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Q2. A point estimate is:

Q1. Statistical inference is mainly concerned with:

Q15 . If r = -1, then the relationship is:

Q14 The formula of Pearson’s correlation coefficient includes:

20. For the allergy example, the probability p̂ > 0.03 is computed by converting to:

19. If 5% of individuals have an allergy (p = 0.05) and n = 45, this is a problem of:

Q13 Which value shows the strongest relationship?

18. The distribution used for proportions is approximately normal when:

Q12 If r = -0.05, the relationship is best described as:

17. For p = 0.35, n = 100, the standard error =

Q11 If r = 0.25, the relationship is:

16. If population proportion is p = 0.35 and n = 100, the standard error of p̂ is:

15. Sample proportion is denoted by:

Q10 Spearman’s rank correlation is mainly used for:

14. In a bank example: μ = 20, n = 25, σ = 6. Standard error =

13. For a sample of size n = 10 with unknown variance, we use:

12. In the example: n = 40, μ = 4, σ² = 9 → σ = 3. Standard error =

11. If sample mean distribution uses Z, the formula for Z is:

Q9 If the scatter diagram slopes downward from left to right, the correlation is:

Q8 Points closely scattered around a straight line indicate: