please faster
integers
class 7
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Answer: I think it is 336x but tries it
a. Z-test of a population mean
b. Z-test of a population proportion
c. t-test of population mean
d. t-test of a population proportion
The Z-test of a population mean is used here because it is given that the population standard deviation is $75. The correct option is a).
Given :
Let is the daily average revenue. So:
Null Hypothesis is,
The Alternate Hypothesis is,
Here, the Z-test of a population mean is used because it is given that the population standard deviation is $75.
where is the sampleaverage revenue, is the standard deviation and n is the sample size.
Therefore, the correct option is a).
For more information, refer to the link given below:
Answer:
We would use Z-test of a population mean.
Step-by-step explanation:
We are given that an entrepreneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75. A sample of 30 days reveals a daily average revenue of $625.
And we have to test the hypothesis that the daily average revenue was $675.
Firstly, as we know that testing is always done on the population parameter.
So, let = daily average revenue over the pat 5 years
So, Null Hypothesis, : = $675
Alternate Hypothesis, : $675
Here, null hypothesis states that the owner's claim of average daily revenue was $675 over the past 5 years is correct.
And alternate hypothesis states that the owner's claim of average daily revenue was $675 over the past 5 years is not correct.
The test statistics that will be used here is Z-test of a population mean because here we have knowledge of population standard deviation of $75.
Test statistics = ~ N(0,1)
where, = sample average revenue = $625
= population standard deviation = $75
n = sample of days = 30
Therefore, to test the null hypothesis that the daily average revenue was $675, we should use Z-test of a population mean.
Answer:
y = 3x + 7
(Not sure what the question was so, I just put it in slope intercept form)
Step-by-step explanation:
Let x be Steve's age.
Steve = x
Steve's Mom = y
Now let's create an equation:
y - 7 = 3x
y = 3x + 7
(Not sure what the question was so, I just put it in slope intercept form)
Please let me know if I misunderstood the question that way I can help you! <3
Answer:
Steve's mom is 65.
Step-by-step explanation:
Let s = Steve's age.
s + (3s - 7) = 65
4s - 7 = 65
4s = 72
s = 18
Check:
Steve is 18
His mom is (3 * 18) - 7 = 54 - 7 = 47
14 + 47 = 65
Yep.
18 + 47 = 65
Express the equation in the form of y=mx+b
Enter your answer in the box
PLS HELP!!!
Answer:
y=7x+1
Step-by-step explanation:
Linear modeling
Consists of finding a linear equation that represents a situation in real life.
Jenny starts her stamps collection with only 1 stamp.
Then she collects 7 stamps per day.
Let's call
y=total amount of stamps in Jenny's collection
x=number of days
Knowing Jenny collects 7 stamps per day, then in x days, she collects 7x stamps. The total amount can be obtained by adding the first stamp she had. Thus, the model is:
y=7x+1
Answer:
Was it correct??? y=7x+1 is that correct or wrong?
Step-by-step explanation:
Answer:
2^7
Step-by-step explanation:
Dividing fractions with exponents means you subtract, so 2^6/2^4 = 2^6-4 =2^2
Multiplying numbers with exponents means adding the exponents, so 2^2+2^5 = 2^2+5 = 2^7
Answer:
2^7
Step-by-step explanation:
please mark me as brainlest
Answer:
70°
Step-by-step explanation:
61° + 49° + y = 180° (sum of angles of a triangle is always 180°)
so,
y= 180° - 61° - 49° = 70°