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Mkey [24]
3 years ago
13

A scatter plot is shown. Which statement is true for the scatter plot?

Mathematics
1 answer:
sergey [27]3 years ago
5 0
We need the multi choices to answer that
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Income tax returns show that the mean income of self-employed persons in a particular year was £15,000, with a standard deviatio
DochEvi [55]

Answer:

Yes, There is significant difference.

Step-by-step explanation:

Null Hypothesis , H0 : Mean income = 15000

Alternate Hypothesis , H1 : Mean income  ≠  15000

t = (x - u) / ( s / √n)

x = sample mean = 14500 here, u = population mean = 15000 here ,             s = standard deviation =  975 here  , n = sample size

t = (14500 - 15000) / (975 / √169)

-500 / 75 = - 6.66

As  calculated t value in absolute terms is > 1.96 , ie tabulated value at 95% significance level (two sided). So we reject the null hypothesis in favor of alternate hypothesis. Hence, we state that 'Mean Income ≠  15000'

6 0
3 years ago
The answer to the question below is 8/15 right?
ioda
When you have something like this, to simplify the exponent you multiply them together, so the exponent is 1/3 x 1/5. 
1/3 x 1/5 is 1/15, so the simplified expression is: 
m^{ \frac{1}{15} } 
Hope this helps!
3 0
3 years ago
Read 2 more answers
A finance magazine did a survey and found that the average American family spends $1,600 on a summer vacation. If the distributi
Andre45 [30]

Answer:

<h2> $1945</h2>

Step-by-step explanation:

Let X be the normal distribution

Kindly find attached a detailed annotation of the solution to the problem.

in the attached document, we found the value that corresponds to  80th percentile, hence we found the value such that the probability that the variable x is lower than this value is 0.8.

Also, from the calculation, we found that the value which corresponds to the 80th percentile is $1945

6 0
3 years ago
Unit cube:
Nutka1998 [239]

Answer:

12 unit cubes

Step-by-step explanation:

There are 4 unit cubes on each layer, and there are 3 layers as you can see. So 4 × 3 would equal 12.

8 0
3 years ago
4 green marbles, 5 red marbles, and 2 yellow marbles are placed into a bag. One marble is chosen and replaced into the bag. A se
Ipatiy [6.2K]

Answer:

The probability is 10/121

Step-by-step explanation:

In this question, we are tasked with calculating probability.

The probability to be calculated is that we have an ordered selection of picking a red marble after which we pick a yellow marble.

Firstly let us know the total number of marbles we have. That will be 4 + 5 + 2 = 11 marbles

Probability of picking a red marble will be 5/11 while the probability of picking a yellow marble will be 2/11

Now, the probability of picking a red marble before a yellow marble will be mathematically equal to; P(r) * P(y) = 5/11 * 2/11 = 10/121

7 0
3 years ago
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