Students and faculty alike are concerned about the cost of textbooks. A committee of both students and faculty searched the internet for appropriate books that would be available for less than $60. A random sample of 40 texts gave a mean of $65.12 with a standard deviation of $23.08. At the 5% level of significance, do the texts selected in the sample cost significantly more than the amount the committee considered appropriate?

(1) List all the information necessary for conducting the hypothesis test and state which

test you are doing.

(2) State the null and alternative hypotheses and whether you would use a right-tailed

test, a left-tailed test, or a two-tailed test.

(3) Sketch the critical reason, indicating on the sketch what the critical value(s) are.

(4) Determine the calculated z or t.

(6) Decide if you will Reject or Fail to Reject the Null Hypothesis.

(7) Interpret your conclusion in terms of the problem.

(8) If there are any questions to be answered in the problem, do so.

. Kyle believed that his employer Billing RUs is violating state and federal law by not reporting income properly. He registered an anonymous complaint with the IRS who promptly initiated an audit. Following the conclusion of the audit, about six months after his complaint, Kyle is terminated by Billing RUs allegedly for performance issues. While his employer never questioned him about the complaint, Kyle believes that his termination decision was retaliatory for his complaint to the IRS. Assess Kyle ‘s claims and the potential defenses. 2. Karen and Greg are good friends at the law firm where they work. Greg works as an associate for Karen, a partner. After some time, they develop a relationship at work. Although they try to keep it secret, the existence of the relationship is pretty evident to coworkers due to the fact that they come to work together and leave at the same time. Plus, unbeknownst to Karen and Greg, their blackberry texts are regularly monitored by head partner, including pictures sent to each other. If you were in HR for the law firm and asked to advise what, if anything, to do about Karen and Greg, what would you advise? What, if any, are the problems posed by Karen and Greg’s relationship? 3. Doug works at an auto repair shop. The auto mechanics regularly use foul language, and many of them regularly call Doug, a mechanic, “gay” or a “faggot.” Doug is offended by this behavior and reports it to Bob, the supervisor. Bob says that there is nothing that he can do about it. Does Doug have a claim under federal law? Explain why or why not.

Consider the following scenario:

The senior systems analyst has tasked you to conduct a briefing on the different types of firewalls. In this briefing, you must show a diagram of where on the LAN the firewalls are placed on the network.

Utilize the following guidelines to create your PowerPoint presentation:

• One slide will consist of a LAN diagram of the location of a firewall.
• The other three slides should describe the types of firewalls.
• Utilize the Notes section of the slides to explain phases and additional information (this is required).

Your completed PowerPoint presentation should be six slides in length, which includes your title and reference slides. You should present your text in bulleted lists and add additional information in your notes section of the slides. Include at least two sources in your assignment. All sources used must be referenced; paraphrased and quoted material must have accompanying citations and be cited per APA guidelines. Make sure you format your presentation according to APA style.

The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below.

Use a 5% level of significance to test the claim that the age distribution of the general Canadian population fits the age distribution of the residents of Red Lake Village.

(a) What is the level of significance?


State the null and alternate hypotheses.

H₀: The distributions are the same.
H₁: The distributions are different.

H₀: The distributions are different.
H₁: The distributions are different.    

H₀: The distributions are the same.
H₁: The distributions are the same.

H₀: The distributions are different.
H₁: The distributions are the same.

(b) Find the value of the chi-square statistic for the sample. (Round your answer to three decimal places.)


Are all the expected frequencies greater than 5?

Yes

No    

What sampling distribution will you use?

Student's t

uniform    

binomial

normal

chi-square

What are the degrees of freedom?


(c) Find or estimate the P-value of the sample test statistic. (Round your answer to four decimal places.)


(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis that the population fits the specified distribution of categories?

Since the P-value > α, we fail to reject the null hypothesis.

Since the P-value > α, we reject the null hypothesis.    

Since the P-value ≤ α, we reject the null hypothesis.

Since the P-value ≤ α, we fail to reject the null hypothesis.

(e) Interpret your conclusion in the context of the application.

At the 5% level of significance, the evidence is insufficient to conclude that the village population does not fit the general Canadian population.

At the 5% level of significance, the evidence is sufficient to conclude that the village population does not fit the general Canadian population.

The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below.

Use a 5% level of significance to test the claim that the age distribution of the general Canadian population fits the age distribution of the residents of Red Lake Village.

(a) What is the level of significance?


State the null and alternate hypotheses.

H₀: The distributions are the same.
H₁: The distributions are different

H₀: The distributions are different.
H₁: The distributions are the same.    

H₀: The distributions are different.
H₁: The distributions are different.

H₀: The distributions are the same.
H₁: The distributions are the same.

(b) Find the value of the chi-square statistic for the sample. (Round your answer to three decimal places.)


Are all the expected frequencies greater than 5?

Yes

No

What sampling distribution will you use?

normal

uniform

chi-square

Student's t binomial

What are the degrees of freedom?


(c) Find or estimate the P-value of the sample test statistic. (Round your answer to four decimal places.)


(d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis that the population fits the specified distribution of categories?

Since the P-value > α, we fail to reject the null hypothesis.

Since the P-value > α, we reject the null hypothesis.  

Since the P-value ≤ α, we reject the null hypothesis.

Since the P-value ≤ α, we fail to reject the null hypothesis.

(e) Interpret your conclusion in the context of the application.

At the 5% level of significance, the evidence is insufficient to conclude that the village population does not fit the general Canadian population.

At the 5% level of significance, the evidence is sufficient to conclude that the village population does not fit the general Canadian population.

1) a proportion of shoreline student who love pineapple on pizza who are from Asia p hat=17/47=0.362

2) a proportion of shoreline student who love pineapple on pizza who are from Congo p hat=11/32

For each of the steps below, explain your work in words, symbols, and pictures.

1. Write the null and alternative hypotheses in words and symbols.

2. Check the conditions necessary to use the Central Limit Theorem.

3. Select an alpha level and use it to find the critical values.

4. Find your test statistic and compare it to the critical values.

5. Compute the p-value of your test statistic and compare it to alpha.

6. Describe what the p-value measures in this hypothesis test.

7. Make a decision about the null hypothesis.

8. Interpret that decision.

What does the term piecewise mean when referring to linear functions? Is a piecewise function always continuous across its entire domain? Explain your answer and give an example. Give an example of a piecewise function using functional notation and state its domain

After the 2016 presidential election, Gallup collected a random sample of 1,021 Americans and estimated that 47% of Americans wanted to keep the electoral college. One month before the election, in October 2016, another random poll of 1,100 Americans estimated that 52% wanted to keep the Electoral College. Statistically speaking, we can look at whether or not we can be sure that there was a change in opinions about keeping the Electoral College between October of 2016 and November of 2016.

(a) What is the point estimate for the November poll?

(b) What is the point estimate for the October poll?

(c) Are these point estimates statistics or parameters? Explain why or why not.

(d) Report and interpret the difference between the two point estimates.

(e) Compute the estimated standard error for the difference between two estimates. Show your work.

(f) Construct and interpret the difference between these groups at the 95% level. Show your work. 1 Now we can also perform a significance test.

(g) State the null hypothesis.

(h) State an alternative hypothesis.

(i) The test statistic z=-2.3012 and its associated p-value is approximately 0.021 for a two-tailed test at the 5% significance level. Interpret this result in regards to the hypotheses you stated above.