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Aneli [31]
4 years ago
9

b. Interpret the Rsquared value. Does the multiple regression equation help us predict the total golf score much better than we

could without knowing that​ equation? A. No​, because Rsquared is close to 1. B. Yes​, because Rsquared is not close to 1. C. No​, because Rsquared is not close to 1. D. Yes​, because Rsquared is close to 1.
Mathematics
1 answer:
Veseljchak [2.6K]4 years ago
7 0

Answer:

Depending upon the golf score predictors we can conclude the answer from given Conditional statements

If Someone want Total golf score better then, following .condition

Yes, Because R squared is close to 1 .  ....(If Regression values are prefect to fit with model then only)

<em>(But the data is not sufficient to say 100%, it depends on score given)</em>

Step-by-step explanation:

Given :

Explanatory Question on r-squared in regression.

To Find :

Does regression equation help us to know total golf score much better.

Solution;

As  in Question there is no golf score given so we cant see "yes" or "no".

But we can be conditional here ,

1) If golf score to be accurate then , multiple regression predict points should fit the model prefect ,hence the R squared value "<em>must be close to 1</em>" .

2) If gold score is not accurate then multiple regression   suggest that model does  not explain any variables, no linear relationship.

then r squared value <em>"must not be close to 1".</em>

Depending upon the golf score predictors we can conclude the answer from given Conditional statements.

that  Yes, Because R squared is close to 1 .

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Svetlanka [38]
X / 40 = 4 /32   ( similar triangles)

x / 40 = 1 / 8

x = 40/8 = 5 answer
5 0
3 years ago
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According to a research center, 16% of all merchandise sold in a particular country gets returned. A department store in a certa
Mamont248 [21]

Answer:

a) point estimate of the proportion of items returned for the population of sales transactions at the store in the given city

Point estimate = 0.3

b) The 95% confidence interval for the proportion of returns at the store in the given city

( 0.19958,0.40042)

Step-by-step explanation:

Given the Population proportion 'P'= 16% = 0.16

Given data a department store in a certain city sampled 80 items sold in January and found that 24 of the items were returned

The sample proportion p = \frac{x}{n}

here x =24 and n = 80

The sample proportion p = \frac{x}{n} = \frac{24}{80} = 0.3

a)<u> Point estimate</u>:-

A point estimate of the true proportion P

Point estimate = p = \frac{x}{n}

point estimate of the proportion of items returned for the population of sales transactions at the store in the given city

p = \frac{x}{n} = \frac{24}{80} = 0.3

b) <u>The 95%  confidence interval for the proportion </u>

The 95% confidence interval for the proportion of returns at the store in the given city

(p - z_{\alpha } \sqrt{\frac{p(1-p)}{n} } , p + z_{\alpha }\sqrt{\frac{p(1-p)}{n} } )

substitute all values we get ,

(0.3 - 1.96 \sqrt{\frac{0.3(1-0.3)}{80} } , 0.3 + 1.96\sqrt{\frac{0.3(1-0.3)}{80} } )

on simplification, we get

(0.3-0.10042 ,0.3+0.10042)

( 0.19958,0.40042)

<u>Conclusion</u>:-

a)  point estimate of the proportion of items returned for the population of sales transactions at the store in the given city

Point estimate = 0.3

b) The 95% confidence interval for the proportion of returns at the store in the given city

( 0.19958,0.40042)

5 0
4 years ago
Help for lots of points
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Answer:

45

Step-by-step explanation:

i hope this helps you :) i would do the middle one but you dont need that one

4 0
3 years ago
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At XYZ Middle School, 40 percent of the 500 students ride their bikes or walk to school. How
iVinArrow [24]

Answer:

200 students either bike or walk to school

Step-by-step explanation:

0.4 = 40%

500 * 0.4 = 200

40% is 200 students

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7 0
3 years ago
Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15. what is her z score?
Andreas93 [3]

Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

According to the given question.

Tobi scored 145 marks on an iq test.

⇒ x = 145

Mean, μ = 100

Standard deviation, σ = 15

As we know that,

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values.

And it is calculated by formula

Z = x -μ/σ

Where,

Z is a Z-score

μ is mean

x is the observed value

Therefore,

The Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15

= 145 - 100/15  

= 3

Hence,Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

Find out more information about Z-score here:

brainly.com/question/15016913

#SPJ4

7 0
2 years ago
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