Construct a 95% confidence interval for the population proportion that claim to always buckle up. (1) State the confidence interval. (Round your answers to four decimal places.) (ii) Sketch the graph. a C.L. = 2 2 P' (ii) Calculate the error bound. (Round your answer to four decimal places.)

Complete parts a through d

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Solve Part a Suppose X is a normally distributed variable with a mean of 10 and a deviation of 2. Please give a numerical solution for part (a) a. Find p(X<0)

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Find the left and right chi square values, then give the confidence interval. Sample Variance s 15.99 %3D Confidence Level c = 0.90 and Sample Size n = 13 and x %3D %3D At the 90 % level of confidence the population variance is between and (Round all answers to 3 decimal places)

nework: Chap A random sample of 25 items is drawn from a population whose standard deviation is unknown. The sample mean is x = 850 and the sample standard deviation is s= 15. Use Appendix D to find the values of Student's t. (a) Construct an interval estimate of u with 95% confidence. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (b) Construct an interval estimate of u with 95% confidence, assuming that s 30. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (c) Construct an interval estimate of u with 95% confidence, assuming that s = 60. (Round your answers to 3 decimal places.) The 95% confidence interval is from to (d) Describe how the confidence interval changes as s increases. The interval stays the same as s increases. The interval gets wider as s increases. O The interval gets narrower as s increases.

100) The absolute value the calculated t value for a paired t-test. The critical value you would use if doing a two-tailed test.   The critical value you would use if doing a one-tailed test.  The result of a two-tailed test.  The result of a one-tailed test.