Answer:
-0.5
Step-by-step explanation:
Answer:
37.8÷7.6=4.974
It would be 4 complete cotton swabs High.
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.
X=8.5
190-5=185
185/-5=-37
-37-3=-34
34/4=8.5
Answer:
Step-by-step explanation:
Let c be the number.
We are asked to write an expression for given verbal description.
7 times the number c would be .
Two less than seven times a number means 2 subtracted from .
Two less than seven times a number c would be .
Therefore, our required expression would be .