The Harvard School of Public Health conducted a survey of 2770 adults in the United States to determine the proportion of Americans who own guns.  According to the results, Injury Preventionin 2007 reported that 26% of adults own at least one gun.  State and estimate the population parameter using both a point estimate and a 99% confidence interval estimate.

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Asked Dec 11, 2019
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The Harvard School of Public Health conducted a survey of 2770 adults in the United States to determine the proportion of Americans who own guns.  According to the results, Injury Preventionin 2007 reported that 26% of adults own at least one gun.  State and estimate the population parameter using both a point estimate and a 99% confidence interval estimate.

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Expert Answer

Step 1

It is given that the sample of adults, n is 2,770, the proportion of Americans who own guns is 26% that is 0.26 and the confidence level is 0.01.

The parameter of point estimate (p) = p-hat = 0.26.

The critical value is obtained below:

Procedure for finding the z-value from two tailed is listed below:

  1. From the table of standard normal distribution, locate the probability value of 0.01.
  2. Move left until the first column is reached. Note ...

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