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STA301
For a non-symmetric (Skewed) distributions median is ………… than/to mean
Select correct option:
Equal
Greater
Less
Greater or less (Not equal)
Fourth moment about mean provides information about the_________ of the distribution.
Select correct option:
Centre
Dispersion
Symmetry
Kurtosis
The occurrence of a 6 when a die is thrown is an example of:
Select correct option:
Mutually exclusive event
Random event
Simple event
Compound event
If P (E) is the probability that an event will occur, which of the following must be false:
Select correct option:
P(E)= - 1
P(E)=1
P(E)=1/2
P(E)=1/3
In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?
Select correct option:
720
950
1560
2450
In how many ways can the letters of the word 'LEADER' be arranged?
Select correct option:
360
140
72
5040
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
According to Empirical rule, approximately 68% of the measurements will fall within:
Select correct option:
(Mean-S.D, Mean+S.D)
(Mean-2S.D, Mean+2S.D)
(Mean-3S.D, Mean+3S.D)
None of these
If A = {1,2,3,4 } and B = {3,4,5,6} then A - B will be:
Select correct option:
{1,2}
{3,4}
{3,2,1}
{1,2,3,4,5,6}
For two mutually exclusive events A and B, P (A) = 0.1 and P (B) = 0.4, then P(AUB) is:
Select correct option:
0.1
0.3
0.4
0.5
Quiz No 2 STA (301)
For a positively skewed distribution mid range is ……………. To/than the mid quartile range
Greater
Less
Equal
None of the above
Difference between the largest and the smallest data values is called:
Variance
interquartile range
range
coefficient of variation
In a Box and Whisker plot, left end of the box is referred to as:
First quartile
Second quartile
Median
Mode
In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?
720
950
1560
2450
If Xm is maximum and Xo is minimum value in a data set then formula for co-efficient of dipersion is as:
(Xm-Xo)/(Xo-Xm)
(Xm-Xo)/(Xo+Xm)
(Xo+Xm)/(Xo-Xm)
(Xm+Xo)/(Xm-Xo)
If a fair coin is tossed 2 times then probability that two heads appear is equal to:
½
1/3
¼
1/5
Find the number of subsets of the following set. {x | x is a day of the week}
14
49
7
128
Today Solved Quiz
Question # 1 of 10 (Start time: 06:44:02 PM) Total Marks: 1
In the method of moments, how many equations are required for finding two unknown population parameters?
Select correct option:
1
2 = answer
3
4
Question # 2 of 10 (Start time: 06:45:31 PM) Total Marks: 1
For statistical inference about the mean of a single population when the population standard deviation is unknown, the degrees for freedom for the t distribution equal n-1 because we lose one degree of freedom by using the:
Select correct option:
Sample mean as an estimate of the population mean = answer
Sample size as an estimate of the population size
Sample proportion as an estimate of the population proportion
Sample standard deviation as an estimate of the population standard deviation
Question # 3 of 10 ( Start time: 06:47:31 PM ) Total Marks: 1
An urn contains 4 red balls and 6 green balls. A sample of 4 balls is selected from the urn without replacement. It is the example of:
Select correct option:
Binomial distribution
Hypergeometric distribution = answer
Poisson distribution
Exponential distribution
Question # 4 of 10 ( Start time: 06:48:17 PM ) Total Marks: 1
An estimator is always a:
Select correct option:
Statistic = answer
Random variable
Statistic and Random variable
Parameter
Question # 5 of 10 ( Start time: 06:49:50 PM ) Total Marks: 1
The Chi- Square distribution is continuous distribution ranging from:
Select correct option:
Zero to infinity = answer
Minus infinity to plus infinity
Minus infinity to one
One to plus infinity
Question # 6 of 10 ( Start time: 06:51:10 PM ) Total Marks: 1
In a Geometric distribution, Maximum Likelihood Estimator (MLE) for proportion (P) is equal to:
Select correct option:
Sample mean
Reciprocal of the mean = answer
Sample variance
Reciprocal of the sample variance
Question # 7 of 10 ( Start time: 06:52:45 PM ) Total Marks: 1
Let X be a random variable with binomial distribution, that is (x=0,1,…, n). The Var[X] is:
Select correct option:
P
NP
NP (1-p) = answer
Xnp
Question # 8 of 10 ( Start time: 06:54:23 PM ) Total Marks: 1
ANOVA stands for
Select correct option:
Analysis of variance = answer
Analysis of covariance
Analysis of variables
All above
Question # 9 of 10 ( Start time: 06:55:37 PM ) Total Marks: 1
If an estimator is more efficient then the other estimator, its shape of the sampling distribution will be
Select correct option:
Flattered
Normal
Highly peaked = answer
Skewed to right
Question # 10 of 10 ( Start time: 06:56:34 PM ) Total Marks: 1
How can we interpret the 90% confidence interval for the mean of the normal population?
Select correct option:
There are 10% chances of falling true value of the parameter
There are 90% chances of falling true value of the parameter = answer
There are 100% chances of falling true value of the parameter
All are correct
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