PLS HELP ITS DUE AT 11:10

igor_vitrenko [27]

-18 is an integer
also, a rational number and a real number.

3 0

4 years ago

This has to do with mean,median,mode, and all that stuff, but my teacher is like,not really good at explaining stuff lol

Flura [38]

The average of 6 quiz scores, where $x$ is the score of the last quiz, is

$\dfrac{83+81+89+92+80+x}6=\dfrac{425+x}6$

The student needs a minimum average of 86 to earn an A:

$\dfrac{425+x}6=86\implies425+x=516\implies x=91$

so the student needs a score of 91.

5 0

3 years ago

A large restaurant is being sued for age discrimination because 15% of newly hired candidates are between the ages of 30 years a

lesya [120]

Answer:

Part A:

The null and alternative hypothesis are:

$H_0: \pi=0.5\\\\H_1: \pi\neq 0.5$

Part B:

- A Type I error is when the null hypothesis is rejected although it is true. In this case, it would mean that we conclude that the hiring process is discriminatory, when in reality it is a random result and the process is not discriminatory.

- A Type II error is when the null hypothesis fails to be rejected although it is false. In this case, the hiring process is discriminatory, but statistically the result is not significant enough to prove that.

Part C:

A reduction in the significance level causes a reduction in the power of the test.

Part D:

The power of the test is increased with a larger sample.

Step-by-step explanation:

We have a restaurant with hire a proprotion of 15 % of people in the age ragne of 30-50 years. The expected proportion, according to the applicants, is 50%.

The test will tell us if the actual 15% is a result of a discriminatory practice or a random result.

Part A:

The null and alternative hypothesis are:

$H_0: \pi=0.5\\\\H_1: \pi\neq 0.5$

Part B:

- A Type I error is when the null hypothesis is rejected although it is true. In this case, it would mean that we conclude that the hiring process is discriminatory, when in reality it is a random result and the process is not discriminatory.

- A Type II error is when the null hypothesis fails to be rejected although it is false. In this case, the hiring process is discriminatory, but statistically the result is not significant enough to prove that.

Part C:

The power of an hypothesis test is the probability that the test rejects the null hypothesis (H_0) when a specific alternative hypothesis (H_1) is true.

If the significance level is reduced (from 5% to 1%), the rejection region is reduced, so the probability of rejecting the null hypothesis is also reduced.

Then, a reduction in the significance level causes a reduction in the power of the test.

Part D:

A bigger sample size gives robustness to the sample statistic. Then, if the alternative hypothesis is true, the probabilities of detecting the effect are increased with increased sample size.

Then, the power of the test is increased with a larger sample.

3 0

3 years ago

What is the measure of this angle?<br> A) 44° <br> B) 56° <br> C) 136° <br> D) 144°

allsm [11]

A) 44 degrees just look at the degree the line segment lands on in the protractor

4 0

4 years ago

Read 2 more answers

the point slope form of the equation of a line that passes through (8,4) and (0,2) is y-4=1/4(×-8) what is the slope intercept f

marissa [1.9K]

Answer: