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Q7 Which graph is used to visually represent correlation?

10. For a sample of n = 16, the standard error when σ = 5 is:

Q6 Pearson’s correlation coefficient is used when data are:

9. If weights follow a normal distribution with μ = 65 and variance = 25, the SD =

8. The standard error of the mean decreases when:

Q5 A correlation coefficient r = -0.85 indicates:

7. If population variance is unknown and n ≥ 30, we typically use:

Q4 If r = 0, this indicates:

6. If population variance is unknown and n < 30, we use:

5. If population variance is known, the sampling distribution of X̄ uses:

Q3 If r = +1, the relationship is:

4. A statistic is:

3. A parameter is:

Q2 The value of the correlation coefficient (r) always lies between:

2. A sample is:

1. The population is defined as:

Q1 Correlation is used to measure: