Fasteners are manufactured for an application involving aircraft. Each fastener is categorized either as conforming (suitable for its intended use), downgraded (unsuitable for its intended use but usable for another purpose), and scrap (not usable). It is thought that 85% of the fasteners are conforming, while 10% are downgraded and 5% are scrap. In a sample of 500 fasteners, 405 were conforming, 55 were downgraded, and 40 were scrap. Can you conclude that the true percentages differ from 85%, 10%, and 5%? a) State the appropriate null hypothesis. b) Compute the expected values under the null hypothesis. c) Compute the value of the chi-square statistic. d) Find the P-value. What do you conclude?

Q: An environmentalist wants to compare the pH levels in lakes near the west coast of the United States…

A: As per the information in the question, The water is sampled from 5 randomly selected lakes from…

Q: In a survey of 1000 adult Americans, 45.4% indicated that they were somewhat interested or very…

A:

Q: Wind turbines are notorius bird killers. In the name of green energy, a study was onducted to reduce…

A: c) In an experiment, factor is a variable that define the categorization. It can be fixed or random…

Q: Human blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a…

A: From the given data we have,  Total Blood Type=8

Q: composed of international students. Which one of the following numbers is a statistic?

A: A parameter is a measure which us based on whole population. A statistic is a measure which is based…

Q: test statisu tnis nypotnesis test. | (Round to two decimal places as needed.)

A: p1 = 352/1100 = 0.32 p2 = 275/1100 =0.25

Q: uring a season in order to restock the lake with the appropriate number of young fish. The ommission…

A: Given:- Below is the least-squares regression equation: In (y) =  0.76 + 0.0914x.

Q: The following table gives the percent of a country's population having each of the eight possible…

A:

Q: rding to a recent census, 15% of the people in the United States are of Hispanic origin. One county…

A: given data  n = 457 x = 48 claim = p ≠ 0.15

Q: Independent t:  The Department of Motor Vehicles (DMV) enlisted the help of a social psychology…

A: Given Information : The Department of Motor Vehicles (DMV) enlisted the help of a social psychology…

Q: suppose that from a sample of 200,000 new york workers, 32,400 reported traveling more than an hour…

A: About 16.2% of the workers in the state traveled more than an hour to work every day in 2011. That…

Q: To determine if there is gender and/or race discrimination in car buying, lan Ayres put together a…

A:

Q: Ford Motor Company is conducting a survey concerning consumer buying preferences of a particular…

A: Regression means the theory of estimation of the unknown value of a variable with the help of a…

Q: Identify each of the following designs as being an observational study or an experiment. If the…

A:

Q: In statistical surveys where individuals are randomly chosen and asked​ questions, experience has…

A: From the above given data the following solution is provided below:

Q: If a part is within the specified tolerance limits for height, what is the probability that it will…

A: Let L,W and H be the events that the length, width and height respectively are with in the specified…

Q: Fasteners are manufactured for an application involving aircraft. Each fastener is categorized…

A: Answer   Given : conforming = 85% Down graded = 10% Scrap = 5%

Q: The accompanying table summarizes data from a survey of 3,594 parents with school-aged children. In…

A: Given Information: In a survey parents were asked if they were completely satisfied with the…

Q: A quality control marketing manager orders parts and the parts are shipped in lots of sizes 15. When…

A: From the given information, a lot contains size as 15 and the manager randomly inspects 4 parts from…

Q: Many fundraisers ask for donations using email and text messages. A paper describes an experiment to…

A: Let p1 be the proportion who make a donation after receiving an email, and p2 be the proportion who…

Q: An online bookseller is considering selling an e-reader but will only do so if they have evidence…

A: Let,  denote the number of customer who likely purchase an e-reader.Where, denote the number of…

Q: The Consumer Reports Restaurant Customer Satisfaction Survey is based upon 148,599 visits to…

A: Using Excel >data analysis > one-way anova, we get :

Q: The national Park service monitors streams in Rainier national park for pollution and fish spawning…

A: Solution: Let A be the event that a stream polluted is 0.62 and B be the event that the streams in…

Q: Applicants for temporary office work at Carter Temporary Help Agency who have successfully completed…

A: Given: 75% of the employees placed by Nancy are rated as satisfactory 65% of those placed by Darla…

Q: A report described a survey of parents of children under the age of 18. Each person in a…

A: According to the given information in this question, we need to construct 95% confidence interval

Q: The Women’s Institutional Studies group at a Midwestern university wanted to compare the percentages…

A: From the provided information,

Q: A auto shop wants to examine the proportion of customers that have to return after an appointment.…

A:

Q: An article included data from a survey of 2587 hiring managers and human resource professionals.The…

A: From the provided information, Margin of error (E) = 0.03 Confidence level = 99%

Q: Many fundraisers ask for donations using email and text messages. A paper describes an experiment to…

A: There are two independent samples which are donation after receiving an email and after receiving a…

Q: A state fisheries commission wants to estimate the number of bass caught in a given lake during a…

A: Given :

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.