Category: Statistics

Categories
Statistics

The probability of drawing any one spade card is: (STA301)

1/52
4/52
13/52
52/52

Categories
Statistics

A random variable X has a probability distribution as follows: X | 0 1 2 3 P(X) | 2k 3k 13k 2k What is the possible value of k: (STA301)

0.01
0.03
0.05
0.07

Categories
Statistics

For the independent events A and B if P (A) = 0.25, P (B) =0.40 then P (A and B) =…… Select correct option: (STA301)

0.65
0.1 
0.50
0.15

Categories
Statistics

If the second moment ratio is less than 3 the distribution will be: (STA301)

Mesokurtic
Leptokurtic
Platykurtic
None of these

Categories
Statistics

If P (A) = 0.3 and P (B) = 0.5, find P (A/B) where ‘A’ and ‘B’ are independent: (STA301)

0.3
0.5
0.8
0.15

Categories
Statistics

Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard deviation of 8. The number of students scoring between 70 and 82 is: (STA301)

272
164
260
328

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Statistics

The moment ratios of normal distribution come out to be: (STA301)

0 and 1
0 and 2
0 and 3 
0 and 4

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Statistics

When we draw the sample with replacement, the probability distribution to be used is: (STA301)

Binomial
Hypergeometric
Binomial & hypergeometric
Poisson

Categories
Statistics

The binomial distribution is negatively skewed when: (STA301)

p>q 
p<q
p=q
p=q=1/2

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Statistics

A random sample of n=25 values gives sample mean 83. Can this sample be regarded as drawn from a normal population with µ= 80 and s= 7? In this question the alternative hypothesis will be (STA301)

H1: µ = 80

H1: µ = 80
H1: µ is not equal to 80
H1: µ > 80
H1: µ <80

H1: µ > 80
H1: µ <80