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cestrela7 [59]
3 years ago
13

Professor wonders whether a student's homework average (X) could be used to predict their final grade in the course (Y) . She ca

lculates a least-squares regression line, based on data from randomly selected students, and gets Y=21.839+0.724X. Please use this information to answer the following questions.
Which is the dependent variable, and why?

Based on the material taught in this course, which of the following is the most appropriate alternative hypothesis to use for resolving this question?

μ1≠μ2

μd≠0

β1≠0

p1≠p2

At least one of the means is different from at least one of the others.

A student's final course grade is not independent of their homework average.

A student's final course grade is independent of their homework average.
Mathematics
1 answer:
Anna11 [10]3 years ago
3 0

Answer:

The dependent variable is the final grade in the course and is the vriable of interest on this case.

H0: \beta_1 = 0

H1: \beta_1 \neq 0

And if we reject the null hypothesis we can conclude that we have a significant relationship between the two variables analyzed.

Step-by-step explanation:

On this case w ehave the following linear model:

Y= 21.839 +0.724 X

Where Y represent the final grade in the course and X the student's homework average. For this linear model the slope is given by \beta_1 = 0.724 and the intercept is \beta_0 = 21.839

Which is the dependent variable, and why?

The dependent variable is the final grade in the course and is the vriable of interest on this case.

Based on the material taught in this course, which of the following is the most appropriate alternative hypothesis to use for resolving this question?

Since we conduct a regression the hypothesis of interest are:

H0: \beta_1 = 0

H1: \beta_1 \neq 0

And if we reject the null hypothesis we can conclude that we have a significant relationship between the two variables analyzed.

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Problem 1.1
Vesna [10]

Answer:

Step-by-step explanation:

1 table and 2 chairs (2-seat table)

1 table and 4 chairs (4-seat table)

120 people so we need 120 chairs

Some Possibilities  :

120 /4 = 30

0( 2-seat table) and 30 (4- seat tables) because 0·2 + 30·4 = 0+120 = 120

2( 2-seat table) and 29 (4- seat tables) because 2·2 + 29·4 = 4+ 116= 120

4( 2-seat table) and 28 (4- seat tables) because 4·2 + 28·4 = 8+ 112= 120

...

120/2 = 60

60( 2-seat table) and 0 (4- seat tables) because 60·2 + 0·4 = 120 + 0 = 120

58( 2-seat table) and 1 (4- seat tables) because 58·2 + 1·4 = 116 + 4 = 120

56( 2-seat table) and 2 (4- seat tables) because 56·2 + 2·4 = 112 + 8 = 120

...

5 0
2 years ago
Randy has two 28.pound blocks of ice for his snow cone stand. if each snow cone.⅔ requires; Pound to ice, how many snow cones ca
Drupady [299]

Answer:

Randy can make 42 snow cones.

Step-by-step explanation:

28 divided by 2/3 = 42.

4 0
3 years ago
Read 2 more answers
Hey! Can someone please answer this?
Lelechka [254]

This picture should provide a full answer. What I did was rearrange the equation to get Tan(x) on one side, then in order to get rid of the Tan, I used Arctan, which got us the final answer.

7 0
2 years ago
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Write the equation of a horizontal line that passes through the point (–2, 2).
Aneli [31]

Answer:

option C

y = 2

Step-by-step explanation:

Given in the question,

a co-ordinate = (-2,2)

x = -2

y = 2

Equation of the straight line

y = mx + c

<em>here m = gradient of the line</em>

<em>         c = y - intercept</em>

<em />

<h3>we know that gradient of the horizontal line = 0</h3>

plug value in the equation above

y = (0)x + 2

y = 2

7 0
3 years ago
You are wrapping a gift box. You want to tie a ribbon around the box , so that whenever the ribbon intersects an edge of the box
Paha777 [63]

You are wrapping a gift box. The length of ribbon = length + width + height of box.

<u>Solution:</u>

Given, You are wrapping a gift box.  

You want to tie a ribbon around the box, so that whenever the ribbon intersects an edge of the box, its distance to the nearest corner is 1/3 the length of the box.  

We have to find how long must the ribbon be?

The figure of this problem is attached below

Now, assume we started to tie at one edge, then next we can tie at straight parallel edge, we can continue till our process ends.

Then, total length of the ribbon = length of box + width of box + height of box.

Hence, the length of ribbon = length + width + height of box.

7 0
3 years ago
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