.11; 54.89)
d. (46.54; 53.46)
e. (47.56; 52.44)



Question 2 A simple random sample of 16 from a population with a standard deviation of 120
Complete results in sample mean of 600. Construct a 90% conPdence interval estimate of the
Mark 2.00 out of population mean and choose the correct answer from the list of option below.
2.00

a. (550.65; 649.35)
b. (541.20; 658.80)
c. (522.72; 677.28)
d. (547.41; 652.59)
e. (536.07; 663.93)




https://mymodules.dtls.unisa.ac.za/mod/quiz/review.php?attempt=20450634&cmid=855715 Page 1 of 5