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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.
According to the given graph, we can note the following:
The domain would be all the real numbers that
Answer:
Step-by-step explanation:
Let x represent the certain number of of subscriptions in an hour that each of them would sell so that they will end up earning the same amount.
Michelle earns a base wage of $8 per hour, as well as $1 for every subscription that she sells. This means that the total cost of selling x subscriptions in an would be
x + 8
Cody gets $3 per subscription sold, in addition to a base wage of $4 per hour. This means that the total cost of selling x subscriptions in an hour would be
3x + 4
For both of them to earn the same amount,
x + 8 = 3x + 4
3x - x = 8 - 4
2x = 4
x = 4/2 = 2
They would earn the same amount when they sell 2 subscriptions.
The amount that each would earn is
2 + 8 = $10
Answer:
$13.72
Step-by-step explanation:
if a bag of popcorn is represented by b
3b = $5.88
b = $5.88 / 3 = $1.96
7b = $1.96 * 7 = $13.72