1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
madam [21]
2 years ago
8

Tell me if I'm correct...im not sure....thanks

Mathematics
2 answers:
Zina [86]2 years ago
6 0

Answer:

Your answer is correct.

Sever21 [200]2 years ago
6 0

Answer:

Genuilly I think you’re correct

sorry if it wrong

but, it looks correct and I think it’s correct

You might be interested in
What's the mode and median for 22,36,9,27,30,20
zalisa [80]
Mode: none. All values occur once
Median 24.5
6 0
2 years ago
The American Water Works Association reports that the per capita water use in a single-family home is 63 gallons per day. Legacy
Debora [2.8K]

Answer:

t=\frac{60-63}{\frac{8.9}{\sqrt{28}}}=-1.784    

df=n-1=28-1=27  

p_v =P(t_{(27)}  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the true mean is less than 63 gallons per day at 1% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=60 represent the sample mean

s=8.9 represent the sample standard deviation

n=28 sample size  

\mu_o =68 represent the value that we want to test

\alpha=0.01 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean is less than 63, the system of hypothesis would be:  

Null hypothesis:\mu \geq 63  

Alternative hypothesis:\mu < 63  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{60-63}{\frac{8.9}{\sqrt{28}}}=-1.784    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=28-1=27  

Since is a one side lower test the p value would be:  

p_v =P(t_{(27)}  

Conclusion  

If we compare the p value and the significance level given \alpha=0.01 we see that p_v>\alpha so we can conclude that we have enough evidence to fail reject the null hypothesis, so we can't conclude that the true mean is less than 63 gallons per day at 1% of signficance.  

5 0
3 years ago
Need answer ASAPPPppp:”)
Harrizon [31]
Its b i had this question a minute ago

6 0
3 years ago
How to simplify this 5x^2 -3 (x + 2) - 2x​
lukranit [14]
Answer: 5x^2 - 5x - 6

work:
5x^2 -3(x+2) - 2x
distribute
5x^2 -3x - 6 - 2x
combine like terms
5x^2 -5x - 6
4 0
3 years ago
The cylindrical jar above has a height of 12 centimeters and a radius of 4 centimeters. The jar contains 20 spherical marbles. E
Katen [24]
The answer is 57.72 cm.
5 0
3 years ago
Other questions:
  • A light bulb consumes 3600 watt-hours per day. How long does it take to consume 18900 watt-hours?
    15·2 answers
  • What's 1.5kg into ounces
    6·2 answers
  • The sphere shown below is placed in a full overflow cup and sinks to the bottom. How much water is displaced by the sphere?Lecto
    12·1 answer
  • PLLSS HELP THANK YOU:) What is the equation of the line in standard form? A function graph of a line with two points (-3,2) and
    7·2 answers
  • Geometry math question no Guessing and Please show work
    12·1 answer
  • Brendon sells tires at the local auto parts store. He told a customer that the tire width for a new tire was 21.5 centimeters. W
    10·2 answers
  • Solve the triangle give the measure of x
    13·1 answer
  • I need the know the answer in A B C because I’m confused
    6·1 answer
  • Round 5049 correct to 1 significant figure​
    6·2 answers
  • A triangle has two sides of length 14 and 19. What is the largest possible whole-number length for the third side?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!