A random sample of n = 920 individuals and Y = 460 yields the confidence interval (0.41423 , 0.48577)for p. Determine the level of confidence (1-a)% of this interval. %3D %3D Suppose nown = prefer large_car. State clearly the two hypotheses, compute the test statistic and conclude. 920, Y = 506)and a = 0.05, test if a majority of Omani %3D

Suppose that for a confidence interval for the difference in two population means: the estimate is 48 the margin of error is 7.84665 and the critical value is 1.645. What is the standard error used to compute this confidence interval? Do not round.

A random sample of size 30 from a normal population yields  = 39  and s = 4.9.  The lower bound of a 95 percent confidence interval is  (Round off upto 2 decimal places).

A scientist claims that only 67% of geese in his area  fly south for the winter. He tags 70 random geese in the summer and finds that 20 of them do not fly south in the winter.  If α= 0.05, is the scientist's belief warranted?  Test by using confidence interval.    Round confidence interval to nearest thousandth.   Show step1-step3 included conclusion.

If n=550 and p' (p-prime) = 0.19, construct a 90% confidence interval.Give your answers to three decimals.