STA301 Quiz

For any two estimators T1 and T2, if VAR(T1) < VAR(T2), then T1 is: Consistent

Unbaised · Sufficient · Efficient

In a set of 10 values all the values are 5, what will be the P50?

What is the graphical shape of the chi-square distribution? Positively skewed

Uniformly distributed

Norrmally distributed

Which of the following is a characteristic of the normal distribution: It is a skewed distribution

It is bell-shaped · It is not asymptotic · It is leptokurtic · Please choose one

A five number summery consist of :

1. 0 1 3 , , , , ( 97) m X Q Median Q andX Page
2. 1 3 0 , , , , m X Q Mean Q and X
3. 1 3 0 , , , , m X Q Mode Q and X
4. 0 1 2 , , , , m X Q Median Q andX

Please choose one

in a multiplication theorem P(A∩B) equals:

1. P(A) P(B)
2. P(A) + P(B)
3. P(A) * P(B|A) (Page 159)
4. P(B\A) * P(B)

The probability of drawing ‘White’ ball from a bag containing 4 red , 8 black and 3 white ball is

1. 0
2. 3/15
3. 1/12
4. 1/2

If A and B are mutually exclusive events then P(A or B) equals:

1. P(A) + P(B) - P(A and B)

Solved Quiz

Lec. 1 to 22

STA301

1. P(A) * P(B)
2. P(A) + P(B) (Page 155)
3. P(A|B) + P(B|A)
4. Prior probability
5. Subjective probability not confirmed
6. Conditional probability
7. Joint probability

First moment about origin is always equals to:

1. Mean (Page 119)
2. Variance
3. Standard Deviation
4. Zero

Which one of the following measurement does not divide a set of observations into equal parts?

1. Quartiles
2. Deciles
3. Percentiles
4. Standard deviations

if first and third quartile are 21.16 and 56.36 respectively, then the quartile deviation is:

1. 17.1 (Page 84)
2. 34.2
3. 51.3
4. 50.5

The height of student is 60 inch. This is an example of……?

1. Continues data
2. Qualitative data
3. Categorical data
4. Discrete data

Which of the statement is true regarding a sample?

1. It is a part of population (Page 13)
2. It must contain at least five observations
3. It refers to descriptive statistics
4. It produces true value

Which one of the following graphs is used for a time series data?

1. Histogram
2. Historigram
3. Frequency curve
4. Frequency polygon

Which of the following comes first to make frequency distribution

1. No. of groups
2. Class intervals
3. Rang (Page 28)
4. Tally marks

The average which is defines as reciprocal of arithmetic mean of the reciprocals of the values is called

1. Geometric Mean
2. Harmonic mean (Page 77)
3. Mode
4. Median

If a car is running at the rate of 15km/hr during first 30km, at 20km/hr during the second 30, which type of average will be used to find the average speed/hr:

1. Weighted mean (Not sure)
2. Harmonic mean
3. Arithmetic mean
4. Geometric mean

The probability of drawing a ‘jack card ‘from 52 playing cards is:

1. 1/52
2. 4/52
3. 13/52
4. 26/52

If all the values fall on the same straight line and the line has a positive slope then what will be the value of the correlation coefficient ‘r’:

1. 0 ≤ r ≤ 1
2. r ≥ 0
3. r = +1
4. r=-1

If a curve has a longer tail to the right, it is called:

1. Positively skewed (Page 39)
2. Negatively skewed
3. J-shaped
4. Symmetric

Which one of the following is not included in measures of central tendency?

1. Quartile deviation (Page 82)
2. Harmonic mean
3. Geometric mean
4. Arithmetic mean

Which of the following is not based on all the observations?

1. Arithmetic Mean
2. Geometric Mean
3. Harmonic mean
4. Mode

What is the Standard Deviation of 7, 7, 7, 7, 7, 7, 7

1. 49
2. 1
3. 0 (Standard deviation will always be zero if all the values in data are same)