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3 years ago

Which of the following statements are true? Select all that apply.

2 answers:

8 0

<span>The correlation coefficient is a value that signifies correlation and dependence between two or more values. </span>The following statements are true:
- The correlation coefficient is a unitless number and must always lie between –1.0 and +1.0, inclusive.
- The correlation coefficient, r, gives us information about the strength and direction of a linear relationship between any two variables.
<span>- The larger r is in absolute value, the stronger the relationship is between the two variables.
</span>

Troyanec [42]3 years ago

6 0

<h2>Answer:</h2>

The correct statements are as follows:

Correlation coefficients are used to measure the strength, like weaker or stronger relationship between two variables.

The correlation coefficient is a unit less number and must always lie between –1.0 and +1.0, inclusive.

The correlation coefficient, r , gives us information about the strength and direction of a linear relationship between any two variables. We can say that r > 0 is a positive correlation and r < 0 is negative. |r| closer to 1 is a stronger correlation.

The larger r is in absolute value, the stronger the relationship is between the two variables.

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To solve: Let's solve your equation step-by-step.

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Step 1: Simplify both sides of the equation.

4x2+4x=2004

Step 2: Subtract 2004 from both sides.

4x2+4x−2004=2004−2004

4x2+4x−2004=0

Step 3: Use quadratic formula with a=4, b=4, c=-2004.

x= −b±√b2−4ac /2a

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3 years ago

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3 years ago

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3 years ago

At the start of the year a summer holiday to Spain cost £650. It increased by 11% in

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Answer:

Final cost = £779

Step-by-step explanation:

It is given that:

Cost of summer holiday = £650

Amount increased by 11%

Increased cost = 11% of 650

Increased cost = $\frac{11}{100}*650$

Increased cost = 0.11 * 650 = £71.50

Amount after increment = 650 + 71.50 = £721.50

Further increase = 8%

Amount = 0.08 * 721.50 = £57.72

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Thus,

Final cost = £779

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