MATH 103 Week 9 Assignment | MiraCosta College

Confidence Intervals 

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Please watch the following videos and then answer the questions below.  Attach pics of how you got each solution using both JMP and the graphing calculator.  Do not forget to interpret your results.

Finding Confidence Intervals on the Graphing Calculator

Finding Confidence Intervals using JMP

1.    One difficulty in measuring the nesting success of birds is that the researchers must count the number of eggs in the nest, which is disturbing to the parents. Even though the researcher does not harm the birds, the flight of the bird might alert predators to the presence of a nest. To see if researcher activity might degrade nesting success, the nest survival of 102 nests that had their eggs counted, was recorded. Sixty-four of these nests failed (meaning the parent abandoned the nest.) Assuming that it is reasonable to regard the 102 nests in the sample as representative of the population of nests for which the eggs have been counted, construct and interpret a 95% confidence interval for the proportion of nests that have eggs counted that are then abandoned.

2.    A newspaper recently conducted a survey of a random sample of 120 registered voters in order to predict the winner of a local election. The Republican candidate was preferred by 62 of the respondents. Assuming that it is reasonable to regard the 120 voters in the sample as representative of the population of voters, construct and interpret a 90% confidence interval for the proportion of registered voters who prefer the Republican candidate.

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