Answer:
Step-by-step explanation:
This is a question on hypothesis testing.
Population mean based on 30 year average for July was 90 with
a std deviation of 2.1
Sample of 5 shows average 93.5
To check whether sample average = population average
H0: x bar =90
Ha: x bar not equal 90(Two tailed test)
Test statistic = ![\frac{93.5-90}{\frac{2.1}{\sqrt{5} } }](https://tex.z-dn.net/?f=%5Cfrac%7B93.5-90%7D%7B%5Cfrac%7B2.1%7D%7B%5Csqrt%7B5%7D%20%7D%20%7D)
=3.73
Since this lies outside the range (-1.96, 1.96) we reject null hypothesis
Hence we cannot say sample mean equals 90
Answer:
Lm
Step-by-step explanation:
average = (sum of numbers)/(number of numbers)
Solve the equation for "sum of numbers":
sum of numbers = average * number of numbers
sum of numbers = m * L
sum of numbers = Lm
Answer: B) Lm
![\qquad\qquad\huge\underline{{\sf Answer}}♨](https://tex.z-dn.net/?f=%5Cqquad%5Cqquad%5Chuge%5Cunderline%7B%7B%5Csf%20Answer%7D%7D%E2%99%A8)
Let's simplify ~
![\qquad \sf \dashrightarrow \:( - 2 - 5i) - ( - 4 + 6i)](https://tex.z-dn.net/?f=%5Cqquad%20%5Csf%20%20%5Cdashrightarrow%20%5C%3A%28%20-%202%20-%205i%29%20-%20%28%20-%204%20%2B%206i%29)
![\qquad \sf \dashrightarrow \: - 2 - 5i + 4 - 6i)](https://tex.z-dn.net/?f=%5Cqquad%20%5Csf%20%20%5Cdashrightarrow%20%5C%3A%20-%202%20-%205i%20%2B%20%204%20%20-%20%206i%29)
![\qquad \sf \dashrightarrow \: - 2 + 4 - 5i- 6i)](https://tex.z-dn.net/?f=%5Cqquad%20%5Csf%20%20%5Cdashrightarrow%20%5C%3A%20-%202%20%2B%20%204%20%20%20-%205i-%20%206i%29)
![\qquad \sf \dashrightarrow \:2 - 11i](https://tex.z-dn.net/?f=%5Cqquad%20%5Csf%20%20%5Cdashrightarrow%20%5C%3A2%20-%2011i)
Therefore, A is the Correct choice !
Answer:
multiplying by 1.44 is the same as increasing by 44%
Step-by-step explanation:
this is because 44+100 divided by 100 is 1.44
1 / 343
This is just equal to
1 / 7^3 = 7^-3
A. 7^-1 * 7^-2 = 7^(-1 + -2) = 7^-3
B. 7^7 * 7^-10 = 7^( 7+ -10) = 7^-3
C. 7^-2 * 7^-5 = 7^(-2 + -5) = 7^-7
D. 7^-5 * 7^2 = 7^(-5 + 2) = 7^-3
So the correct answer is letter C. 7^-2 * 7^-5