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3 years ago

Find the z value such that 39% of the standard normal curve lies between −z and z.

Mathematics

2 answers:

zavuch27 [327]3 years ago

3 0

Use symmetry and find z so that probability is:
(100-39)/2
=61%
=30.5%~0.305
From the z-table:
z=-0.51
Answer: -0.51

zaharov [31]3 years ago

3 0

Answer:

Value of Z =0.51

Step-by-step explanation:

Given that P(-z<0<z) = 0.39

Or P(0<z) = 0.39/2 = 0.195

From standard normal table we find that

0.51 satisfies that

P(0<z<0.51) = 0.195

Hence value of z = 0.51

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Which is true about the solution to the system of inequalities shown? y > 3x + 1 y < 3x – 3 On a coordinate plane, 2 solid

Novay_Z [31]

The true option about the solution to the system of inequalities shown is B. The second line has a positive slope and goes through (0, negative 3) and (1, 0).

<h3>How to explain the inequality?</h3>

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2 years ago

A line passes through the points (7, 10) and (7, 20). Which statement is true about the line? It has a slope of zero because x 2

yaroslaw [1]

Answer:

It has no slope because x 2 minus x 1 in the formula m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction is zero, and the denominator of a fraction cannot be zero.

Step-by-step explanation:

Points:

(7, 10) and (7, 20)

Slope-intercept form:

y= mx+b

slope is:

m= (y2-y1)/(x2-x1)= (20-10)/(7-7)= 10/0,

denominator of the fraction is zero, we can't divide by zero, so this line has no slope

----------

It has a slope of zero because x 2 minus x 1 in the formula m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction is zero, and the numerator of a fraction cannot be zero.

no, numerator is not zero

It has a slope of zero because x 2 minus x 1 in the formula m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction is zero, and the denominator of a fraction cannot be zero.

no, it has no slope

It has no slope because x 2 minus x 1 in the formula m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction is zero, and the numerator of a fraction cannot be zero.

no, numerator is not zero

It has no slope because x 2 minus x 1 in the formula m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction is zero, and the denominator of a fraction cannot be zero.

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4 years ago

Read 2 more answers

May I have help to figure out how to do this? It is confusing! :(

RSB [31]

Answer:

it should be 80%

Step-by-step explanation:

I hope this helps

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3 years ago

Read paid 2 dollars proposed during 20 cents per filter to prayer, if x represents the number of filters handed out the grocery

andre [41]

It would be 10 as the answer.

8 0

4 years ago

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otez555 [7]

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Choice 1) I choose the first 2 points from table
$(3,6.3),(4,8.4)= \frac{8.4-6.3}{4-3}= \frac{2.1}{1}$ which is greater than A and not the correct answer

Choice 2) I choose the first 2 points from table
$(3,2.25),(6,4.5)= \frac{4.5-2.25}{6-3} = \frac{2.25}{3}= 0.75$
which is less than A and the correct answer

Choice 3) I choose the first 2 points from table
$(3,5.4),(4,7.2)= \frac{7.2-5.4}{4-3} = \frac{1.8}{1}$ which is greater than A and not the correct answer

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3 years ago