My bad i used S instead of A so just switch the letter. hope this helps tho have a nice day
Answer: The 95% confidence interval is approximately (55.57, 58.43)
======================================================
Explanation:
At 95% confidence, the z critical value is about z = 1.960 which you find using a table or a calculator.
The sample size is n = 17
The sample mean is xbar = 57
The population standard deviation is sigma = 3
The lower bound of the confidence interval is
L = xbar - z*sigma/sqrt(n)
L = 57 - 1.960*3/sqrt(17)
L = 55.5738905247863
L = 55.57
The upper bound is
U = xbar + z*sigma/sqrt(n)
U = 57 + 1.960*3/sqrt(17)
U = 58.4261094752137
U = 58.43
Therefore the confidence interval (L, U) turns into (55.57, 58.43) which is approximate.
Answer:
D. For every 7 dogs, there are 3 cats.
Step-by-step explanation:
The answer is C, because there are three triangles, so you multiple 3 time the area which is 8*(4+x)
Answer: 5 * 23 = 115 so 40<
Step-by-step explanation:
