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tia_tia [17]
3 years ago
13

9. In a school, there are 120 students in a particular year group. Out of those students, 100 study

Mathematics
1 answer:
Tresset [83]3 years ago
6 0
This does not make any sense I don’t know how to help you out sorry
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The standard deviation for actuary salaries has a standard deviation of $36,730 . You collect a simple random sample of n=36 sal
Yanka [14]

Using the z-distribution, it is found that the lower limit of the 95% confidence interval is of $99,002.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

The other parameters are given as follows:

\overline{x} = 111000, \sigma = 36730, n = 36

Hence, the lower bound of the interval is:

\overline{x} - z\frac{\sigma}{\sqrt{n}} = 111000 - 1.96\frac{36730}{\sqrt{36}} = 99002

The lower limit of the 95% confidence interval is of $99,002.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

8 0
2 years ago
If 5 of 22 students are hearing impaired - what fraction of students are hearing impaired
Shtirlitz [24]
5/22 the number you get from the total becomes the numerator and the total amount becomes the denominator
7 0
3 years ago
benny sold half of his comic books and then bought 6 more. he now has 14. how many did he begin with?
Nostrana [21]

Answer:

Benny started off with 16 comic books.

Step-by-step explanation:

x/2 + 6 = 14

solve

x/2 + 6 = 14

<u>       -6     -6</u>

x/2 = 8

multiply by 2

x = 16

<em><u>Hope this helped! Have a nice day! Plz mark as brainliest!!!</u></em>

<em><u>-XxDeathshotxX</u></em>

3 0
3 years ago
Read 2 more answers
ILL GIVE BRAINLIEST ! <br>What can FOIL be used for?​
Tomtit [17]

Answer:

I can be used for thermal conductivity, Electrical conductivey, fake grills for teeth lol, ac conducters, and more

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What are two factors of the composite number 46 other than 1 and 46?A.3 and 7B.2 and 13C.2 and 23D.3 and 33
otez555 [7]
Finding factors is kind of a guessing game, if you have choices to pick from you can divide the number by the possible factor and if it turns out to be a whole number then that possible factor is a factor. let me show you

46/3=15.3 so three is not the answer
46/2=23 so, 2 is a factor

the possible answers you have look weird, i am not sure what 7B.3, 13c.2, or 23D.3 means but I hope I helped

3 0
3 years ago
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