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
uysha [10]
3 years ago
6

According to a 2014 research study of national student engagement in the U.S., the average college student spends 17 hours per w

eek studying. A professor believes that students at her college study less than 17 hours per week. The professor distributes a survey to a random sample of 80 students enrolled at the college. From her survey data the professor calculates that the mean number of hours per week spent studying for her sample is 15.6 hours per week with a standard deviation of 4.5 hours per week. The professor chooses a 5% level of significance. What can she conclude from her data? Group of answer choices The data supports the professor’s claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week. The professor cannot conclude that the average number of hours per week spent studying for students at her college is less than 17 hours per week. The sample mean of 15.6 is not significantly less than 17. Nothing. The conditions for use of a T-model are not met. The professor cannot trust that the p-value is accurate for this reason.
Mathematics
1 answer:
Nadusha1986 [10]3 years ago
4 0

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 17

For the alternative hypothesis,

µ < 17

This is a left tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 80,

Degrees of freedom, df = n - 1 = 80 - 1 = 79

t = (x - µ)/(s/√n)

Where

x = sample mean = 15.6

µ = population mean = 17

s = samples standard deviation = 4.5

t = (15.6 - 17)/(4.5/√80) = - 2.78

We would determine the p value using the t test calculator. It becomes

p = 0.0034

Since alpha, 0.05 > than the p value, 0.0043, then we would reject the null hypothesis.

The data supports the professor’s claim. The average number of hours per week spent studying for students at her college is less than 17 hours per week.

You might be interested in
The Turtle and Achilles compete. They start at the same time from the same place. Achilles runs at a speed of 13 mph while the T
spayn [35]

Answer:

The competition took 12.5 minutes.

Step-by-step explanation:

Let the time taken by Achilles to complete the competition is h hours.

Now, Achilles runs at a speed of 13 mph while the Turtle moves at a speed of 1 mph.

So, the competition was 13h miles long.

Now, Turtle will take h hours to complete h miles of the competition.

Now, given that (13h - h) = 2.5

⇒ 12h = 2.5

⇒ h = 0.208 hours.

⇒ h = 12.5 minutes.

Therefore, the competition took 12.5 minutes. (Answer)

3 0
3 years ago
The sum of three consecutive integers is 48. What are the three numbers?
Alinara [238K]

What three consecutive integers have a sum of 48? Which means that the first number is 15, the second number is 15 + 1 and the third number is 15 + 2. Therefore, three consecutive integers that add up to 48 are 15, 16, and 17.

7 0
3 years ago
1/10 ton of sand to 4/5. What is the ratio in ton per minute?
g100num [7]

1/10 4/5 we need common denominaters so

1/10 4(2)/(5)= 8/10

5 0
3 years ago
Josie is looking at buying a new phone for $800.If she does not want to pay the entire $800 she has the option of buying the pho
exis [7]

Answer:A 131.25%

Step-by-step explanation:

6 0
3 years ago
1 g = __ mg? someones please help me on this i am not very good at these
Andrew [12]

the answer of your question is 1000mg
8 0
2 years ago
Read 2 more answers
Other questions:
  • max's stamp collection has stamps for different countries.he has 12 stamps from canada.of those tweleve,2/3 of them have picture
    15·2 answers
  • Which trigonometric function would you use to solve the problem?
    13·1 answer
  • X^2-7x-6=0<br> Use the quadratic formula to complete the equation show step by step
    13·2 answers
  • Need help ...............................
    9·1 answer
  • Study the graphs, then select the best answers from the drop-down menus.
    8·1 answer
  • You can earn 5 coins
    13·1 answer
  • So I need some help please
    5·1 answer
  • 80% OFF
    12·1 answer
  • What is the slope-intercept form of the linear equation 2x + 3y = 6? Drag and drop the appropriate number, symbol, or variable t
    7·2 answers
  • How do you do this. Please give a full answer and explain why.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!