The coaches of the East Side Sports Club want to buy lunch for each of the 209 members. What is the total cost of the lunch if t
hey buy The Works (pizza, salad, fruit, and juice) for each member? Show your work and explain how you found your answer.
2 answers:
You might be interested in
Answer:
C) 11
Step-by-step explanation:
1) Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the sample mean for the sample
population mean (variable of interest)
s represent the sample standard deviation
n represent the sample size
Since the Confidence is 0.90 or 90%, the value of and
, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that
The margin of error is given by this formula:
And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from the last equation we got:
And replacing the values that we got we have:
C) 11
Answer:
x > 3
Step-by-step explanation:
The first part is to solve the inequality, which is very easy:
2x - 1 > x + 2, so 2x - x > 2 + 1 so
x > 3
Then we have to graph the solution... that's also easy. It will look like the graph attached, meaning it includes ALL the values X > 3 (that's why the line is dashed on the 3), for ALL the values of Y.
That's a weird graphic, but it does represent the inequality we found.
