Reconsider the percentage of titanium in an alloy used in aerospace castings from Exercise 8 39 Recall that s 0 37 and n 51 (a) Test the hypothesis H0 0 25 versus H1 0 25 using a 0 05 State any necessary assumptions about the underlying distribution of the data (b) Explain how you could answer the ...

a In order to use the x statistic in hypothesis testing and confidence interval construction we ne ...

Reconsider the percentage of titanium in an alloy used in aerospace castings from Exercise 8-39. Recall that

Question:

Reconsider the percentage of titanium in an alloy used in aerospace castings from Exercise 8-39. Recall that s = 0.37 and n = 51.
(a) Test the hypothesis H0: σ = 0.25 versus H1: σ = 0.25 using a = 0.05. State any necessary assumptions about the underlying of the data.
(b) Explain how you could answer the question in part (a) by constructing a 95% two-sided confidence interval for σ.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...