2020_1 NOUN TMA Questions & Solutions: STT102 - Introductory Statistics

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Jed
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2020_1 NOUN TMA Questions & Solutions: STT102 - Introductory Statistics

Postby Jed » Tue Jul 07, 2020 2:37 am

2020_1 NOUN TMA Questions & Solutions: STT102 - Introductory Statistics




STT102



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STT102

Z=4X−3Y
Z=4X−3Y, find the value of Z corresponding to
X=1,Y=−15
X=1,Y=−15.

49


The probability of sun to rise from the east is

1


Find the product-moment correlation coefficient \(r\) if \(\\sum xy=1600.4,W \\ Wsum xA{2}=582.77,\\ W Wsum yA{2}=4414.14\)
Answer: 0.998


What is the mean of the numbers 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 17; 18; 19; 20?

10


Arrange the numbers 17, 45, 38, 27, 6, 48, 11, 57, 34, and 22 in an array and determine the range
51


In a sample of five measurements, the diameter of a sphere was recorded by a scientist as 6.33, 6.37, 6.36, 6.32, and 6.37 centimeters (cm). Determine unbiased and efficient estimates of the true mean

6.35 cm


A random sample of 50 mathematics grades out of a total of 200 showed a mean of 75 and a standard deviation of 10. What are the 95\\% confidence limits for estimates of the mean of the 200 grades?

\\(75\\pm2.4\\)


8)A sample poll of 100 voters chosen at random from all voters in a given district indicated that 55\\% of them were in favour of a particular candidate. Find the 95\\% confidence limits for the proportion of all the voters in favour of this candidate
\\(0.55\\pm0.10\\)


A dietician believes that an average person with an income below the poverty level gets less than the recommended daily allowance (RDA) of 800mg of calcium. When testing his guess, he obtained the following daily intakes of calcium for a random sample of 10 people with incomes below the poverty level: 686, 994, 740, 648, 1110, 992, 430, 772, 670, 690. Calculate the Test Statistics Z.

-0.52


Which of the following is a discreet variable

Numbers of patients



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Jed
Posts: 1424
Joined: Tue Oct 10, 2017 6:37 pm
Contact:

Re: 2020_1 NOUN TMA Questions & Solutions: STT102 - Introductory Statistics

Postby Jed » Tue Jul 07, 2020 2:38 am

STT102


Email: Solutions2tma@gmail.com
Whatsapp: 08155572788


Given the sets 2, 5, 8,11,14 find the standard deviation
Answer: 20.25

Determine the probability exactly two tails appear in two tosses of a fair coin
Answer: \\(\\frac{1}{4}\\)

Find the area under the standard normal curve that lies the left of 1.32
Answer: 0.9066

A ball is drawn at random from a box containing 5 blue balls, 3 green balls, and 2 black balls. Determine the probability that the ball drawn is black.
Answer: \\(\\frac{1}{5}\\)

Three balls are drawn successively from the box containing 6 red balls, 4 white balls, and 5 blue balls. Find the probability that they are drawn in the order red, white, and blue if each ball is replaced
Answer: \\(\\frac{8}{225}\\)

Final examination in mathematics, the mean was 72 and the standard deviation was 15. Determine the standard score of students receiving the grades 60
Answer: -0.8

The probability of an event not occurring is
Answer: \\(0\\)

Find the area under the standard normal curve to the right of \(-1.28\)
Answer: 0.8997

Consider a hypothesis where \(H_{0}\) where \({\\phi}_{0}\\ =\\ 74\) against \(H_{1}\) where \({\\phi}_{1}\\ WneqW 74\). The test is?
Answer: two tailed

Determine the probability an odd number appearing in single toss of a fair die
Answer: \\(\\frac{1}{2}\\)

Determine the probability an odd number appearing in single toss of a fair die
Answer: \\(\\frac{1}{2}\\)





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