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
The school is 3.64 miles from Tonyas house and 1.29 miles from Jamal's house.
SpyIntel [72]

Answer:

2.35 miles

Step-by-step explanation:

5 0
2 years ago
Solve the equation by completing the square. Round to the nearest hundredth if necessary. 3x^2 - 6x - 24 = 0
Fofino [41]

x= 4, -2 or 3(x-4)(x+2)

8 0
2 years ago
Can someone help me out with this?
Anton [14]

Answer:

.5? or 1/2

Step-by-step explanation:

i think its half, because the Y factors are going down by half.

i hope that kinda made sense.

5 0
2 years ago
Megan expects to save an average of 5 dollars per
ivolga24 [154]

Answer:

Step-by-step explanation:

Ordered pair (0, 0) & (0.5, 2.5)  will fall on the line of graph

Step-by-step explanation:

Megan expects to save an average of 5 dollars per week from her babysitting earnings.

=> Saving Per  week  = 5 $

Saving in 0.5 Week = 0.5 * 5 = 2.5 $

hence ordered pair (0.5, 2.5)  will fall on the line of graph

Saving in 3 Week = 3 * 5 = 15 $

Hence (3, 18) will not fall on  line

Saving in 0 Week = 0.5 * 0 = 0 $

hence ordered pair (0, 0)  will fall on the line of graph

Saving in 4.5 Week = 4.5 * 5 = 22.5 $

Hence (4.5, 30) will not fall on  line

3 0
3 years ago
Read 2 more answers
Use the given information to determine if TU ||QS.<br> Answer with a simple yes or no.
AfilCa [17]

Answer:

I would pick no, because when u do the math

8 0
2 years ago
Other questions:
  • Describe how the graph of each function compares with the graph of the parent function y=log5 x+1
    12·2 answers
  • The graph shows the solution to the previous system of equations
    9·1 answer
  • Write an equation in slope intercept form of each line
    7·1 answer
  • Mitchell works at the local movie theater. He currently has $395 in his
    9·1 answer
  • Your friend’s heart beats 18 times in 15 seconds when at rest. While running, your friend’s heart beats 25 times in 10 seconds.
    6·1 answer
  • Help me fast!!
    9·2 answers
  • What's 1003 in standard form?
    15·1 answer
  • Determine if the side lengths could form a triangle. Use an inequality to prove your answer.
    14·1 answer
  • Mrs. Speas has $138 in her bank account during Week #1. At the end of each week, she deposits $55 into her bank account. What is
    14·2 answers
  • Quick please I need this before I go
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!