STA301 Solved Quiz 1 by Sahirullah

STA301 - STATISTICS AND PROBABILITY · Solved Quiz No. 01 · Complete Practice Set

Solved by: Sahirullah | info.sahirweb

1. A bell shaped distribution is also known as:

U shaped Skewed Bimodal

Symmetrical

Answer: Bell-shaped curves are characteristic of Normal distributions, which are symmetrical.

Q2. Any population which we want to study is referred as?

Infinite population Final population Standard population

Target population

Answer: The target population is the specific group that the researcher wants to generalize the findings to.

3. A circle in which sectors represents various quantities is called:

Frequency Polygon

Pie Chart

Histogram Component Bar Chart

Answer: Pie charts use segments of a circle to show relative sizes of data.

Q4. If we want to calculate average speed of a car then which average will be used?

Mode

Harmonic mean

Mean Geometric mean

Answer: Harmonic mean is used for rates (like speed or price) involving equal distance or units.

Q5. Which pair of measure cannot be calculated when one of numbers in the series is zero?

H.M. and A.M. G.M. and H.M. G.M. and A.M. None of these

Answer: Geometric mean becomes zero and Harmonic mean becomes undefined if a data point is zero.

6. If you have 28.95 – 29.95 class boundaries then the midpoint will be:

29.45

30. 45
31. 45
32. 45

Answer: Midpoint = (28.95 + 29.95) / 2 = 29.45.

7. From the following table, what is the Upper limit of the 3rd class? (Table:

30.0-32.9, 33.0-35.9, 36.0-38.9...)

35. 9
36. 0
37. 0

38.9

Answer: The third class interval is 36.0 – 38.9; the upper limit is 38.9.

8. A frequency distribution formed considering two variables at a time is called:

Trivariate frequency distribution Univariate frequency distribution Bimodal distribution

Bivariate frequency distribution

Answer: Bivariate analysis involves two different variables.

STA301 Statistics and Probability • Solved by Sahirullah