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Rufina [12.5K]
3 years ago
11

A traffic officer is compiling information about the relationship between the hour or the day and the speed over the limit at wh

ich the motorist is ticketed. He computes a correlation coefficient of 0.12. What does this tell the officer?
Mathematics
1 answer:
SpyIntel [72]3 years ago
3 0

Answer:

The correlation between hour of the day and the speed over the limit at which the motorist is ticketed is weak positive correlation.

Step-by-step explanation:

The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent).It ranges from -1 to +1.

The types of correlation coefficient are:

  • +1 (-1) : Perfect positive (negative) correlation
  • 0 to 0.30(-0.30) : Weak positive (negative) correlation
  • 0.30(-0.30) to 0.70(-0.70) : Moderate positive (negative) correlation
  • 0.70(-0.70) to 1 (-1) :  Strong positive (negative) correlation

The correlation coefficient value between the hour of the day and the speed over the limit at which the motorist is ticketed is:

<em>r</em> = 0.12.

The value of <em>r</em> lies between:

0 < 0.12 < 0.30

Thus, the correlation between hour of the day and the speed over the limit at which the motorist is ticketed is weak positive correlation.

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denpristay [2]

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3 0
3 years ago
Which of the following equations is equivalent to 2/3x - 1/2y = 6?
Nostrana [21]

Answer:

4x - 3y = 36

Step-by-step explanation:

2/3x - 1/2y = 6

Multiply each side by 6 to get rid of the fractions

6*  (2/3x - 1/2y) = 6*6

Distribute the 6

12/3 x - 6/2y = 36

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4 0
3 years ago
Kevin and Randy Muise have a jar containing 70 coins, all of which are either quarters or nickels. The total value of the coins
Nikitich [7]

Answer:

50 nickels, 20 quarters.

Step-by-step explanation:

System of equations (q = # of quarters, n = # of nickels):

<em>q + n = 70, 0.25q + 0.05n = 7.50</em>

the first equation can be changed to q = 70 - n, so we are able to <em>substitute q with 70 - n</em>.

So, it will look like <em>0.25*70 - 0.25n + 0.05n = 7.50</em>. This can be simplified to <em>0.2n = 10</em>, which means that n = 50.

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6 0
3 years ago
Which expression is equivalent to - 32 ^ (3/5)
hjlf

The answer is -8

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user100 [1]

Answer:

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Step-by-step explanation:

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3 years ago
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