Whats the answerI have sent a photo im not sure if u can see it

Mathematics

2 answers:

goblinko [34]3 years ago

4 0

Answer:

That would be (-5,5)

Step-by-step explanation:

Unless I saw the photo wrong, you start at the coordinates (-3,-1). You move left 2 units to get to (-5,-1). Then you move 6 units up. That will get you to (-5,5).

I hope this helps! All credit should go to tjclrk1; I had to edit

aleksandrvk [35]3 years ago

3 0

<em>Hey mate!!!!! yes we can see the picture but what do you want us to do for you??</em>

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A signal in a communication channel is detected when the voltage is higher than 1.5 volts in absolute value. Assume that the vol

saw5 [17]

Answer:

The standard deviation of the voltage is $\sigma = 0.91$

Step-by-step explanation:

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

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

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. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

The problem states that

Assume that the voltage is normally distributed with a mean of 0, so $\mu = 0$

A signal in a communication channel is detected when the voltage is higher than 1.5 volts in absolute value. What is the standard deviation of voltage such that the probability of a false signal is 0.05?

We know that $P(X>1.5) = 0.05$ . This means that when $X = 1.5$ the zscore has a pvalue of 0.95. Looking at the zscore table, we have that $Z = 1.65$ . So