Honors Advanced Algebra Presentation 1-7.  The mean of the quiz grades was 33.77, and the standard deviation was 4.11.  The mean of Algebra grades is.

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Honors Advanced Algebra Presentation 1-7

 The mean of the quiz grades was 33.77, and the standard deviation was  The mean of Algebra grades is currently 86.85, and the standard deviation is 8.69.

 The margin of error of a random sample defines an interval, centered on the sample percent, in which the population percent is most likely to lie.

 After a 1000 person poll, a polling organization reports that 58% of citizens plan to vote for candidate A with a margin of error of ± 3%.  What is the range of possible vote percentages for candidate A?  Does this leave any doubt as to who will win the election?

 Students at a high school will vote on a proposal to start classes later. According to a sample survey, 54% of the students agree and 46% disagree with the proposal. The margin of error is ±5%.  What is the range of possible percents of agreement?  Can we say with certainty that the proposal will pass?

 Pg 49-50, #6-7, 20-22