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Alja [10]
3 years ago
11

For a sample of eight bears, researchers measured the distances around the bears' chests and weighed the bears. Minitab was used

to find that the value of the linear correlation coefficient is r=0.989. Using alph=0.05, determine if there is a linear correlation between chest size and weight. What proportion of the variation in weight can be explained by the linear relationship between weight and chest size?
Mathematics
1 answer:
kkurt [141]3 years ago
4 0

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Correlation Coefficient (r) = 0.989

alph=0.05

Number of observations (n) = 8

determine if there is a linear correlation between chest size and weight.

Yes, there exists a linear relationship between chest size and weight as the value of the correlation Coefficient exceeds the critical value.

What proportion of the variation in weight can be explained by the linear relationship between weight and chest size?

To determine the the proportion of variation in weight that can be explained by the linear regression line between weight and chest size, we need to obtain the Coefficient of determination(r^2) of the model.

r^2 = square of the correlation Coefficient

r^2 = 0.989^2 = 0.978121

Hence, about 0.978 (97.8%) of the variation in weight can be explained by the linear relationship between weight and chest size.

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To the nearest​ millimeter, a cell phone is 135 mm long and 51 mm wide. What is the ratio of the width to the​ length?
Inga [223]

Answer:

51:135

common factor is 3

51/3 = 17

135/3 = 45

17:45

7 0
3 years ago
Find the Mean Absolute Deviation.<br> (71, 80, 63, 91, 77, 85)
Finger [1]

Answer:

7.5

Step-by-step explanation:

3 0
3 years ago
Look at the pattern below.
Paladinen [302]

There will be 36 squares in the 8th step of the pattern

<h3>How to determine the number of squares?</h3>

The pattern and the squares are represented as:

<u>Pattern   Squares</u>

1                 1

2                3

3               6

4             10

This can be rewritten as:

<u>Pattern   Squares</u>

1                 1

2                1 + 2

3                1 + 2 +3

4                1 + 2 + 3 +4

So, the number of squares on the 8th pattern is:

8th pattern = 1 + 2 + 3 +4 + 5 + 6 + 7 + 8

Evaluate

8th pattern = 36

Hence, there will be 36 squares in the 8th step

Read more about patterns at:

brainly.com/question/7882626

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3 0
2 years ago
Newton uses two properties ti rewrite the expression (4x23)x25 identify the properties he used why would Newton use these proper
valentinak56 [21]

The two properties newton used to rewrite the <em>expression </em>are;

<u><em>- Associative Property; Because it involves change of grouping of numbers in the expression.</em></u>

<u><em>- Distributive Property; Because it involves distribution of a number outside a bracket to numbers inside that same bracket.</em></u>

  • This involves algebraic <em>properties</em>. There are 3 major types that work on only addition and multiplication namely;

- Associative Property

- Commutative Property

- Distributive Property

Let us define each of them;

1) Associative Property; This property in algebra is one that means that no

matter how we group the numbers, we will still get the same result. e.g.

x + (y + z) = (x + y) + z.

2) Commutative Property; This property means that we can change the

order of <em>operation</em> and still get the same answer. For example;

p × q × r = p × r × q

3) Distributive Property; This property means that multiplying the sum of

two or more which are in a bracket by a number outside the will be equal to

the answer gotten when we multiply each number in the bracket

individually by the number outside and then adding their respective

products together. For example; p(q + r) = (p * q) + (p * r)

Newton has the expression; (4 × 23) × 25

Since it is multiplication, he can use any of the three properties above but let us use the <em>associative and distributive properties </em> as they are most suited to this expression<em>.</em>

  • For the <em><u>associative property</u></em> as shown above, he will arrive at;

(4 × 23) × 25 = 4 × (23 × 25)

  • For the <u><em>distributive property</em></u> as shown above, he will arrive at;

(4 × 23) × 25 = (25 × 4) + (25 × 23)

Read more at; brainly.com/question/20724601

6 0
2 years ago
(7i)(7i)<br>help! please show steps​
exis [7]

Answer:

-49

Step-by-step explanation:

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i × i = i^2

49 × i^2 = 49i^2

i^2 = -1 ➡ 49 × (-1) = -49

7 0
3 years ago
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