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Vedmedyk [2.9K]
2 years ago
12

Assume that the mean length of a human pregnancy is 269 days. If​ 95% of all human pregnancies last between 249 and 289 ​days, w

hat is the standard deviation of the distribution of lengths of human​ pregnancies? What percent of human pregnancies are expected to last at least 287 ​days?
Mathematics
1 answer:
o-na [289]2 years ago
7 0

Answer:93% not sure

Step-by-step explanation:

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Look at the picture
ValentinkaMS [17]

Answer: 54

Step-by-step explanation:

3 times the square of -3 plus -5 times -3 plus 12

3 times 9 + 15 + 12

27+15+12=

54

7 0
3 years ago
suppose you write an equation that gives "a" as a function of "b". Which is the dependent variable and which is the independent
blondinia [14]
If im not wrong which i may not the
Dependent is A
Independent is B
4 0
3 years ago
Read 2 more answers
Choose the equation which represents the information in the table.
miv72 [106K]
B) y = -2x

when x = a

y = -2a

when x= 2a

y = -2(2a) = -4a

6 0
3 years ago
Read 2 more answers
You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your d
Trava [24]

Answer:

Following are the solution to this question:

Step-by-step explanation:

For this set, the correlation coefficient is = -0.015.

It shows that financial variables have trust issues. Once a price rises, the other one is decreasing the value of -0,015 shows, that there are several fewer associations in the set of data among x and y and between y values. This interaction also can range between -1 to 1, to 0 being completely unrelated. But you'd never be sure, in this situation, 0.015 is very similar to 0.

It means that your prediction is nothing better than just a wild choice. Its odds of an estimated value being relatively close to the actual result are therefore much smaller as the points are it's hardly the best match.

4 0
2 years ago
Please help i really need an A and i'm horrible at math ):
Dovator [93]

See the attached picture for 2 options for question 1 and 2 depending on how the fractions are written.


Question #3:

17 = -13 - 8x

Add 13 to each side:

30 = -8x

Divide both sides by -8:

X = 30 / -8

X = -3 3/4

4 0
3 years ago
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