5.8 twitter users and news, part i. a poll conducted in 2013 found that 52% of u. s. adult twitter users get at least some news on twitter.12. the standard error for this estimate was 2.4%, and a normal distribution may be used to model the sample proportion. construct a 99% confidence interval for the fraction of u. s. adult twitter users who get some news on twitter, and interpret the confidence interval in context.

We are 99% sure that the true population mean falls in interval .

Step-by-step explanation:

Let be the sample proportion.

As per given , we have

Standard error = 0.024

Critical value for 99% confidence interval :

Confidence interval is given by :-

Then, the 99% confidence interval will be :-

Hence, a 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter :

Interpretation : We are 99% sure that the true population mean falls in interval .

answer for #1 is c

answer for #2 is d

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