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3 years ago

Help please?

2 answers:

5 0

The r value is r = -0.015 which is much closer to 0 than it is to -1, so this means that the linear regression line is a bad model to estimate the points. You're better off using some other model (eg: quadratic model), or it's possible that the data isn't connected at all and it's random noise.

If r were closer to -1, then we'd be more confident that the lines all fall around the same straight line that slopes downward.

postnew [5]3 years ago

5 0

Answer:

Step-by-step explanation:

Correlation coefficient r always lying between -1 and +1 represents the strength of linear association between two variables.

When it is 0 there is no correlation, and negative sign represents negative association while positive sign represents positive association.

The nearer the value of correlation coefficient to -1 or +1 there is a strong association.

Here r = -0.015

correlation coefficient is almost equal to 0 representing the nil association between x and y.

Since there is practically no linear association the regression equation in linear form will be irrelevant. And hence we cannot be confident about the predicted value will be reasonably close to the actual value

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Suppose that two cards are randomly selected from a standard 52-card deck. (a) what is the probability that the first card is

Nutka1998 [239]

There are 13 clubs in a standard 52 card deck. The first time you draw a club the odds of doing it are
13/52 = 1/4
The second time you draw a club, the number of clubs have gone down by 1 and the number of cards in the deck have also gone down by 1.

So this time the odds are12/51

The probability of both happening, one after the other without replacement is
1/4 * 12/51 = (1*12)/(4*51) = 12/204 = 3/51 = 1/17

1/17 = 0.0588

8 0

4 years ago

P = $14,300 r = 7 % t = 4 What is i? $4.29 $429.00 $4,290.00

Julli [10]

Answer:

4,290 I believe

Step-by-step explanation:

5 0

3 years ago

Ashley recently opened a store that uses only natural ingredients. She wants to advertise her products by distributing bags of s

Elenna [48]

I will rewrite the question for better understanding:

Ashley recently opened a store that uses only natural ingredients. She wants to advertise her products by distributing bags of samples in her neighborhood. It takes Ashley 2/3 of a minute to prepare one bag. It takes each of her friends 75% longer to prepare a bag. How many hours will it take Ashley and 4 of her friends to prepare 1575 bags of samples?

Answer:

5.3 hours

Explanation:

1) Time it takes Ashley to preprate one bag:

2/3 min

2) Time it takes each friend of Ashley: 75% more than 2/3 min

75% × 2/3 min = 0.75 × 2/3 min = 3/4 × 2/3 min= 2/4 min = 1/2 min = 0.5 min

2/3 min + 1/2 min = 7/6 min

3) Time it takes Ashley and the 4 friends working along to prepare one bag:

Convert each time into a rate, since you can set that the total rate of Ashley along with her four friends is equal to the sum of each rate:

Rate of Ashley: 1 bag / (2/3) min = 3/2 bag/min

Rate of each friend: 1 bag / (7/6) min = 6/7 bag/min

Rate of Ashley and 4 friends = 3/2 bag/min + 4 × 6/7 bag/min = (3/2 +24/7) bag/min = 69/14 bag/min

4) Time of prepare 1575 bags of samples:

time = number of bags / number of bags per min = 1,575 bags / (69/14) bags/min = 319.56 min

5) Convert minutes to hours:

356.56 min × 1 hour / 60 min = 5.3 hours

3 0

3 years ago

Please help. Geometry!

raketka [301]

Answer:

21.5

Step-by-step explanation:

→_→

It did not say if if it was a acute triangle or a obtuse triangle

5 0

3 years ago

What is the slope intercept equation of slope =2\3 y-intercept = 7

Inessa05 [86]

Steps:
1. Slope intercept formula=
Y=mx+ b
2. M= slope b= y-intercept
3. Now do substitution
4. Your answer is
Y=2/3x + 7

7 0

3 years ago