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
Vikentia [17]
3 years ago
9

Suppose the mean GPA of all students graduating from a particular university in 1975 was 2.40. The registrar plans to look at re

cords of students graduating last year to see if the mean GPA has changed. Let u = the true mean GPA.
Choose the correct the null and alternative hypotheses for this investigation.

A) H0:mu != 2.30 ; H0 mu = 2.30
B) H0:mu = 2.30 ; H0 mu! = 2.30
C) H0:mu = 2.30 ; H0 mu > 2.30
D) H0:mu = 2.30 ; H0 mu < 2.30
E) H0:mu > 2.30 ; H0 mu = 2.30
F) H0:mu < 2.30 ; H0 mu = 2.30
Mathematics
1 answer:
ycow [4]3 years ago
6 0

Answer:

Correct option:

(B) <em>H₀</em>: <em>μ</em> = 2.40 vs. <em>Hₐ</em>: <em>μ</em> ≠ 2.40.

Step-by-step explanation:

The registrar of particular university in 1975 plans to look at records of students graduating last year to see if the mean GPA has changed from 2.40.

The registrar can use a single mean test to determine whether the mean has changed or not.

The hypothesis can be described as:

<em>H₀</em>: The mean GPA is 2.40, i.e. <em>μ</em> = 2.40.

<em>Hₐ</em>: The mean GPA is different from 2.40, i.e. <em>μ</em> ≠ 2.40.

To perform the test the registrar can either use a <em>z</em>-distribution or a <em>t</em>-distribution.

If the data provided gives some insight about the population standard deviation and the sample selected is quite large then the <em>z</em>-distribution can be used.

Otherwise it is wiser to use a <em>t</em>-distribution.

The decision rule is:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Thus, the correct option is (B).

You might be interested in
-7=7d-8 solve for the variable d
kvv77 [185]

-7 = 7d - 8

Add 8 to both sides.

1 = 7d

Divide both sides by 7.

<h3>d = 1/7</h3>
3 0
3 years ago
Pleaseeee helpppp !!!!!!!! Will mark Brianliest !!!!!!!!!!!!!
Goryan [66]

Answer:

I think you're supposed to add all the fives together. That is what MY teacher taught me to do :/

Step-by-step explanation:

The shape is a square that is tilted and looks like a rhombus. Just add the 5's together.

4 0
3 years ago
At most, Kyle can spend $50 on sandwiches and chips for a picnic.
trapecia [35]

Answer:

21

Step-by-step explanation:

hihihihihiiiiiiiii

8 0
3 years ago
What is the discriminant of the quadratic equation 0 = –x2 + 4x – 2?<br><br> –4<br> 8<br> 12<br> 24
monitta

Answer:

8

Step-by-step explanation:

0 = –x^2 + 4x – 2

This is of the form

ax^2 +bx +c

a = -1  b = 4  x = -2

The discriminant is

b^2 -4ac

4^2 - 4(-1)(-2)

16 - 8

8

6 0
3 years ago
Read 2 more answers
The mean of the values in a data set is c. If each of the values in the data set were multiplied by 6, what would be the mean of
oksian1 [2.3K]

Answer:

Mean of the data would be 6c

Step-by-step explanation:

<u>Rule to Remember:</u> Whenever each term of the data is multiplied by the same number, the new mean is previous mean multiplied by that number.

In this case, original value of mean was c. Each value of the data is multiplied with 6 so a result the new mean would be 6 times the original mean i.e. 6c

Let us consider that original values in the data set are x, y and z. Their mean would be:

Mean=\frac{x+y+z}{3}

If each value of the data is multiplied with 6, the new values would be 6x, 6y and 6z. The mean in this case will be:

Mean=\frac{6x+6y+6z}{3}\\Mean=\frac{6(x+y+z)}{3}\\Mean=6\times\frac{x+y+z}{3}\\Mean=6c

We can see from above that the new mean is 6 multiplied to the original mean.

Therefore, the answer to this question is 6c.

7 0
3 years ago
Other questions:
  • given the height and the circumference of the base of a cylinder describe how to find the surface area of the entire cylinder
    15·1 answer
  • Find the surface area of the regular pyramid shown to the nearest whole number. <br><br> Thank you.
    15·1 answer
  • If f(x) is a linear function and the domain of f(x) is the set of all real numbers, which statement cannot be true?
    5·1 answer
  • Write the slope-intercept form of the equation of the line perpendicular to the graph of y=-3/2x-7 that passes through (3,-2)
    5·1 answer
  • What is mBD ? <br> A.112 <br> B.168<br> C.126 <br> D.154
    7·2 answers
  • Which algebraic expression is polynomial?
    10·1 answer
  • Whats the solution pls help
    15·2 answers
  • Hours<br> 3 5 8 12<br> paid $29.25 $48.75 $74 $111
    14·1 answer
  • How is everyone?<br> Como estas?
    13·2 answers
  • Kelly has a universal life policy with a face value of $500,000. The cash surrender value of the policy is $185,200 and Kelly ha
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!