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Savatey [412]
2 years ago
6

Help me please just give the correct answer!

Mathematics
1 answer:
belka [17]2 years ago
4 0
I’m pretty sure it’s 12
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A university surveyed recent graduates of the English department about their starting salaries. Four hundred graduates returned
Dafna1 [17]

Answer:   (24755, 25245)

Step-by-step explanation:

Given : Sample size : n= 400

Sample mean : \overline{x}= \$25,000

Standard deviation : \sigma=\$2,500

Significance level : \alpha: 1-0.95=0.05

Critical value : z_{\alpha/2}=1.96

The confidence interval for population mean is given by :-

\overline{x}\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=25000\pm(1.96)\dfrac{2500}{\sqrt{400}}\\\\=25000\pm245\\\\=(25000-245,\ 25000+245)=(24755,\ 25245)

Hence, the 95% confidence interval for the mean salary of all graduates from the English department is (24755, 25245)

8 0
3 years ago
Troy is building a rectangular garden that is 10 feet by 6 feet.What should be the length of the diagonals to ensure a 90 degree
mina [271]
6^2 + 10^2 equals 11.67
3 0
3 years ago
Read 2 more answers
A wooden beam 24 feet long leans against a wall and makes an angle of 71° with the ground. How high up the wall does the beam re
qaws [65]
20 is the right answer because it loses 2 feet in the angle and goes two ffet back cause the angle 


4 0
3 years ago
According to a soccer coach, 75% of soccer players have had at least one sprained ankle. An athletic trainer would like to inves
Greeley [361]

Answer:

H0 : μ = 0.75

H1 : μ > 0.75

Step-by-step explanation:

Given :

Sample size, n = 125

x = 99

Phat = x / n = 99 / 125 = 0.792

Population proportion, P = 0.75

The hypothesis :

Null hypothesis :

H0 : μ = 0.75

Alternative hypothesis ;

Egates the null hypothesis ; since the sample proportion is greater than the the population proportion or claim "; then we use the greater than sign.

H1 : μ > 0.75

5 0
2 years ago
Write this percentage as a fraction in its simplest form.<br> 20%
Kobotan [32]

Answer:

it is 1/5

Step-by-step explanation:

.............

7 0
2 years ago
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