Answer:
Step-by-step explanation:
1.
"D. For a random sample of 50 customer wait times, the probability that the sample mean customer wait time will be greater than 25 minutes is approximately 0.10" is correct.
2.
"B. The mean of the sampling distribution of the sample mean is 150 hot dogs" is correct.
(since the mean of all sample means is equal to the population mean which is 150, here).
3.
"B. 2.7−4.2=−1.5" is correct.
(Option D. is incorrect because we want μ(x¯1−x¯2) but not μ(x¯2−x¯1); Option A. is incorrect because 3 and 7 are sample sizes and we are not interested in the difference between sample sizes. Option C. is incorrect because there are no such values as 2.73 and 4.27, here).
4.
"C. No, the conditions for normality have not been met because the sample size for the pennies is not large enough and no information is given about the distributions of the populations" is correct.
(since 25 pennies < 30 is considered small sample and 35 quarters > 30 is considered large sample).
The probability is 0.6875.
We find the probability of 0 heads, 1 heads, and 2 heads:
Answer:
B.
Step-by-step explanation:
is about 8 and it passes the sum test
for a, the sum of 2,15 must be greater than 17 and its equal to so no
X=2y+11 and 4x+3y=11 so choose one of them. I choose x=2y+11 and solve it like this 4(2y+11)+3y=11
8y+44+3y=11
11y=-33
y=-3
Answer:
Yes
Step-by-step explanation:
We know this because the proportion can be used to find another answer.
Example:
How many feet did the elevator ascend in 0.25 minutes?
750 x
---------- = ----------
1 0.25
750(0.25) = 1x
187.5 = x
***Sorry about the format. Hope this helps!