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

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

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}\\)

Email: Solutions2tma@gmail.com

Whatsapp: 08155572788

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}\\)

Email: Solutions2tma@gmail.com

Whatsapp: 08155572788

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