I need help with c. with correct rounding. please. &9.1.27 Question Help In a po

Question

I need help with c. with correct rounding. please.

&9.1.27 Question Help In a poll, 309 of 1030 randomly selected adults aged 18 or older stated that they believe there is too little spending on national defense. Use this information to complete parts (a) through (e) below. (a) Obtain a point estimate for the proportion of adults aged 18 or older who feel there is too little spending on national defense. p0.3 (Simplify your answer.) (b) Verify that the requirements for constructing a confidence interval about p are satisfied. Are the requirements for constructing a confidence interval about p satisfied? A. Yes, the requirements for constructing a confidence interval are satisfied O B. No, the requirement that the sample be a simple random sample is not satisfied. O C. No, the requirement that np(1-p is greater than 10 is not satisfied D. No, the requirement that the sample size is no more than 5% of the population is not satisfied. (c) Construct a 95% confidence interval for the proportion of adults aged 18 or older who believe there is too little spending on national defense. The 95% confidence interval is ( (Round to three decimal places as needed.)

Explanation / Answer

95% CI =0.272 ; 0.328

( please revert for above answers)_

                                                                                           x                    =   309 sample size n                    = 1030 sample proportion     p? x/n= 0.3000 std error       =Se            =?(p*(1-p)/n) = 0.0143 for 95 % CI value of z= 1.9600 margin of error E=z*std error                            = 0.0280 lower confidence bound=sample proportion-margin of error 0.272 Upper confidence bound=sample proportion+margin of error 0.328

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