Solution: We are given:
(a) Calculate the z-score for an x of 21.
Answer:
Therefore, the z-score is -0.75
(b) Calculate the z-score for an of 21 from a sample of size 25.
Answer:
Therefore, the z-score is -3.75
(c) Explain how 21 can have such different z-scores.
Answer: x and belong to the same distribution
10. -10 points JKEStat11 7.E.048 Consider a normal population with the following. (Give your answers correct...
Consider a normal population with the following. (Give your answers correct to two decimal places.) μ = 24.5 and σ = 4 (a) Calculate the z-score for an x of 21.5. (b) Calculate the z-score for an x of 21.5 from a sample of size 22. (c) Explain how 21.5 can have such different z-scores. x and x belong to the same distribution x and x belong to different distributions You may need to use the appropriate table in Appendix...
Consider a normal population with the following. (Give your answers correct to two decimal places.) μ = 26 and σ = 4.6 (a) Calculate the z-score for an x of 20.9. (b) Calculate the z-score for an x of 20.9 from a sample of size 26. (c) Explain how 20.9 can have such different z-scores. x and x belong to the same distribution x and x belong to different distributions
5. О-n0 points JKEStat11 E030 Consider a population with the following μ=38 and σ = 5 (a) Calculate the z score for an x of 48.9 from a sample of size 29. (Give your answer correct to two decimal places.) (b) Could this z-score be used in calculating probabilities using Table 3 in Appendix 8? Why or why not?
8.0-9.09 points JKEStat11 8.Ε.094 Assume that z is the test statistic. (Give your answers correct to two decimal places.) (a) Calculate the value of Z for Ho, μ-51, σ 4.3, n-38, x 50.3. (b) Calculate the value of z for Ho: μ = 20, σ = 3.7, n = 78, x = 21.8. (c) Calculate the value of z for Ho: μ 138.5, σ 4.4, n 18, x-: 141.19 (d) Calculate the value of Z for Ho: μ 815, σ...
Consider a normal population with μ = 37 and σ = 4.3. Calculate the z-score for an x of 48.5 from a sample of size 11. (Give your answer correct to two decimal places.) You may need to use the appropriate table in Appendix B to answer this question.
4. 0-9.09 points JKEStat11 8.E.025 The sampled population is normally distributed, with the given information. (Give your answers correct to two decimal places.) n 19, x 29.6, and ơ 6.8 (a) Find the 0.95 confidence interval for μ. (b) Are the assumptions satisfied? Explain. to O Yes, the sampled population is normally distributed. O No, the sample distribution is not normally distributed. O not enough information You may need to use the appropriate table in Appendix B to answer this...
9. -10 points JKEStat11 7.E.047 | A population has a standard deviation σ of 18.6 units. (Give your answers correct to two decimal places.) (a) What is the standard error of the mean if samples of size 12 are selected? (b) What is the standard error of the mean if samples of size 22 are selected? (c) What is the standard error of the mean if samples of size 50 are selected? (d) What is the standard error of the...
3. -10 points JKEStat11 7 E.020 A population has a standard deviation σ of 27 units. (Give your answers correct to two decimal places.) (a) Find the standard error for the mean if n28. (b) Find the standard error for the mean if n = 41. (c) Find the standard error for the mean if n74. You may need to use the appropriate table in Appendix B to answer this question. Need Help? Read It Talk to aTutor
onsider a population with the following. μ = 46 and σ = 5.8 (a) Calculate the z-score for an x of 47.1 from a sample of size 41. (Give your answer correct to two decimal places.) (b) Could this z-score be used in calculating probabilities using Table 3 in Appendix B? Why or why not? You may need to use the appropriate table in Appendix B to answer this question.
Assume that z is the test statistic. (Give your answers correct to two decimal places.) (a) Calculate the value of z for Ho: μ = 10, σ = 3.3, n = 37, x = 11.1. (b) Calculate the value of z for Ho: μ = 120, σ = 22, n = 25, x = 127. (c) Calculate the value of z for Ho: μ = 18.2, σ = 4.3, n = 145, x = 19.05. (d) Calculate the value of...