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
Ivan
3 years ago
11

One of the authors came across an article (USA Today, 2008) that said that on average Americans have visited 16 states in the Un

ited States. In a survey of 50 students in her introductory statistics class, she found the average number of states the students had visited to be 9.48 and the standard deviation to be 7.13. The data were not strongly skewed.​1. Identify the observational unit for this study.a. studentsb. Americansc. number of states2. Identify the variable of interest and whether it is categorical or quantitative.a. number of U.S. states visited, categorialb. number of students, quantitativec. number of students, categoriald. number of U.S. states visited, quantitative3. Regardless of your answer to part (c), state the null and the alternative hypotheses in symbols, to test whether the average number of states all students at the author’s school have visited is different from 16.a. H0: mu = 16, Ha: mu ≠ 16b. H0: mu = 16, Ha: mu > 16c. H0: mu = 16, Ha: mu < 164. Using the 2SD approach to find a 95% confidence interval for the average number of states all students at the author’s school have visited. Round to two decimal places
Mathematics
1 answer:
Daniel [21]3 years ago
7 0

Answer:

1. a. Students

2. d. number of U.S. states visited, quantitative

3. a. H o: mu = 16, Ha: mu ≠ 16

4. (7.46,11.50)

Step-by-step explanation:

1. The researcher is interested in finding out the average number of states in US that the students have visited.

The unit that is being observed to arrive at that conclusion is the Students. The observational unit for this study is  a. Students.

2. The variable of interest from the information above is the number of U.S. states visited. The observations recorded for this variable are in numbers which are numeric in nature. This implies that the variable is quantitative in nature.

Therefore, the answe  is d. number of U.S. states visited, quantitative

3. To test whether the average number of states all students at the author’s school have visited,

The null hypothesis (H o) is always given as the negation statement/null of what we wish to test.

So, we wish to test that the average is different from 16. Therefore, the null would be that the average is 16.

Answer  is a. H o: mu = 16, Ha: mu ≠ 16

4. A  95% confidence interval for the average number of states all students at the author’s school have visited can be calculated using the formula:

x  bar + or - 2 √s/n

=9.48 + or - 2 × 7.13/ √50

= (7.46,11.50)

The 95% confidence interval for the average number of states all students at the author’s school have visited is (7.46,11.50). The average falls betw 7.64 and 11.50.

You might be interested in
What is 15 times 7/5 compared to 15 equal?
Kaylis [27]

Answer:

I do not know

Step-by-step explanation:

4 0
3 years ago
The perimeter of a rectangle is 100 yd. if its width is four times its length, what is the area?
7nadin3 [17]

<span>Length = l</span>

<span>
Width = w</span>

<span>
Perimeter = p = 100

</span>

<span>Perimeter of rectangle = 2(l+w)</span>

<span>
100 = 2 (4w + w)</span>

<span>
100 = 2(5w)</span>

<span>
100 = 10w</span>

<span>
100/10 = w</span>

<span>
10 = w</span>

<span>
w =  10



Area of rectangle = length * width</span>

<span>
a = l*w</span>

<span> a = 4w*w</span>

<span>
a = 4w^2............(1)</span>

<span>
Put the value of w in (1)</span>

<span>
a = 4(10)^2</span>

<span>
a= 4(100)</span>

<span>
a = 400 yd^2</span>

4 0
3 years ago
Mx-y when m=2,x=7. And y= 5
Aleks [24]
(2•7)-5
14-5= 9
So the answer is 9
7 0
3 years ago
Read 2 more answers
The dot plots below show the ages of students belonging to two groups of music classes:
kolbaska11 [484]

Answer:

Step-by-step explanation:

8

4 0
2 years ago
Read 2 more answers
I need help on this :,)
Stella [2.4K]
4.5 times 2.5= 11.25
5 0
3 years ago
Read 2 more answers
Other questions:
  • Simplify the expression x^8y^-26/x^14y^-5*x^39y^-21 . After simplifying the given expression, the exponent of x is____ and the e
    11·1 answer
  • Graph the image of the given triangle under a dilation with a scale factor of -3 and center of dilation (0,0).
    8·2 answers
  • Jennifer is 20 miles north of her house, and she is driving north on the highway at a rate of 55 miles per hour whats the slpoe
    8·1 answer
  • Choose the situation in which the use of approximate numbers is most appropriate.
    11·1 answer
  • Please help i need the answer and how you got it!
    11·1 answer
  • FOIL backwards #5 please &amp; thank you :)
    12·2 answers
  • Which graph represents an exponential function?
    9·1 answer
  • Mark invests £12000 in a savings account. the account pays 1.5% compound interest per year. work out the value of her investment
    11·1 answer
  • An art club sells 42 large candles and 56 small candles.
    6·1 answer
  • Please help with this equation<br><br>Questions not that Hard its just Im really tired
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!