Answer:
E. The sample size is the same for X and Y, and the confidence level used for the interval constructed from X is greater than the confidence level used for the interval constructed from Y
Step-by-step explanation:
Confidence interval formula is given as
CI = \bar{x} \pm z*(\sigma/\sqrt{n})
Here, we can see that the width of confidence interval is z*(\sigma/\sqrt{n}) , which is dependent only on z critical value, standard deviation (sigma) and sample size (n)
This simply entails that either z or n or both are greater for x as compared to y.
Option E is correct answer because x and y can have sample sizes, but if the z critical is greater for x, then the width will be larger.
Answer:
4¹⁸
Step-by-step explanation:
(4⁻³)⁻⁶
= 4⁽⁻³⁾⁽⁻⁶⁾
= 4¹⁸
800*.035 = 28 This is interest per year.
28 * 7 = $196 Total interest earned for seven years
Total money in account is $996
Well, first we have to figure out how many tickets are already sold. To do this you have to first make 1/5 and 2/3 have the same denominator. You can do this by multiplying 1/5 by 3 to get 3/15, and 2/3 by 5 to get 10/15. 3/15+10/15=13/15, so 2/15 of the tickets are 300 tickets, so 1/15 of the tickets is 150 tickets. 150*15 is 2250 so there are a total of 2,250 tickets for the match.
Hope this helps!