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Natali5045456 [20]
3 years ago
7

What does X equal?? Help quick

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0
Correct Answer: x=17
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I don’t know how to do it, please teach me !!!
cricket20 [7]

As described in z-distribution the answers are given below:

a) The 95% confidence interval estimate for the population mean spending by a customer on visiting salon per month is given as follows: (747, 853).

b) The sampling error at 95% confidence level is of: $35.78.

What is a z-distribution ?

The normal distribution with a mean of 0 and a standard deviation of 1 is referred to as the standard normal distribution (also known as the Z distribution) (the green curves in the plots to the right). It is frequently referred to as the bell curve since the probability density graph resembles a bell.

solution:

The bounds of the confidence interval are given as follows:

In which:

is the sample mean.

z is the critical value.

n is the sample size. is the standard deviation for the population.

The parameters for this problem are given as follows:

Hence the lower bound of the interval is of:

800 - 200 x 1.96/square root of 55  = 747.

The upper bound of the interval is of:

800 + 200 x 1.96/square root of 55  = 853.

The sampling error for a sample size of 120 is calculated as follows:

200 x 1.96/square root of 120 = $35.78.

To learn more about the z-distribution from the given link

brainly.com/question/4079902

#SPJ1

5 0
1 year ago
4 team mates share 5 pizza show how much each person gets
Murrr4er [49]

Answer:

1  1/2

Step-by-step explanation:

Each person would equally get 1 pizza and the 1/2 of the last pizza

8 0
3 years ago
The formula for the circumference of a circle is C = 2r. What is one-fourth of the circumference of a circle that measures 12 ce
Harman [31]

The formula of a circumference is:

C=2\pi r

r - radius

or

C=d\pi

d - diameter

We have d = 12cm. Substitute:

C=12\pi\ cm

One-fourth of the circumference:

\dfrac{1}{4}C=\dfrac{1}{4}\cdot12\pi=3\pi\ cm\approx3\cdot3.14=9.42\ cm

<h3>Answer:  9.42 cm.</h3>
5 0
3 years ago
A certain stock gained 5 points in one day and lost 4 points the next day. Which situation has thegreater absolute value? Explai
erik [133]

Answer:

the first day has the greater absolute value

Step-by-step explanation:

if this helps can i get brainliest please

3 0
3 years ago
n ΔXYZ, m∠X = 90° and m∠Y = 30°. In ΔTUV, m∠U = 30° and m∠V = 60°. Which is true about the two triangles? ΔXYZ ≅ ΔTUV ΔXYZ ≅ ΔVU
lions [1.4K]
The triangles are similar because corresponding angles are congruent, however no congruency statement can be made because the side lengths are unknown.

The 4th selection is appropriate.
5 0
3 years ago
Read 2 more answers
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