The Human Resources Director of Wayjacks Inc. has administered a dexterity test to job
applicants for a period of several years. She assumes that the times required to complete the task are distributed with a mean of 10.8 minutes. The Director would like to know if applicants who have completed a vocational course tend to complete the task faster than the norm. For a sample of 16 applicants with such a course, she observed the average time of 10.2 minutes and standard deviation of 1.25 minutes to complete the task.
a. Set up appropriate hypotheses, give the p-value and report your conclusions.
b. Based on the result in (a) should she reject the null hypothesis at a=0.025? Explain.
c. What assumption(s) must you make in order that your answers are valid?

The Human Resources Director of Wayjacks Inc. has administered a dexterity test to job
applicants for a period of several years. She assumes that the times required to complete the task are distributed with a mean of 10.8 minutes. The Director would like to know if applicants who have completed a vocational course tend to complete the task faster than the norm. For a sample of 16 applicants with such a course, she observed the average time of 10.2 minutes and standard deviation of 1.25 minutes to complete the task.
a. Set up appropriate hypotheses, give the p-value and report your conclusions.
b. Based on the result in (a) should she reject the null hypothesis at a=0.025? Explain.
c. What assumption(s) must you make in order that your answers are valid?

Sammy, the owner of a fast food chain called Sammy's Subs, wants to know whether the levels of daily sales are different between his shop in Edina and the one in Richfield. He records sales in each shop for a month, in the Sammy's Subs Sales Data Excel file. Use the data in this file to determine whether sales levels are differe

I don't understand how to apply the first four rules of inference to this statement:
"Every piece of reasoning must start somewhere. And if every piece of reasoning starts somewhere, then every piece of reasoning begins with an unsupported premise. Now, if every piece of reasoning begins with an unsupported premise, then all

An agribusiness company currently uses one brand of commercial fertilizer. However, a new fertilizer is available that the manufacturer says will produce higher than average crop yields.
Name the basic category of statistical inference tools the manufacturer would use to provide this information.
Describe a hypothesis upon

Please help with the following problems.
(i) Let {Xi} be a sequence of rv's that converges in probability to a constant a. Assume that P(Xi > 0) = 1.
a) Show that the sequence {Yi} defined by Yi = sqrt(Xi) converges in probability to sqrt(a).
b) Show that, if a>0, the sequence {Zi} defined by Zi = a/Xi converges i

Consider an independent and identically distributed (iid) sample, X1,...., Xn, from a distribution with pdf (see attachment for equations). Use this information to answer the following questions:
a. Find the method of moments estimator of theta.
b. Find the maximum likelihood estimator of theta
c. Find the bias and mean squ

Using the eight rules of inference (Simplication, Conjunction, Addition, Constructive Dilemma, Modus Ponens, Modus Tollens, Disjunctive Syllogism and Hypothetical Syllogism), construct a proof for each of the following valid arguments.
A)
1. (C & ~E) > (E v T) ------- Premise
2. C ------- Premise

Designate each simple statement with a letter. Then write down the compound statements using the following rules(modus ponens, modus tollens, hypothetical syllogism, disjunctive syllogism, addition, simplification, or resolution), arrive at the conclusion. I've done all but the latter.
If you send an email then I will write t

Are we able to draw an inference about competitiveness of an industry from profitability? Or would we need more information to see the competitive level of an industry? Also, would the rate of return earned on capital be enough to infer the competitiveness of an industry or what other information would be needed?
Thank you f