Answer:
2.5+2.0+4.0+3.0 =11.5 if I'm not mistaken
To find the price per shirt, simply divide the total (combined) cost of the shirts by the amount of shirts
A.) $26.96 (cost of 6 shirts) ÷ 6 (shirts) = $4.49 per shirt
B.) $21.00 (cost of 5 shirts) ÷ (5 shirts) = $4.20 per shirt
C.) $28.50 (cost of 7 shirts) ÷ (7 shirts) = $4.07 per shirt
Comparing A, B, and C, the best buy would be C ($28.50 for 7 shirts)
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.
Equation: 6 * 1/4 - 20 - 32u
Work:
6/4 - 20 - 32u
3/2 - 20 - 32u
-32u + (3/2 - 20)
-32u - 37/2
Final Answer:
-32u - 37/2 or -32u - 18 1/2
