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
fomenos
3 years ago
14

Georgia’s scores in six subjects are 89, 75, 92, 68, 78, 75, and 80. If she finds a single value that summarizes all the values

in the data set, which measure could she be finding?
Mathematics
1 answer:
Kruka [31]3 years ago
8 0

Answer:

mean

Step-by-step explanation:

mean .

mean is regarded as the average value calculated from a data set .

mean = total sum of values / total number of values.

You might be interested in
A wise man once said, "400 reduced by 4 times my age is 8." What is his age?
Mrac [35]

Answer:

1,600 years old I think

Step-by-step explanation:

8 0
2 years ago
The graph of a system of two linear equations is a pair of lines that intersect at the point . How many solutions does the syste
yawa3891 [41]

Answer:

1 solution

Step-by-step explanation:

3 0
2 years ago
Pls help and show workings
oksano4ka [1.4K]

Answer: x = 15

Step-by-step explanation:

same thing. here's my work:

<em>4x - 5 = 3x + 10</em>

<em>4x - 5 (+ 5) = 3x + 10 (+ 5)</em>

<em>4x = 3x + 15</em>

<em>4x (- 3x) = 3x (- 3x) + 15</em>

x = 15

5 0
2 years ago
Alumni donations are an important source of revenue for universities. One fundraiser is trying create a model to predict alumni
amid [387]

Answer:

Step-by-step explanation:

Hello!

Given the variables

Y: Alumni donations

X₁: Graduation rate

X₂: percentage of classes with less than 20 students

X₃: student/faculty ratio

The multiple regression model is:

Y= β₀ + β₁X₁ + β₂X₂ + β₃X₃ + ε

1)

<u>The correct option is</u>

e. none of the above.

The measurement used to determine the validity of the test is the coefficient of determination R².

2)

The general interpretation of a regression coefficient βi is:

"quantifies the modification of the mean of Y when the response variable Xi increases one unit while all the other response variables remain constant"

^β₁= b₁= 0.748% represents the "graduation rate coefficient"

It is the modification of the average alumni donations when the graduation rate increases one unit while the  percentage of classes with less than 20 students and the student/faculty ratio remain constant.

<u>Correct option:</u> d. For each point increase in graduation percentage, alumni giving rate increases by .75%

3)

The intercept (b₀) is the value of the average of Y when all response variables are zero.

b₀= -20.72%

Using a general interpretation: -20.72% is the average alumni donation when the graduation rate, percentage of classes with less than 20 students and student/faculty ratio are zero.

<em>Of course this interpretation is theoretical, meaning, it does not have any practical application.</em>

<u>The correct option is:</u>

e. none of the above.

4)

To determine how does and increase of the student/faculty ratio you have to take a look at the estimation of the regression coefficient that corresponds to that variable:

b₃= -1.1920

This ratio means that every time the student/faculty ratio increases one unit, the giving rate decreases 1.192%

<u>Correct option:</u>

c. Alumni giving rate drops since the sign of the coefficient is negative

5)

I'll use the given p-values to check the significance of each individual hypothesis test. The decision rule for all of them is as follows:

If p-value ≤ α, reject the null hypothesis.

If p-value > α, don't reject the null hypothesis.

I)

H₀: β₁ = 0

H₁: β₁ ≠ 0

α: 0.05

p-value: 4.8E-5 ⇒ Reject the null hypothesis.

II)

H₀: β₂ = 0

H₁: β₂ ≠ 0

α: 0.05

p-value: 0.835844 ⇒ Do not reject the null hypothesis.

III)

H₀: β₃ = 0

H₁: β₃ ≠ 0

α: 0.05

p-value: 0.003538 ⇒ Reject the null hypothesis.

<u>Correct option:</u>

d. Graduation rate & student/faculty ratio

6)

R²= 0.6999⇒ 69.99%

<u>Correct interpretation:</u>

c. approximately 70% of the change in alumni giving rate is explained by the change in the independent variables

7)

^Y= -20.72 + 0.748X₁ + 0.029X₂ - 1.192X₃

For X₁= 85, X₂= 52 and X₃= 12

^Y= -20.72 + 0.748*85 + 0.029*52 - 1.192*12= 30.064

<u>Correct option </u>

a. 30.08

I hope it helps!

5 0
2 years ago
A special number cube has the first six prime numbers as possible outcomes. Find the expected value of a roll of the
nalin [4]

Answer:

D

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • What is 100×23+34-97=___-34+23
    12·1 answer
  • How many millimeters are there in 5 centimeters?<br><br> 10 pts please answer!
    12·1 answer
  • State the first 3-digit multiple of 7​
    12·1 answer
  • Which expression is equivalent to 1/3(9x + 12) + 4x + 6?
    9·2 answers
  • Find the missing side. Round to the nearest tenth.
    8·1 answer
  • What percent is 50% of 50% of x
    15·1 answer
  • 15+21b Please help me, i suck at math
    14·1 answer
  • PLZ HELP, 4/5 * 2/3. exsplain how you got it too. i just need an exsplaination. step by step.
    9·2 answers
  • Please help me find the equation it so hard
    9·1 answer
  • Help help math math
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!