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
wariber [46]
3 years ago
14

A professor believes the students in a statistics class this term are more creative than most other students attending the unive

rsity. A previous study found that students at the university had a mean score of 35 on a standard creativity test, and the current class has an average score of 40 on this scale with an estimated population standard deviation of 7. The standard deviation of the distribution of means is 1.63. What is the t score?
A. (40 – 35) / 7 = 0.71

B. (40 – 35) / 1.63 = 3.07

C. (40 – 35) / 7² = 5 / 49 = 0.10

D. (40 – 35) / 1.63² = 5 / 2.66 = 1.88
Mathematics
1 answer:
djverab [1.8K]3 years ago
4 0

Answer:

Correct option: B

Step-by-step explanation:

The professor can perform a One-mean <em>t</em>-test to determine whether the average score of the students in his class is more than the average score of all the students attending university.

A <em>t</em>-test will be used instead of the <em>z</em>-test because the population standard deviation is not provided instead it is estimated by the sample standard deviation.

The hypothesis for this test can be defined as follows:

<em>H₀</em>: The average score of the students in his class is not more then the entire university, i.e. <em>μ ≤ 35</em>.

<em>Hₐ</em>: The average score of the students in his class is more then the entire university, i.e. <em>μ > 35</em>.

Given:

\bar x=40\\SE_{\bar x}=1.63

The test statistic is:

t=\frac{\bar x-\mu}{SE_{\bar x}}=\frac{40-35}{1.63}=3.0674\approx3.07

Thus, the correct option is (B).

You might be interested in
Rectangle WXYZ with y axis<br>​
Gre4nikov [31]

Answer:

I dont understand comment on this and i can help you out

Step-by-step explanation:

:)

7 0
3 years ago
Read 2 more answers
Jamie can read at a speed of 65 pages per hour. If she reads a novel that has 400 pages, how long will it
horsena [70]
To find the answer set up an equation:
400 \: pages \times  \frac{1 \: hour}{65 \: pages}  =
Using this set up we can cross our units of pages since they are on opposite side of the proportion, leaving us with the desired units of hours.

Then divide 400 by 65 which will give us our answer: 6.15 or about 6 hours for Jamie to finish her reading.
8 0
3 years ago
Which is not a way to name a line, (XYZ)?
lana66690 [7]

Answer:

YZX, YXZ, ZXY, XZY

Step-by-step explanation:

6 0
3 years ago
What is y divided by 2; y=4
shusha [124]
Y/2=?
y=4
4/2=2
so y divided by 2 is 2.
Have a nice day!!~~~ ^-^
4 0
3 years ago
Please help meeeeeeeee!!!!!!!!​
icang [17]

Answer:

MAG ANSWER KA MAG ISA!!!!!!

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a true
    10·1 answer
  • What method would you choose to solve the equation 2x^2-7=9
    6·1 answer
  • Find each percent increase round to the nearest percent from $5 to $8
    7·1 answer
  • PLEASE HELP!!!
    14·2 answers
  • The floor of Aisha’s rectangular bedroom has an area of 144. Which are possible dimensions of her bedroom? Check all that apply.
    5·2 answers
  • (a) Compute the sums of the squares of Rows 1-4 of Pascal's Triangle. That is, compute:
    8·1 answer
  • -8x+2y=-2<br> 4x+4y=-4<br> What is the solution to the system
    7·1 answer
  • A square garden is 12 m long. A hedge wall 1 meter wide surrounds
    11·1 answer
  • Describe how the point-slope formula is useful when writing the equation of a trend line
    6·1 answer
  • I need help with this and the first person who can answer this correctly gets a BRANLIST​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!