MATH 1F92 Lecture 15: Math+1F92-+9.1-+Estimating+a+Population+Proportion+Fill+In
16 Feb 2017
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This (cid:1868) is an example of what"s called a point estimate. Point estimate: the value of a statistic that estimates the value of a parameter. Example 1: at brock university, a simple random sample of 188 people between the ages of 18 to 25 were surveyed to determine if they use instagram. Find the point estimate of the population proportion of people who use instagram. n= 188 x= 188-37. The point estimate 5 for a population proportion is 151/188 or 0. 8031 for student who use instagram. You might conclude that 80% of brock student use instagram. But that"s not an accurate evaluation since its not all brock students. Now in a perfect world, if the simple random sample was done correctly, it should be an accurate representation of the population proportion of brock students who use instagram. However, we know that in general, since we didn"t survey everyone at brock.
