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Flura [38]
3 years ago
10

Determine the area under the standard normal curve that lies to the left of ​(a) z equals negative 1.53 commaz=−1.53, ​(b) z equ

als negative 1.51z=−1.51​, ​(c) z equals negative 0.87z=−0.87​, and​ (d) z equals negative 0.63z=−0.63. ​(a) The area to the left of zequals=negative 1.53−1.53 is nothing. ​(Round to four decimal places as​ needed.)

Mathematics
1 answer:
Svetach [21]3 years ago
8 0

Answer:

(a) z = -1.53 --> P(x<z) = 0.0630

(b) z = -1.151 --> P(x<z) = 0,0655

(c) z = -0.63 --> P(x<z) = 0,2643

Step-by-step explanation:

To know the area that lies to the left, equal to P(x<z), the best way is to look at tables of standard normal curve.

(a) z = -1.53 --> P(x<z) = 0.0630

(b) z = -1.151 --> P(x<z) = 0,0655

(c) z = -0.63 --> P(x<z) = 0,2643

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Step-by-step explanation:

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A sign 4 meters tall cast a shadow 5 meters long . At the same time, a tree casts a shadow 30 meters long. What is the height of
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The information's given in the question are of vital importance. These information's should be very useful while getting to the desired answer of the given question.Let us now concentrate on the problem that needs to be solved.
The height of the sign that casts a shadow of 4 meters is = 5 meters
Then
The height of the tree that casts a shadow of 30 meters = (5/4) * 30 meters
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Step-by-step explanation:

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2 years ago
Answer the question for a normal random variable x with mean μ and standard deviation σ specified below. (Round your answer to o
vladimir2022 [97]

Answer:

x = 63.6

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X and also the area to its left. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X, which is the area to its right.

In this problem, we have that:

\mu = 38, \sigma = 11

Find a value of x that has area 0.01 to its right

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X - 38 = 11*2.3267

X = 63.6

So x = 63.6

6 0
3 years ago
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