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]
2 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]2 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
WILL GIVE BRAINLIEST TO PERSON WHO ANSWERS
Tpy6a [65]
A² - 225 = (a-15)(a+15)
..................................................................
7 0
3 years ago
5:15 as a equivalent ratio
natima [27]

Answer:

1:3

Step-by-step explanation:

5 is 1/3 of 15

hope this helps! :)

3 0
3 years ago
2x+3=x+15x+6−5<br>Solve​
Gnesinka [82]

Answer:

x = 1/7

Step-by-step explanation:

2x + 3 = x + 15x + 6 − 5

<em>Combine like terms and solve:</em>

2x + 3 = 16x + 1

-14x + 3 = 1

-14x = -2

x = 1/7

hope this helps!! p.s. i really need brainliest :)

4 0
2 years ago
Read 2 more answers
What is the volume of a cylinder with a height of 7.1 ft and a base with a diameter of 12.8 ft, to the nearest tenth of a cubic
Semenov [28]

Answer:

V=π(d

2)2h=π·(12.8

2)2·7.1≈913.62541ft³ Step-by-step explanation: because i said so

7 0
3 years ago
The point R is halfway between the integers on the number line below and represents the number ____. (Use the hyphen for negativ
PSYCHO15rus [73]
I guess ur just gunna have to bear with whatever until we have a multiple choice answer selection.
5 0
2 years ago
Other questions:
  • Invests 5000 dollars. Pays 5.25% monthly
    9·1 answer
  • What is the sequence of 100,99,97,94,90
    5·2 answers
  • Equivalent expression 3.4-2.8d+2.8d-1.3
    12·1 answer
  • What does x/11=1/11 equal
    7·1 answer
  • Solve for d.<br><br> 41=12d-7<br><br> d= ?
    13·2 answers
  • If m<br> c is greater than mZE, then AB is<br> ??
    14·1 answer
  • Which expression converts 100 inches per minute to feet per minute?
    12·1 answer
  • HELP i have no clue how to do this hahah
    7·1 answer
  • Plz plz huty The chart below shows Mrs. Thompson's grocery bill. What is the average amount Mrs. Thompson spent on groceries?
    11·2 answers
  • Please help...... fast​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!