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
A room is 20 ft by 15 ft. The carpeting selected is $
MrMuchimi
The room is 20 / 3 yd by 15 / 3 = 5 yd, which is (20 / 3) x 5 = 33.33 square yards. So the cost of carpeting would be 33.33 x 37 = $1233.33
3 0
3 years ago
Can anyone remind me how to do a slope again? I just need a thorough explanation. Thanks!!
wariber [46]

Answer:

idk what you mean by thorough explanation but:

  • get two points of the line (x1, y1) and (x2, y2)
  • plug them into the formula: y2 - y1/x2 - x1
  • solve

8 0
3 years ago
Read 2 more answers
your friend spends 6+5x minutes lifting weights and 9x+8 minutes running on a treadmill. write a polynomial that represents how
ser-zykov [4K]

(4x + 2) more minutes is spent running on the treadmill than lifting weights

<em><u>Solution:</u></em>

Given that,

your friend spends 6+5x minutes lifting weights

9x+8 minutes running on a treadmill

Therefore,

Time spent on lifting weight = 6 + 5x minutes

Time spent on treadmill = 9x + 8 minutes

<em><u>Write a polynomial that represents how much more time is spent running on the treadmill than lifting weights</u></em>.

Thus we need to find the difference between time spent on treadmill and time spent on lifting weight

Difference = Time spent on treadmill - Time spent on lifting weight

Difference = 9x + 8 - (6 + 5x)

Difference = 9x + 8 - 6 - 5x = 4x + 2

Thus 4x + 2 more minutes is spent running on the treadmill than lifting weights

7 0
3 years ago
A box contain 12 balls in which 4 are white 3blue and 5 are red.3 balls are drawn at random from the box. Find the chance that a
PIT_PIT [208]

Answer:

white: 1/3, blue: 1/4, red: 5/12

Step-by-step explanation:

Take the amount of balls each color has and divide by 12.

White:

4/12 = 1/3

Blue:

3/12 = 1/4

Red:

5/12 (can't simplify)

3 0
3 years ago
Read 2 more answers
What is the area of the real objet that the scale drawing models
11111nata11111 [884]

Answer:

C. 25 square cm

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • Solve for y. 3(y-3)=6y
    7·1 answer
  • You do not need to flip the inequality sign when solving the following -5 ≤ 4r + 3.
    8·2 answers
  • Find the difference: 28y − 16y. Select one of the options below as your answer:.A. 12y. B. 10y. C. -44y. D. -12y
    8·1 answer
  • 11. Point A(-2,9) is rotated 180 degrees what is the value of A'? *
    8·2 answers
  • Describe how to solve problems for the area of a reduced or enlarged figure when the scale factor and dimensions of the original
    11·2 answers
  • CAN I HAVE HELP!!!!!!!!!!!
    12·2 answers
  • The perimeter of parallelogram WXYZ is 50 millimeters. What is WX?
    10·1 answer
  • Bedford's law states that the probability that a number in a set has a given leading digit d, is P=log(d+1)-log(d), state with p
    15·1 answer
  • Find the 78th term of the arithmetic sequence<br> -12,-13,-14,
    13·1 answer
  • Does anyone know a quick method to divide a whole number with a decimal
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!