STA301 Quiz Statistics [3]

STA301 Quiz Statistics


Question # 1
What does it mean when a data set has a standard deviation equal to zero:
Select correct option:
Mean = median = mode
All of the values in the data are same
The mean of the data is also zero
All values of the data appear with the same frequency


Question # 2
Match the binomial probability P(x< 23) with the correct statement.
Select correct option:
P(there are at most 23 successes)
P (there are fewer than 23 successes)
P (there are more than 23 successes)
P (there are at least 23 successes)


Question # 3
In statistics, the term ‘expected value’ implies the ___ value.
Select correct option:
Independent
Normal
Standard
Mean


Question # 4
A quantity obtained by applying certain rule or formula is known as
Select correct option:
Estimate
Estimator
Parameter
Proportion


Question # 5
Total no. of possible samples of size 2 (without replacement) from the population of size 6, will be:
Select correct option:
20
15
10
18


Question # 6 of 10 ( Start time: 08:50:41 PM ) Total Marks: 1
When a coin is tossed 3 times, the probability of getting 3 or less tails is
Select correct option:
1/2
0
1
3/5
1


Question # 7
Total no. of possible samples of size 3 (with replacement) from the population of size 6, will be:
Select correct option:
256
196
216
325


Question # 8
If c is a constant, then E(c) = ___
Select correct option:
0
1
c
-c


Question # 9 of 10 ( Start time: 08:53:35 PM ) Total Marks: 1
Using the normal approximation to the binomial distribution with n= 3 and p= 0.0571 the value of mean is:
Select correct option:
0.1713
0.2132
0.5133
0.1923

Question # 10
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