I NEED HELP IN QUESTION 8<br> PLEASE !

What is the set of counting number less than 10?

zhuklara [117]

Counting numbers are whole integers starting from 1 and going to infinity. It doesn't include negative numbers or zero.

Therefore, the set would be:
{1, 2, 3, 4, 5, 6, 7, 8, 9}

5 0

4 years ago

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find the probability of having 2,3, or 4 successes in five trials of a binomial experiment in which the probability of success i

Nataly [62]

Let p be the probability of success, p = 0.4.

Pr[2 success] = nC2 * p^2 * (1-p)^3 = 0.346
Pr[3 success] = nC3 * p^3 * (1-p)^2 = 0.230
Pr[4 success] = nC4 * p^4 * (1-p)^1 = 0.077

So, the probability of getting 2, 3, or 4 success, would be 0.356 + 0.230 + 0.077 = 0.663, alternatively, 66.3%.

8 0

4 years ago

In a recent contest, the mean score was 210 and the standard deviation was 25. a) Find the z-score of John who scored 190 b) Fin

denpristay [2]

Answer:

a) $Z = -0.8$

b) $Z = 2.4$

c) Mary's score was 241.25.

Step-by-step explanation:

Problems of normally distributed samples can be 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. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 210, \sigma = 25$

a) Find the z-score of John who scored 190

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

$Z = \frac{190 - 210}{25}$

$Z = -0.8$

b) Find the z-score of Bill who scored 270

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

$Z = \frac{270 - 210}{25}$

$Z = 2.4$

c) If Mary had a score of 1.25, what was Mary’s score?

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

$1.25 = \frac{X - 210}{25}$

$X - 210 = 25*1.25$

$X = 241.25$

Mary's score was 241.25.

3 0

3 years ago

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Who can access your credit report? a. Friends b. Employers c. Neighbors d. Teachers.

Monica [59]

Employers can use your credit report for the purpose of getting information. Then the correct option is B.

<h3>What is decision-making?</h3>

The process of making choice is by identifying the correct decision, gathering information, and assessing alternative solutions.

Employers can access your credit score or report. However, depending on the state you live in, it may be able to pull a credit score, or at least a modified version. The pulled score by your employer likely will not include your number or date of birth, but it does not pose a security risk for you.

a. Friends - They can not use your credit report.

b. Employers - They can use your credit report.

c. Neighbors - They can not use your credit report.

d. Teachers - They can not use your credit report.

More about the decision-making link is given below.

brainly.com/question/3369578

7 0

2 years ago

Can someone help me with this I dont understand

Nezavi [6.7K]

<h3>How to identify the source and range of the signal?</h3>

Remember that a circle of radius R, centered at the point (a, b) is described by the equation: