o 8. Given IQ scores are approximately normally distributed with a mean of 100 ando standard deviation of 15, the proportion of people with IQs above 130 is:(a) 95%6 68%(c) 5%(d) 2.5%9. A national random sample of 20 ACT scores from 2010 is listed below. Calculate thesample mean and standard deviation. 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30,30, 18, 14, 12, 26, 17, 18(a) 20.50, 5.79(b) 20.50, 5.9420.85, 5.79(d) 20.85, 5.94 8.10. Provided that the ACT is reasonably normally distributed with a mean of 18 andstandard deviation of 6, deterithe proportion of students with a 33 or higher.(a) 0.0062A 0.0109(c) 0.0124(d) 0.021711. When an investigator uses the data which has already been collected by others, suchdata is called(a) Primary data(b) Collected data(c) Processed data@) Secondary data12. The variance of 15 observations is 4. If each observation is increased by 9, thevariance of the resulting observation is:(b) 3(c) 4(d) 513. Probability that a man will be alive 25 years hence is 0.3 and the probability that hiswife will be alive 25 years hence is 0.4. Find the probability that 25 years hence onlythe man will be alive will be(a) 0.12(b) 0.18(c) 0.28E 0.4214. A box of nine golf gloves contains two left-handed and seven right handed gloves. Ifthree gloves are selected without replacement, what is the probability that all of themare left handed?(a) 1VB) O(c) 7/1849/81Page 3 ofEXAMINER: K. A. ASOSEGA

Answered: 8. Given IQ scores are approximately…

8. Given IQ scores are approximately normally distributed with a mean of 100 and standard deviation of 15, the proportion of people with IQs above 130 is: (a) 95% 6 68% (c) 5% X (d) 2.5%

MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

o 8. Given IQ scores are approximately normally distributed with a mean of 100 and
o standard deviation of 15, the proportion of people with IQs above 130 is:
(a) 95%
6 68%
(c) 5%
(d) 2.5%
9. A national random sample of 20 ACT scores from 2010 is listed below. Calculate the
sample mean and standard deviation. 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30,
30, 18, 14, 12, 26, 17, 18
(a) 20.50, 5.79
(b) 20.50, 5.94
20.85, 5.79
(d) 20.85, 5.94 8.
10. Provided that the ACT is reasonably normally distributed with a mean of 18 and
standard deviation of 6, deteri
the proportion of students with a 33 or higher.
(a) 0.0062
A 0.0109
(c) 0.0124
(d) 0.0217
11. When an investigator uses the data which has already been collected by others, such
data is called
(a) Primary data
(b) Collected data
(c) Processed data
@) Secondary data
12. The variance of 15 observations is 4. If each observation is increased by 9, the
variance of the resulting observation is:
(b) 3
(c) 4
(d) 5
13. Probability that a man will be alive 25 years hence is 0.3 and the probability that his
wife will be alive 25 years hence is 0.4. Find the probability that 25 years hence only
the man will be alive will be
(a) 0.12
(b) 0.18
(c) 0.28
E 0.42
14. A box of nine golf gloves contains two left-handed and seven right handed gloves. If
three gloves are selected without replacement, what is the probability that all of them
are left handed?
(a) 1
VB) O
(c) 7/18
49/81
Page 3 of
EXAMINER: K. A. ASOSEGA

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