Ask Question, Ask an Expert


Ask Statistics and Probability Expert

1. The number of successes and the sample size are given for a simple random sample from a population. Decide whether using the one-proportion z-test is appropriate.

x = 3, n = 80, H0: p = 0.04, Ha: p > 0.04

Not appropriate


Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between two population proportions. Assume that independent simple random samples have been selected from the two populations.

2. A survey of students at one college found that 57 of 96 randomly selected freshmen and 85 of 118 randomly selected sophomores lived off campus. Find a 98% confidence interval for the difference between the proportions of freshmen and sophomores at this college who live off campus.

-0.278 to 0.025
0.468 to 0.721
-0.254 to 0.721
0.444 to 0.744

Use the one-proportion z-interval procedure to find the required confidence interval.

3. In a sample of 713 patients who underwent a certain type of surgery, 22% experienced complications. Find a 90% confidence interval for the proportion of all those undergoing this surgery who experience complications.

0.2045 to 0.2355
0.2001 to 0.2399
0.1892 to 0.2508
0.1945 to 0.2455

Find the P-value for the indicated hypothesis test.

4. In a sample of 47 adults selected randomly from one town, it is found that 9 of them have been exposed to a particular strain of the flu. Find the P-value for a hypothesis test to determine whether the proportion of all adults in the town that have been exposed to this strain of the flu differs from 8%.


Find the required sample size without making a guess for the observed value of .

5. A manufacturer wishes to estimate the proportion of washing machines leaving the factory that are defective. Obtain a sample size that will ensure a margin of error of at most 0.014 for a 97% confidence interval.


Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M91767072
  • Price:- $25

Priced at Now at $25, Verified Solution

Have any Question? 

Related Questions in Statistics and Probability

Examine the history of american party politics from the

Examine the history of American party politics from the Great Depression through the 1990s. Trace the evolution of the major political parties, their policies, and their constituencies during this period.

A laboratory in california is interested in finding the

A laboratory in California is interested in finding the mean chloride level for a healthy resident in the state. A random sample of 50 healthy residents has a mean chloride level of 100 mEq/L. If it is known that the chl ...

In onenbsptownnbsp24nbspof all voters are democrats if two

In one town, 24% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats. Round to the nearest thousandth if necessary.

There are 1000 students in a high school among the 1000

There are 1000 students in a high school. Among the 1000 students, 150 students take AP Statistics, and 300 students take AP French. 100 students take both AP courses. Let S be the event that a randomly selected student ...

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 ...

Onenbspstudy based on responses from 1015 randomly

One study, based on responses from 1,015 randomly selected teenagers, concluded that 44% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half ...

Statistics assignmentquestions address all of the following

Statistics Assignment Questions: Address all of the following questions in a brief but thorough manner. • What are the most common measures of central tendency? Include brief definitions for the common measures of centra ...

1 how does the sample size influence the extent to which

1. How does the sample size influence the extent to which the sample data can be used to accurately estimate population parameters? 2. What statistics are used to indicate how accurately the sample data can predict popul ...

In a normal distribution what percentage of scores fall

In a normal distribution, what percentage of scores fall between -1 and +1 standard deviations from the mean? Between the mean and -2 standard deviations ? Between the mean and +3 standard deviations?

Suppose that fara is preferred by every man to all the

Suppose that Fara is preferred by every man to all the other women. Prove that under every stable matching Fara is matched to the same man. Who is the lucky guy?

  • 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