A recent study at a local college claimed that the proportion, p, of students who commute more than fifteen miles to school is no more than 20%. If a random sample of 255 students at this college is selected, and it is found that 52 commute more than fifteen miles to school, can we reject the college's claim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below.  Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)

Q: Use the appropriate statistical tables.  A recent survey showed that from a sample of 500 packages…

A: Given, A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480…

Q: What percent of cans will have a caffeine content greater than 35 mg?

A: Let X be the random variable of the caffeine content of a cola.Given that,Population mean

Q: How many repair records should be sampled if GM wants the population mean number of miles driven…

A: 1. The critical value of t-distribution at 59 degrees of freedom can be obtained using the excel…

Q: In 2016, the US poverty rate was 12.7%. During that year, 375 families where randomly selected in…

A: From the given information, let X be the number of families were found to be living below the…

Q: Construct a 90% confidence interval for the true difference between the mean amounts of time spent…

A:

Q: Sam runs a large chain of car repair shops. He pays his employees for 8 hours of work each day. The…

A: The objective is to find out whether response bias, non-response bias, sampling variation, or…

Q: One study claimed that 86% of college students identify themselves as procrastinators. A professor…

A:

Q: Newborn babies are more likely to be boys than girls. A random sample found 13,573 boys were born…

A: The claim of the test is there is sample evidence that the birth of boys is more common than the…

Q: The average one-ounce chocolate chip cookie contains 128 calories. A random sample of different…

A:

Q: torists do not have motor vehicle insurance. A random survey amongst 150 motorists found that 54 do…

A: A random survey amongst 150 motorists; n=150

Q: ce interval does not cc lent that the mean am chan the mean amoun

A: Let Population 1 be people who exercise in the morning and Population 2 be people who exercise in…

Q: The table below summarizes the  results of a survey in which randomly selected people were asked how…

A: It is needed to test, whether the feelings on medical marijuana and gender are independent or not.

Q: An adventure company runs two obstacle courses, Fundash and Coolsprint. The designer of the courses…

A:

Q: sed on data from the U.S. Bureau of Economic Analysis). Tom ns to open a Cadillac car dealership and…

A: The claim is that the sample was drawn from a population with mean 13901. The null hypothesis is,…

Q: A national survey of 1000 adult citizens of a nation found that 19% dreaded Valentine's Day. The…

A:

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given : Mean = μ = 0.36  Level of significance = 0.05 p^ = xn    = 31118    = 0.2627

Q: An adventure company runs two obstacle courses, Fundash and Coolsprint. The designer of the courses…

A: Since you have posted a question with multiple subparts, we will solve the first 3 sub-parts for…

Q: 52% of students entering four-year colleges receive a degree within six years. Is this percent…

A: Solution: Given information: n= 231 Sample size  x= 129 success  p^=xn= 129231=0.5584   Sample…

Q: The average salary for American college graduates is 540,300. You suspect that the average is…

A: Note- Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: reasons, calf dehorning has become a routine practice at dairy farms. A report by a continental…

A: Answer The sample size [n] =635The favorable cases [x] = 513The population proportion [p] = 0.80

Q: Q10. The length of parts produced by which lathe machine satisfies the normality assumption based on…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is…

A: Given,n=321x=22p^=xnp^=22321=0.0685α=0.01

Q: Perform a statistical analysis/test of hypothesis, showing all the steps in hypothesis testing.  A…

A: The following information has been given: n=60                s=1.052x¯=7.25

Q: Using EXCEL, develop a 95% confidence Interval estimate for the Mean number of miles driven until…

A: 1. The 95% confidence interval is obtained by using the EXCEL(PHStat). The software procedure is…

Q: Labor day was created by the U.S. labor movement over 100 years ago. In a recent Gallop Poll, 1010…

A: Solution

Q: A contributor for the local newspaper is writing an article for the weekly fitness section. To…

A: The question is about confidence intervalGiven :Randomly selected no. of people who exercise in the…

Q: Does 10K running time change when the runner listens to music? Nine runners were timed as they ran a…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A teacher claims that his students have an average social media usage that is different from 1.83…

A:

Q: A real estate agent compares the selling prices of randomly selected homes in two municipalities in…

A: The objective of this question is to determine if there is a significant difference in the average…

Q: A study was conducted in which students were asked to estimate the number of calories in a…

A: Approach to solving the question:(b) A Type I error is committed if one concludes that the mean…

Q: The College Board provided comparisons of Scholastic Aptitude Test (SAT) scores based on the highest…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: The mayoral challenger claims that less than 30% of residents over the age of 25 have bachelor’s…

A:

Q: Professors collected data consisting of eye color and gender of statistics students. Among 912 male…

A:

Q: Before the furniture store began its ad campaign, it averaged 182 customers per day. The manager is…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: Can you conclude that the proportion of boys who are overweight differs from the proportion of girls…

A: Here use  proportion test for 2 sample

Q: A middle school wanted to examine if students' sense of school belongingness increased after…

A: It is wanted to be examined by the middle school whether the sense of school belongingness of…

Q: ppose you are interested in testing whether the mean earning of men in California differs…

A: It is given that n1 is 123 and n2 is 88.

Q: If Q1 is the value for which 25% of observations are smaller, then A. Only 25% of the observations…

A: Three values, i.e., Q1, Q2 and Q3 called quartiles, divide sorted data into four equal portions with…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The value of p0 is 0.52 and the sample size n is 800.

Q: The accompanying table gives amounts of arsenic in samples of brown rice from three different…

A: The question is about ANOVA.Given :

Q: Past surveys showed that 44.2% of Filipino households have pets. A recent survey reported that 516…

A: Given: x = 512 n =1200 p= 44.2% = 0.442

Q: believes that th 272 college student- of One study claimed that 88 % of college students identify…

A: The question is about hypo. testing Given : Popl. prop. of students who identify themselves as…

Q: Twenty years ago, 56% of parents of children in high school felt it was a serious problem that high…

A: The hypothesized proportion is 0.56.

Q: b. The null and alternative hypotheses would be: Ho: ?v Select an answerv (please enter a decimal)…

A: We have given null and alternative hypothesis and test statistic and p- value..

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.