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bearhunter [10]
2 years ago
13

The heights of all the newborns in a certain country are normally distributed,

Mathematics
1 answer:
viva [34]2 years ago
3 0

Answer:

c

Step-by-step explanation:

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3(x + 1) = -2 (x - 1) -4
AlekseyPX

Answer:

x = -1

Step-by-step explanation:

use distribution

3x + 3 = -2x + 2 - 4

simplify

3x + 3 = -2x - 2

combine like terms

3x + 3 = -2x - 2

-3x                -3x

3 = -5x - 2

+2         +2

5 = -5x

/-5     /-5

-1 = x

7 0
3 years ago
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In a 3M Privacy Filters poll, 806 adults were asked to identify their favorite seat when they fly, and 492 of them chose a windo
Snowcat [4.5K]

Answer:

Step-by-step explanation:

If majority of adults prefer a window seat when they fly, it means that more than half or more than 0.5 of the population prefer a window seat when they fly.

We would set up the hypothesis test.

For the null hypothesis,

p = 0.45

For the alternative hypothesis,

p > 0.5

Considering the population proportion, probability of success, p = 0.5

q = probability of failure = 1 - p

q = 1 - 0.5 = 0.5

Considering the sample,

Sample proportion, P = x/n

Where

x = number of success = 492

n = number of samples = 806

P = 492/806 = 0.61

We would determine the test statistic which is the z score

z = (P - p)/√pq/n

z = (0.61 - 0.5)/√(0.5 × 0.5)/806 = 6.24

From the normal distribution table, the p value < 0.00001

Since alpha, 0.01 < than the p value, then we would reject the null hypothesis. Therefore, at a 1% significance level, we can conclude that the majority of adults prefer a window seat when they fly.

8 0
3 years ago
Which inequality is represented by this graph?
Cerrena [4.2K]
The correct answer is is the option B . X>0


Hopefully this help you
3 0
3 years ago
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A group of students must collect at least $120 to organize a science fair. They have already collected $30. Which graph best rep
Bezzdna [24]
Number line graph with closed circle on 30 and shading to the right
because you already have 30 dollars and they need at least 120 but if they get more then 120 they can still hold the science fair.
8 0
3 years ago
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Molly walked 3.45 miles on a hike. her sister walked 1.23 miles. her brother walked 0.85 miles. how much farther did molly walk
Oxana [17]
The answer is B......
5 0
3 years ago
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