Statistical Analysis MCQs (25)
1) Statistical analysis is mainly used to?
A. Format images
B. Collect and interpret data to find patterns
C. Encrypt files
D. Design websites
2) Mean is also called?
A. Average
B. Middle value
C. Most frequent
D. Spread
3) Median represents?
A. Most frequent value
B. Middle value in sorted data
C. Total sum
D. Largest value
4) Mode is?
A. Middle value
B. Most repeated value
C. Total values
D. Difference between max and min
5) Range is calculated as?
A. Mean – Median
B. Max value – Min value
C. Sum of all values
D. Median – Mode
6) Variance measures?
A. Central value
B. Spread of data from the mean
C. Frequency
D. Time
7) Standard deviation is?
A. Square root of variance
B. Variance of mean
C. Average of variance
D. Mean of median
8) Probability value range is?
A. 0 to 1
B. -1 to 1
C. 0 to 100
D. -∞ to +∞
9) A normal distribution is?
A. U-shaped curve
B. Bell-shaped curve
C. Zig-zag curve
D. Flat line
10) Correlation measures?
A. Data size
B. Relationship between two variables
C. Sum of values
D. Only duplication
11) Correlation coefficient (r) lies between?
A. 0 to 1
B. -1 to 1
C. -100 to 100
D. 1 to 2
12) If r = 0, it means?
A. Perfect positive relation
B. No linear relationship
C. Perfect negative relation
D. Strong relation always
13) Covariance indicates?
A. Direction of relationship
B. Exact probability
C. Median location
D. Data size only
14) Hypothesis testing is used to?
A. Prove something 100%
B. Make decisions using sample data
C. Store data
D. Create charts
15) Null hypothesis is represented as?
A. H1
B. H0
C. P0
D. R0
16) Alternative hypothesis is represented as?
A. H0
B. H1 (or Ha)
C. H2
D. A0
17) p-value is?
A. Probability of sample mean
B. Probability of results assuming H0 is true
C. Total population size
D. Always greater than 1
18) If p-value < 0.05, we usually?
A. Accept H0
B. Reject H0
C. Ignore data
D. Increase sample size always
19) Confidence interval gives?
A. Exact value always
B. Range where true parameter may lie
C. Only mean
D. Only mode
20) Sampling is?
A. Studying entire population always
B. Selecting a subset from population
C. Removing duplicates
D. Cleaning data only
21) Which is a measure of central tendency?
A. Mean
B. Variance
C. Standard deviation
D. Range
22) Which is a measure of dispersion?
A. Mode
B. Median
C. Standard deviation
D. Mean
23) A positive correlation means?
A. Variables move in opposite directions
B. Variables move in same direction
C. No relation
D. Always zero
24) Skewness refers to?
A. Symmetry of distribution
B. Data size
C. Number of duplicates
D. Only mean value
25) Kurtosis describes?
A. Peakness/tailedness of distribution
B. Total sum
C. Column names
D. Missing values
Answer Key
1) B
2) A
3) B
4) B
5) B
6) B
7) A
8) A
9) B
10) B
11) B
12) B
13) A
14) B
15) B
16) B
17) B
18) B
19) B
20) B
21) A
22) C
23) B
24) A
25) A