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3 years ago

"What is the approximate area of the shaded region under the following standard normal curve?

Mathematics

2 answers:

Vesnalui [34]3 years ago

5 0

For the standard normal distribution, the shaded region is between:
(The mean ( Mi ) - 2 standard deviations( Sigma )) and (the mean (Mi)+ 2 standard deviations( Sigma)).
It is : 34 % · 2 + 13.6 % · 2 = 95.2 % ≈ 0.95
Answer: D ) 0.95

Tems11 [23]3 years ago

3 0

Answer:

0.68

Step-by-step explanation:

because thats how it be sometimes

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Find Z.............

Arada [10]

Answer:

x = 40 degrees

Step-by-step explanation:

We are given that AB and CD are parallel to each other and they are cut by a transversal.

The angle 40 is complementary to angle z, so this means that they have the same measure by the complementary angles theorem.

Complementary are angles that occupy the same space on one parallel line compared to the other parallel line.

Angle z = 40 degrees

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3 years ago

A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at th

OlgaM077 [116]

Answer:

Interval [16.34 , 21.43]

Step-by-step explanation:

First step. <u>Calculate the mean</u>

$\bar X=\frac{(23+18+23+12+13+23)}{6}=18.666$

Second step. <u>Calculate the standard deviation</u>

$\sigma =\sqrt{\frac{(23-18.666)^2+(18-18.666)^2+(23-18.666)^2+(12-18.666)^2+(13-18.666)^2+(23-18.666)^2}{6}}$

$\sigma=\sqrt\frac{18.783+0.443+18.783+44.435+5.666+18.783}{6}$

$\sigma=\sqrt{17.815}=4.22$

As the number of data is less than 30, we must use the t-table to find the interval of confidence.

We have 6 observations, our level of confidence DF is then 6-1=5 and we want our area A to be 80% (0.08).

We must then choose t = 1.476 (see attachment)

Now, we use the formula that gives us the end points of the required interval

$\bar X \pm t\frac{\sigma}{\sqrt n}$

where n is the number of observations.

The extremes of the interval are then, rounded to the nearest hundreth, 16.34 and 21.43

6 0

3 years ago

Select each figure that appears to be a rectangle. You must select all that apply.

Archy [21]

Answer:

Step-by-step explanation:

i Believe its A. B. And D. But i could be wrong

4 0

2 years ago

Read 2 more answers

Please help a step by step would be nice answer is also ok

nasty-shy [4]

I would choose A I’m not to sure tho

6 0

3 years ago

Simplify (5n^4)^-3. Assume n = 0.

denpristay [2]

Answer:

Step-by-step explanation:

5*0=0

0^4=0

0^-3=0

8 0

2 years ago

Read 2 more answers