STA301 Quiz No.2 Shared by Hina Shahid

Question # 1 of 10 ( Start time: 07:03:59 PM )          Total Marks: 1
If a random variable X denotes the number of heads when we toss a fair coin 5 times, the X assumed the values:
Select correct option:
0,1,2,3
1, 2,3,4,5
0, 1, 2,3,4,5
1, 5, 5

Question # 2 of 10 ( Start time: 07:04:50 PM )          Total Marks: 1
Which of the following is most important and most widely used method in point estimation?
Select correct option:
The method of moments
The method of fractional moments
The method of least square
The method of maximum likelihood
The method of maximum likelihood is regarded as the MOST important method of estimation, and is the most widely used method. This method was introduced in 1922 by Sir Ronald A. Fisher (1890-1962).The mathematical technique of finding Maximum Likelihood Estimators is a bit advanced, and involves the concept of the Likelihood Function.

Question # 3 of 10 ( Start time: 07:05:41 PM )          Total Marks: 1
F-distribution is skewed to the
Select correct option:
Right
Left
Right and Left
None of these

Question # 4 of 10 ( Start time: 07:06:49 PM )          Total Marks: 1
As sample size goes up, what tends to happen to 95% confidence intervals?
Select correct option:
They become wider
They become more precise
They become more narrow
They become more precise and narrow

Question # 5 of 10 ( Start time: 07:08:10 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
Sample variance
Reciprocal of the sample variance

Question # 6 of 10 ( Start time: 07:09:29 PM )          Total Marks: 1
In general, the estimators obtained by the method of moments are ………….
Select correct option:
Biased
Inconsistent
Inefficient
All the above

Question # 7 of 10 ( Start time: 07:10:49 PM )          Total Marks: 1
When we draw the sample with replacement, the probability distribution to be used is:
Select correct option:
Binomial
Hypergeometric
Binomial & hypergeometric
Poisson

Question # 8 of 10 ( Start time: 07:11:28 PM )          Total Marks: 1
ANOVA stands for
Select correct option:
Analysis of variance
Analysis of covariance
Analysis of variables
All above

Question # 9 of 10 ( Start time: 07:12:00 PM )          Total Marks: 1
Suppose 60% of a herd of cattle is infected with a particular disease. Let Y = the number of non-diseased cattle in a sample of size 5. The distribution of Y is:
Select correct option:
Binomial with n = 5 and p = 0.6
Binomial with n = 5 and p = 0.4
Binomial with n = 5 and p = 0.5
Poisson with u = .6

Question # 10 of 10 (Start time: 07:13:04 PM)          Total Marks: 1
The value of chi square can never be:
Select correct option:
Zero
Less than 1
Greater than 1
Negative