Here are 2,000 eligible voters in a precinct 500 of the voters are selected at random and asked to indicante
ether they planned to vote for the democratic incumbent or the republican challenger. of the 500 surveyed
0 said they were going to vote for the democratic incumbent. using the 0.99 confidence coefficient, what are
the confidence limits for the proportion that plan to vote for the democratic incumbent?
a 0.422 and 0.538 b. 0.612 and 0.712c.0.397 and 0.797 d. 0.826 and 0.926

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

Ithink your answer is b