an education researcher claims that 57% of college students work year-round. in a random sample of 300 college students,171 say they work year-round.at a=0.10, is there enough evidence to support the researcher's claim? a) fail to reject b) reject

Q: a study is conducted to access the impact of caffeine consumption, smoking, alcohol consumption, and…

A:

Q: The experiment is to toss two balls into four boxes in such a way that each ball is equally likely…

A: Given, An experiment is to toss two balls into four boxes in such a way that each ball is equally…

Q: A medical researcher says that at least 23% of Canadian adults are smokers.In a random sample of 200…

A: The null hypothesis is a simple statement about the value of the population parameter which is…

Q: In a sample of 49 men, 38 said that they had less leisure time today than they had 10 years ago. In…

A: The claim is that there is a difference in the proportions.

Q: One survey conducted by a major leasing company determined that the Lexus is the favorite luxury car…

A: Here we need to find the required test statistic for the given situation. The population proportion…

Q: An educator claims that the average salary of substitute teachers in school districts in Accra, is…

A: To testH0:μ=60H1:μ<60

Q: To be considered 18-karat (18K) gold, a piece of jewelry must be made of 75% pure gold. The higher…

A: It is needed to define the type I error.

Q: A researcher claims that the incidence of a certain type of cancer is less than 5%. To test his…

A: In this context, a researcher claimed that the proportion of incidence of particular type of cancer…

Q: A researcher concluded that a patient was in the risk group of developing a rare disease based on…

A: Solution: Here, hypotheses for this test can be written as follows: H0: A patient was NOT in the…

Q: randomly selected sample of 400 students at a university with 15-week semesters was asked whether…

A: Given that  Sample size n =400 Sample proportion p^=46%=0.46

Q: (a) In a random sample of 500 men from a particular district of UP, 300 are found to be smokers. In…

A: In the first district, Sample size=500Smokers=300 The percentage of smokers is calculated as, P1=No.…

Q: Assume that half the population is vegetarian so that the chance of an individual being a vegetarian…

A:

Q: A study showed that 66% of supermarket shoppers believe supermarket brands to be as good as national…

A:

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone. A…

A: Given Information: 43% of the respondents stated that they talk to their pets on the telephone. A…

Q: In the most recent Rasmussen Report on congressional performance, a random sample of registered…

A:

Q: Of the total 161 patients with diabetes ketoacidosis (DKA), 13 had DKA before and after the pump…

A: We need to conduct a Chi-Square test of Independence. The following information has been provided.…

Q: In a survey of 200 boys, of which 75 were intelligent, 40 had educated fathers; while 85 of the…

A: The question is about categorical data analysis Given : No. of boys under survey = 200 No. of…

Q: To study whether the students at a university are more or less satisfied with the current food…

A:

Q: In a big city 325 men out of 600 men were found to be smokers. Does this information support the…

A: We have given that Sample size n = 600 Favorable cases x = 325 Sample proportion p^=x/n = 0.5417

Q: In a recent study of a random sample of 113 people, 92 reported dreaming in color. In the 1940’s,…

A: The random variable dreaming in color follows binomial distribution. The sample size is 113. The…

Q: A random sample of voters found that 180 out of 320 people were in favor of a gas tax. Election…

A: Given Random sample is 180 out of 320 voters are in support of tax. Total 36000 people voted in…

Q: A research center claims that 30% of adults in a certain country would travel into space on a…

A: Given,sample size(n)=800sample proportion(p^)=0.34α=0.01

Q: To study whether the students at a university are satisfied with the food service, a sample of 200…

A:

Q: A study showed that 63% of supermarket shoppers believe supermarket brands to be as good as national…

A:

Q: Fifty-five customers of a large-chain grocery store are asked to fill out an in-store survey. One of…

A: Given data Fifty-five customers of a large-chain grocery store are asked to fill out an in-store…

Q: 4. In a survey of 1,000 students taking online classes during the past 2 years found that 720 were…

A: Hii

Q: The grades of a sample of 9 students on a prelim exam (x) and on the midterm exam (y) are shown in…

A: Let X denote the prelim exam Let Y denote the midterm exam Calculation:

Q: a) Does chocolate help heart-attack victims live longer? Researchers in Sweden randomly selected…

A: Chi-square independence test: The chi-square is a non-parametric test which is used for comparing…

Q: In 1948, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: State the hypotheses.   Obtain the value of the test statistic. The value of test statistic is…

Q: In a recent study of a random sample of 113 people, 92 reported dreaming in color. In the 1940’s,…

A: Solution

Q: A dietitian read in a survey that at least 65% of adults do not eat breakfast at least 2 days a…

A: Given: Sample size, n=70No. of respondents skipped the breakfast, x=42α=0.05test proportion, p0=0.65

Q: The Associated Press found that 730 of 1000 randomly selected adults preferred to watch movies at…

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: In a survey of 490 drivers from the​ South, 409 wear a seat belt. In a survey of 340 drivers from…

A: Determine the claim. The claim is stated below as follows: The claim is​ "the proportion of drivers…

Q: A manufacturer claims that at most 5 percent of thetime a given product will sustain fewer than…

A: Solution: A manufacturer claims that at most 5 percent of the time a given product will sustain…

Q: Any athlete who fails the Enormous State University's women's soccer fitness test is automatically…

A: Let's assume,  F = athlete fit enough to play F'= athlete is unfit. P = athlete passes the test…

Q: A research center claims that 31% of adults in a certain country would travel into space on a…

A: To testH0:p=0.31H1:p≠0.31 where p0=0.31

Q: A sociologist sampled 200 people who work in computer-related jobs, and found that 42 of them have…

A:

Q: An education researcher randomly assigns a group of 47 fourth grade students to receive a new…

A: Solution: Two sample t test: If the collected two samples are independent, two sample t-test should…

Q: A psychologist specializing in marriage counseling claims that, among all married couples, the…

A: (a) The hypothesis is, Null hypothesis: H0:p≥0.79 Alternative hypothesis: H1:p<0.79 (b) Checking…

Q: A sample of 300 items was selected. compute the p-value

A:

Q: A research center claims that 30% of adults in a certain country would travel into space on a…

A: Given ,  Sample size = n = 1200 Sample proportion = p^ = 33% = 0.33 a)  Claim : 30% of adults in a…

Q: It has been claimed that at UCLA at least 40% of the students live on campus. In a random sample of…

A:

Q: To appeal to customers that are trying to cut calories, a company that sells orange juice decides to…

A: In order to test the consumer group belief, determine whether the population proportion of water in…

Q: A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress.…

A: The test statistic for a single proportion, Z=p-PP(1-P)nwhere p=sample proportionP=population…

Q: Based on past experience, a hiring manager believes that less than one-third of applicants are…

A: Solution: State the hypotheses Null hypothesis: That is, the proportion of applicants that are…

Q: A study by Consumer Reports showed that 64% of supermarket shoppers believe supermarket brands to be…

A: We have given that  Sample size n= 100 Favorable cases x = 54 Sample proportion p^=x/n…

Q: The administration of a University claims that 47 percent of the students change their major area of…

A:

Q: 3 out of 4 american adults under age 35 have eaten pizza for breakfast. if a random sample of 20…

A: Let the R.V X denotes the number of adults eaten pizza for breakfast and it follows the binomial…

Q: In a report concerning the rise of automation in the United States, 55% of the participants…

A: (a) Let p is denotes as the population proportion of Americans who would not ride in a driverless…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.