Questions 51–56 of 56. Imported answers require independent review unless marked reviewed.

Topic practice 56 questionsPage 6 of 6

Question 52

Open question
MANAT2 marksNeeds review
Let

be a random sample from a

population. For testing

against

, the most powerful test rejects

if

, where

is to be chosen such that the level of significance is 0.1. Then the power of this test equals ________.

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Question 53

Open question
MAMCQ2 marksNeeds review
Let


be a random sample from a

population, where

, and let

. Then the maximum likelihood estimator of

is
Your answerChoose one option.

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Question 60

Open question
GAMCQ1 markNeeds review
500 students are taking one or more courses out of Chemistry, Physics, and Mathematics. Registration records indicate course enrolment as follows: Chemistry (329), Physics (186), Mathematics (295), Chemistry and Physics (83), Chemistry and Mathematics (217), and Physics and Mathematics (63). How many students are taking all 3 subjects?
Your answerChoose one option.

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Question 63

Open question
GAMCQ2 marksNeeds review
1200 men and 500 women can build a bridge in 2 weeks. 900 men and 250 women will take 3 weeks to build the same bridge. How many men will be needed to build the bridge in one week?
Your answerChoose one option.

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Question 64

Open question
GAMCQ2 marksNeeds review
The number of 3-digit numbers such that the digit 1 is never to the immediate right of 2 is
Your answerChoose one option.

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Question 65

Open question
GAMCQ2 marksNeeds review
A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region. Contour lines are shown at 25 m intervals in this plot.
Diagram for Mathematics question 65

Which of the following is the steepest path leaving from P?
Your answerChoose one option.

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