MTH302 Quiz 4

Q1. What do you mean of Measure of dispersion?

1. b)Distances of mean from the values
2. a)Distances of every two distinct values
3. d)None of these
4. c)Both
5. & (b)

Q2. There are two graphs G1 and G2. The graph G1 has r = 0.9 and the graph G2 has r = 0.5, then what result do you take out from it?

1. G1 is more scattered than G2.
2. G1 and G2 are equally scattered.
3. No result can be drawn from the given data.
4. G1 is less scattered than G2.

Correct answer: G1 is less scattered than G2.

Q3. Which method of trend analysis is useful for data not having a pronounced trend or seasonality?

1. Exponential smoothing method
2. Trend analysis
3. Multiplicative model
4. Decomposition model

Correct answer: Exponential smoothing method

Q4. The arithmetic mean of the absolute deviation of the observation from the mean is called

1. Standard Error
2. Mean deviation
3. Variance
4. Absolute Deviation

Correct answer: Mean deviation

Q5. The sample variance is divided by.

1. n
2. N
3. n-1
4. N-1

Correct answer: n-1

Q6. The slope of the regression line may be

1. All of these
2. Negative
3. Positive
4. Zero

Correct answer: All of these

Q7. The estimated regression line of Y on X is

1. Y` = a - bX
2. X` = a + bY
3. iv. None of above
4. Y` = a + bX

Correct answer: Y` = a + bX

Q8. If the regression line is Y = 8 – 5X, then “8” is the ………. and “-5” is the …………… of the regression line.

1. Slope, intercept
2. Slope, regression coefficient
3. Radius, intercept
4. Intercept, slope

Correct answer: Intercept, slope

Q9. If the correlation coefficient is -0.75, what does this indicate about the relationship between two variables?

1. Strong positive correlation
2. Strong negative correlation
3. Weak positive correlation
4. Weak negative correlation

Correct answer: Strong negative correlation

Q10. Which is the proportion of total variation explained by the regression line?

1. Mean square error
2. Simple coefficient of determination
3. Standard error of the regression coefficient
4. Slope of the regression line

Correct answer: Simple coefficient of determination