The Census at Schools program collects data each year from students enrolled in primary and secondary schools in many different countries. In a random sample of 100 students selected from participating schools in Canada, the sample mean arm span of boys is 157.3 cm and the sample standard deviation is 15.43 cm. Find the 95% confidence interval for the population mean span of boys from participating schools in Canada. Use t*

Bis the correct answer

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 : )