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
erma4kov [3.2K]
3 years ago
15

According to a survey, the average American person watches TV for 3 hours per week. To test if the amount of TV in New York City

is less than the national average, a researcher decides to do a hypothesis test, at a 10% significance level. She surveys 26 New Yorkers randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 2.5 hours per week, and the sample standard deviation (s) is 1.1 hours. H0: μ≥3; Ha: μ<3. α=0.1 (significance level) What is the test statistic (t-value) of this one-mean hypothesis test (with σ unknown)? Round your final answer to two decimal places. Provide your answer below:
Mathematics
2 answers:
Ne4ueva [31]3 years ago
5 0

Answer:

-1.32

Step-by-step explanation:

Since we want to test if \bf \mu of the alternative hypothesis is less than the established in the null, this is a left-tailed test.

<em>At 10% significance level the t-statistic (t-value) is the value of t such that the area under the Student's t-distribution curve with 25 degrees of freedom (sample size -1) to the left of  t equals 10% = 0.1 </em>

Either by using a table or the computer, we find  

\bf t= -1.316\approx -1.32

butalik [34]3 years ago
4 0

Answer:

t=2.32

Step-by-step explanation:

t-value= (population mean-sample mean)/√ (sample SD²/sample size)

t= (3-2.5)/√(1.1²/26)

You might be interested in
The table shows the linear relationship between the average height in feet of trees on a tree farm and the number of years till
siniylev [52]

Step-by-step explanation:

the equation :

Hn = 7n + 3

where :

Hn : the height of trees at year to-n

n : year to-n (n = 1,2,3,...)

so, the rate of change : increasing 7 feet per year.

8 0
3 years ago
The figure shows a net of a cube. Which expression can be used to find the total surface area of the cube?
sergij07 [2.7K]

Answer:

Option C: 6(7 * 7)

Step-by-step explanation:

There are six faces of the cube. Since each face is 7 by 7 units, there are 6(7 *7) units total.

6 0
1 year ago
Read 2 more answers
Assume you have two six-sided dice - both numbered 1 to 6 - and add the total of the dice after each roll. Leave all answers as
Effectus [21]
The probability of rolling two dice and getting a four is 3/36.
8 0
2 years ago
Solve the system of equations by any method.
Fofino [41]
The answer is <span>C. (4/9, -2 7/8)</span>
4 0
3 years ago
Read 2 more answers
The hypotenuse of a right
Lina20 [59]
None I would think because none of them are them because if you it is not the
8 0
3 years ago
Other questions:
  • What is 79.623 rounded to the nearest hundred??
    11·1 answer
  • The length of the minute hand is 150% of the length of the hour hand.
    12·1 answer
  • Two similar prisms have heights 4 cm and 10 cm. What is the ratio of their surface areas?
    5·2 answers
  • What is the equation of the line that passes through (-3, -1) and has a slope of 2/5 ? Put your answer in slope-intercept form.
    15·2 answers
  • How many bags of seeds will she need
    14·1 answer
  • 1 (2x + 3) (3x-5) 2. (3x + 5y)3 3. (3x + 5y - 2z)?​
    13·1 answer
  • david quiere saber cuanto requiere invertir mensualmente para obtener $30,760.08 durante 6 meses si los invierte con el 12% capi
    9·1 answer
  • Please help.<br> Algebra.
    5·1 answer
  • Alisha wants to cover the floor of a room 8 m long and 5 m wide with rectangular tiles. If each rectangular tile is of length 40
    12·1 answer
  • Examine the following three premises: i. All kids who have a smartphone play mobile legends.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!