ECONOMICS QUESTIONS

Fill in the blank. The​ _______ is the best point estimate of the population mean. The sample mean is the best point estimate of the population mean.

Which of the following is NOT a requirement for constructing a confidence interval for estimating a population mean with σ ​known?Choose the correct answer below. A.Either the population is normally...

Twelve different video games showing drug use were observed. The duration times of drug use were​ recorded, with the times​ (seconds) listed below. What requirements must be satisfied to test the claim that the...

Twenty-nine different video games showing drug use were observed. The duration times of drug use ​(in seconds) were recorded. When using this sample for a t test of the claim that the...

In a study of 782 randomly selected medical malpractice​ lawsuits, it was found that 489 of them were dropped or dismissed. Use a 0.05 significance level to test the claim that...

Assume that adults were randomly selected for a poll. They were asked if they​ “favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human​ embryos.”...

In a study of the accuracy of fast food​ drive-through orders, one restaurant had 32 orders that were not accurate among 373 orders observed. Use a 0.10 significance level to test...

A certain drug is used to treat asthma. In a clinical trial of the​ drug, 18 of 289 treated subjects experienced headaches​ (based on data from the​ manufacturer). The accompanying calculator display shows...

The test statistic of z=−1.84 is obtained when testing the claim that p<0.65 .a. Using a significance level of α=0.05​, find the critical​ value(s) b. Should we reject H0 or should...

The test statistic of z=2.65 is obtained when testing the claim that p≠0.726. a. Identify the hypothesis test as being​ two-tailed, left-tailed, or​ right-tailed. b. Find the​ P-value. c. Using a significance level...

​Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 570 randomly selected adults showed that 57​% of them would erase...

Make a decision about the given claim. Use only the rare event​ rule, and make subjective estimates to determine whether events are likely. For​ example, if the claim is that a coin...

Claim: Most adults would not erase all of their personal information online if they could. A software firm survey of 664 randomly selected adults showed that 0.2​% of them would erase...

Claim: The standard deviation of pulse rates of adult males is less than 10 bpm. For a random sample of 132 adult​ males, the pulse rates have a standard deviation of 9.7...

The Ericsson method is one of several methods claimed to increase the likelihood of a baby girl. In a clinical​ trial, results could be analyzed with a formal hypothesis test with...

​Claim: A majority of adults would erase all of their personal information online if they could. A software firm survey of 474 randomly selected adults showed that 61​% of them...

Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts​ (a) through​ (c) below. TInterval ​(13.046,22.15) xbar =17.598 Sx=16.01712719 n=50 a. Express the...

Which of the following groups has terms that can be used interchangeably with the​ others?Choose the correct answer below. Critical​ Value, Probability, and Proportion​ Percentage, Probability, and Proportion Critical​ Value, Percentage, and Probability...

You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you​ survey? Assume...

In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time college students who earn a​ bachelor’s degree in four years or less. Find the...

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 330 babies were​ born, and 297 of them were girls. Use the sample...

Use the sample data and confidence level given below to complete parts​ (a) through​ (d).In a study of cell phone use and brain hemispheric​ dominance, an Internet survey was​ e-mailed to 2605 subjects randomly...

Use the sample data and confidence level given below to complete parts​ (a) through​ (d).A research institute poll asked respondents if they felt vulnerable to identity theft. In the​ poll, n=981 and x=533...

Express the confidence interval 0.555<p<0.999 in the form p±E. p±E=0.777±0.222

A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie. Among the 500 ​respondents, 13​% chose chocolate​ pie, and the margin of error...