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STA301 Statistics and Probability Online Quiz No 02 Solution and Discussion Fall 2015

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# STA301 QUIZZES NO 2 14 DEC 2015

Question # 3 of 10 ( Start time: 01:45:35 PM ) Total Marks: 1
In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women?
Select correct option:
450
780
5040
11760
Question # 4 of 10 ( Start time: 01:47:16 PM ) Total Marks: 1
Relative dispersion is expressed in terms of:
Select correct option:
Subtraction
Ratio
All of these

Question # 5 of 10 ( Start time: 01:49:04 PM ) Total Marks: 1
A fair coin is tossed three times. What is the probability that at least one head appears?
Select correct option:
1/8
7/8
4/8
6/8
Question # 6 of 10 ( Start time: 01:50:33 PM ) Total Marks: 1
The number of ways in which four books can be arranged on a shelf are:
Select correct option:
4
6
12
24

Question # 7 of 10 ( Start time: 01:52:08 PM ) Total Marks: 1
Which of the rule is applied to the frequency distribution that is mound-shaped and symmetric?
Select correct option:
Chebychev’s rule
Empirical rule
Combination rule
Combination rule

Question # 8 of 10 ( Start time: 01:53:29 PM ) Total Marks: 1
If a distribution has negative skewness, in what order (lowest to highest) will the averages be?
Select correct option:
mean, mode, median
mean, median, mode
mode, median, mean
median, mode, mean

Question # 9 of 10 ( Start time: 01:55:04 PM ) Total Marks: 1
If P(A or B) = P(A)+P(B), then A and B are:
Select correct option:
Mutually exclusive events
Independent events
Exhaustive events
Equally likely events

Question # 10 of 10 ( Start time: 01:55:55 PM ) Total Marks: 1
If in a simple linear regression model it is assumed that the intercept parameter is equal to 0:
Select correct option:
The regression line will pass through the origin
The regression line will pass through the point (0,10)
The regression line will pass through the point (0,-10)
The slope of the line will also be equal to 0

• If A = {10, 11} then which of the following is power set of A

P(a)={},{10},{11},{10,11}

• For a symmetrical distribution, b1 is always

symmetrical distributions, b1 is equal to zero

• Dividing interquartile range by 2 we get

semi-interquartile range

• If a fair coin is tossed 2 times then probability that two heads appear is equal to

1/2

• Which of the rule is applied to the frequency distribution that is mound-shaped and symmetric

Chebychev’s Rule

• For a Normal distribution, b2 (moment ratio) will be

normal distribution, b2 = 3

• If A = {1,2,3,4 } and B = {3,4,5,6} then A union B will be

AuB={1,2,3,4,5,6}

• In a box and whisker plot, variable of interest is plotted on

horizontal axis

• If A = {H, T} then which of the following is power set of A
• A graph of plotted points which shows the relationship between two sets of data is known as
• Mean deviation is a measure of dispersion in which deviations are taken around the
• 5  C 5 equals to
• Moment ratio b1 is used to measure
• Which of the following is NOT a possible probability
• If a distribution has negative skewness, in what order (lowest to highest) will the averages be
• In a five number summary, which of the following is not used for data summarization

latest quiz solved on 16/12/2015

1. In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?

Select correct option:

970

50400

640

720

1. In a coin tossing example, we have only two possible outcomes, a head or a tail; this is an example of :

Select correct option:

Equally likely events

Mutually exclusive events

Both of these

None of these

1. For two mutually exclusive events A and B, P (A) = 0.2 and P (B) = 0.4, then P(AUB) is:

Select correct option:

0.8

0.2

0.6

0.5

1. Variance is expressed in ...... units as the units of data set.

Select correct option:

Squared

Cube

Single

Same

1. Adding all the squared deviations taken from mean and dividing by the number of observations, we get:

Select correct option:

Standard Deviation

Variance

Mean Deviation

None of the above

1. A set which is the sub-set of every set is

Select correct option:

Empty Set

Power Set

Universal Set

Super Set

1. Absolute dispersion measures spread in terms of:

Select correct option:

Same units

Different units

Free of units

Independent of units

1. Formula for Co - efficient of Quartile Deviation is:

Select correct option:

Q2−Q1/Q1−Q2

Q3−Q1/Q3+Q1

Q3+Q1/Q3−Q1

Q3−Q1/Q2+Q1

1. If a box contains two red and three yellow balloons then probability of yellow balloons will be equal to:

Select correct option:

2/5

1/5

3/5

4/5

10. When the union of mutually exclusive events is equal to entire sample space, it is called:

Select correct option:

Exhaustive events

Mutually exclusive events

Equally likely events

Random events

11. 5C5 equals to:

Select correct option:

5

1

10

25

12. Quartile deviation is superior to range as it is not affected by extremely:

Select correct option:

Large values

Small values

Both Large and small values

None of these

13. If a box contains six red, three blue and five pink ties then probability of blue ties will be equal to:

Select correct option:

1/14

3/14

5/14

6/14

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