Answer:
12
Step-by-step explanation:
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).
To add the two expressions, we can write it as:
4.6x-3 + (-5.3x+9)
We can distribute the plus sign (which means just drop the parenthesis in this case):
4.6x-3-5.3x+9
Now, we can simplify by combining like terms:
-0.7x+6
Answer:
Total number of trees planted = trees
Step-by-step explanation:
Trees planted by each student =
Total number of students =
Using unitary method to find total number of trees planted by all the students in school.
1 student plants = trees
student would plant =
We apply the product rule of exponents to multiply
⇒
⇒
⇒ trees
Total number of trees planted = trees
21x³ - 18x²y + 24xy²
Simplify!
7x³ - 6x²y + 8xy²