بايو بايت - BioByte

Q57. Which confidence interval is the widest?

Q56. If population variance is known, use:

Q55. In hypothesis testing, failing to reject Ho means:

Q54. The margin of error depends on all EXCEPT:

Q53. Given Zobs = −2.5 and α = 0.01 (two-tailed), the decision is:

Q52. A left-tailed test rejects Ho when:

Q51. If n is large, the sampling distribution of the proportion is approximately:

Q50. Which value increases the width of a confidence interval?

Q49. If α decreases from 0.05 to 0.01, the rejection region becomes:

Q48. In a two-proportion test, the pooled proportion is calculated as:

Q47. Sample proportions are p₁ = 0.60 and p₂ = 0.50. The difference is:

Q46. If the confidence interval for (μ₁ − μ₂) includes zero, then:

Q45. Two independent samples have equal known variances. Which test is most appropriate?

Q44. A 90% confidence interval uses which critical Z-value?

Q43. If Zobs = 2.1 and Zcritical = 1.96, then:

Q42. For α = 0.01 in a right-tailed Z-test, the critical value is approximately:

Q41. A sample of 800 people includes 296 smokers. Test Ho: P = 0.35 vs H₁: P ≠ 0.35 at α = 0.05. What is the correct decision?

Q40. A 99% confidence interval corresponds approximately to which Z-value?

Q39. The pooled proportion is used when:

Q38. For testing the difference between two proportions, the test statistic follows approximately: