STA301 Midterm MCQs by Team Aiza

Q1. Given the least squares regression line Y^= 5-2x:

1. as x decreases, so does y
2. None of the above
3. the relationship between x and y is positive
4. the relationship between x and y is negative

Correct answer: the relationship between x and y is negative

Q2. For a symmetrical data set mean value is 150 and standard deviation 25. 99.73 %( approximately all) values will lie between

1. (125,175)
2. (100,200)
3. (125,180)
4. (75,225)

Correct answer: (75,225)

Q3. Which of the following method of skewness based on quartiles?

1. Pearson
2. Bowleys
3. Fisher
4. Sheppred

Correct answer: Bowleys

Q4. In a linear regression, best fitted line is obtained through:

1. Method of semi average
2. Method of least square
3. Method of moment
4. Method of likelihood

Correct answer: Method of least square

Q5. In a linear regression, Y=a+bX, the variable “Y” will always:

1. Quantitative variable
2. A random variable
3. Qualitative variable
4. A non-random variable

Correct answer: A random variable

Q6. Positive square root of variance is known as:

1. Mean deviation
2. Range
3. All above
4. Standard Devation

Correct answer: Standard Devation

Q7. In a Box and Whisker plot, right end of the box is referred to as:

1. First quartile
2. Third quartile
3. Second quartile
4. Mode

Correct answer: Third quartile

Q8. Moment ratio b2 is used to measure:

1. Skewness
2. Mean
3. Kurtosis
4. Symmetry

Correct answer: Kurtosis

Q9. When two dice are rolled the number of possible sample points are:

1. 36
2. 24
3. 6
4. 12

Correct answer: 36

Q10. The value of 10C9:

1. 35
2. 45C. 10
3. 35

Q1. Mean deviation is a measure of dispersion in which deviations are taken around the:

1. None of the above
2. Third Quartile
3. Mean
4. First Quartile

Correct answer: Mean

Q2. An event that contains only one sample points is called:

1. Simple event
2. Normal event
3. Mutually exclusive event
4. Compound event

Correct answer: Simple event

Q3. For which of the following measures, we take deviations around mean in square form?

1. Standard deviation
2. None of these
3. Mean deviation
4. Mean deviation and Standard deviation

Correct answer: Standard deviation

Q4. If Mean = 25& S.D is 5 then C.V is:

1. 10%
2. 25%
3. 100%
4. 20%

Correct answer: 20%

Q5. If Y=3X+5,then S.D of Y is equal to

1. s.d(x)+5
2. 3s.d(x)+5
3. 3 s.d(x)D. 9 s.d(x)

Q6. A set that contains all possible outcomes of a system is known as:

1. Infinite Set
2. Universal Set
3. Finite Set
4. None of these

Correct answer: Universal Set