Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

1. A random sample of 200 freshman and 100 seniors at Ferris High School are asked whether they agree with a plan to excuse upper class students (juniors and seniors) a half hour early while keeping underclass students (freshmen and sophomores) in school for the last half hour. Of the students sampled, 160 freshmen opposed the plan and 20 seniors opposed the plan.

-Is there a difference (5% level of significance) between the proportion of freshmen who oppose the plan and the proportion of seniors who oppose it? Do a complete test showing all the parts.

2) In a study of heart surgery, one issue was the effect of drugs called beta-blockers on the pulse rate of patients during surgery. The available subjects were divided at random into two groups of 30 subjects each. One group received the beta-blocker and the other received a placebo. The pulse rate of each patient at a critical point during the operation was recorded. The treatment group had a mean of 65.2 and standard deviation of 7.8. For the control group, the mean was 70.3 and standard deviation was 8.3.
You want to see if the beta-blockers reduce the pulse rate.

a. Test the data at the 5% level of significance. Give good statistical evidence. (ie., use the appropriate 4-part format).

b. Give a 99% confidence interval for the difference in mean pulse rates.

c. Interpret the confidence interval you constructed

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M944768

Have any Question? 


Related Questions in Statistics and Probability

A coffee store owner knows that a customer gets a coffee in

A coffee store owner knows that a customer gets a coffee in 35% of the store's transactions. If we take a random sample of 300 customers, what is the probability that less than 32% of them buy a coffee? (A) 0.1292 (B) 0. ...

A researcher found a significant relationship between a

A researcher found a significant relationship between a student's IQ, x1, grade point average, x2, and the score, y, on the verbal section of the SAT test. The relationship can be represented by the multiple regression e ...

Electronic mail game let lgtmgt 0 be two positive real

Electronic Mail game Let L>M> 0 be two positive real numbers. Two players play a game in which the payoff function is one of the following two, depending on the value of the state of nature s, which may be 1 or 2: The pr ...

1nbspa camp director is interested in the average number of

1. A camp director is interested in the average number of letters each child sends during his/her camp session. The population standard deviation is known to be 2.5. A survey of 45 campers is taken. The average from the ...

In minitab open the data set pulsemtw you may assume that

In Minitab, open the data set PULSE.mtw. You may assume that these 92 students are a random sample of all undergraduates. (a) Obtain a 95% confidence interval for µ F  - µ M , the extent to which average pulse rates of f ...

You plan to start saving for your sons college education he

You plan to start saving for your son's college education. He will begin college when he turns eighteen and will need $4,000 then and in each of the following three years. You will make a deposit at the end of this year ...

1 what geographical and historical factors have led

1. What geographical and historical factors have led Singapore to develop such a particular, and highly valued, local form of the English language? 2. Why are the tiny Spratly Islands such a controversial issue in Southe ...

The potential revenues of all projects are in fact

The potential revenues of all projects are in fact uncertain. The company determines that the revenue for project 1 is following a uniform distribution ranging from $1,200,000 to $2,000,000. The revenue for project 2 is ...

Analyze the emergence of the counter-culture identity

Analyze the emergence of the counter-culture, identity politics, and liberation movements beginning in the late 1960s. Why did these movements emerge at that time? How did they reshape American culture and politics? Were ...

Describe secretary of state john quincy adamss address to

Describe Secretary of State John Quincy Adams's Address to Congress, July 4, 1821. As a statement of American Foreign Policy, what does it assert? Do you think it accurately reflects American Foreign Policy up to that ti ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen