Answer:
48
Step-by-step explanation:
12/20 = x/80
20x = 960
x = 48
Answer:
A manager of a grocery store wants to determine if consumers are spending more than the national average.
Yes is the answer
Step-by-step explanation:
Given that the national average is $150.00 with a standard deviation of $30.20.
Sample size n =40
H0: x bar = mu
Ha: x bar >mu
(one tailed test for a single mean)
Sample average x bar = 160
Mean difference = 160-150 =10
std error = 30.20/sqrt 40
=4.775
Test statistic = 2.094
Z critical for 2.5% = 1.96 (one tailed)
Since test statistic > z critical we reject null hypothesis.
Hence Manager's contention is right.
Answer:
Step-by-step explanation:
i hope this helps
Answer:
1. 5√32)^3
2^3=6
2. 5^2(1.5)
5^3=125
3. (0.00001)^2
0.00001×0.00001=0.0000000001
4. 3√343)^2
7^2=49
5. 3√216)^4
6^4=1296
6.19^0=1