.The sports equipment company developed a synthetic type of fishing line which is claimed to have an average strength of 8 kg and a standard deviation of 0.5 kg. It is known that with a sample of 50 synthetic fishing rods the average strength is 7 kg. With a significance level of 0.01, Test the hypothesis that the population mean is really equal to 8 kg

Q: 2: The following sample scores were obtained from a population with unknown parameters: 1, 5, 1, 1…

A:

Q: A real estate investor wants to decide whether it is a good investment to build a high-end shopping…

A: i. Consider that µ is the population mean market price of houses in the suburb.

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Q: An insurance company is reviewing its current policy rates. When originally setting the rates they…

A: we have given that n=40 ,mu=1800 , xbar=1950 and sigma=500 , alpha =0.05

Q: 1. A sample of 70 observations was selected from a normal population. The sample mean is 2.78 and…

A: For the given data Determine if z-test, t-test or f-test will be used.

Q: STEP 1. H0: µ o   H1: µ o         NOTE: For ≠ enter /=   STEP 2. This test is (e) left-tailed, (f)…

A: Given that  x̄ = 54 ,  μ = 56 , ? = 5.6 , n=37 Note: According to bartleby experts question answers…

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A: By using the given data we have to find out the sample meansand sample standard deviations

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Q: What the consequences of making a Type I error? e. What the consequences of making a Type II error?

A: The provided information is  µ=21.4 σ=5.4 n=35 The null and alternative hypothesis are…

Q: 2. A Flemish student organisation claims that the average undergraduate student loan debt at a…

A: Hello there!! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: If a random sample of size 36 is obtained from a population with mean u=50 , and standard deviation…

A: Given,   Mean = 50 Standard deviation = 24 Sample size = 36

Q: 1. The following experiment was conducted to compare the yields of two varieties of blueberry…

A: Solution We are interested to test there is a difference inthe mean yield for these two varieties?…

Q: certain city, a researcher wishes to determine whether the average income of the residents is…

A: Given

Q: there sufficient evidence at a=0.01 to conclude that their health care expenditure differs from the…

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Q: Given a sample mean of 94.3, a sample standard deviation of 8.4 and a sample size of 6, test the…

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Q: 1. The local chapter of the National Organization of Women (NOW) Claims that female College…

A: Given: n1 = 35 n2 =30 x1 bar = 35000 x2 bar = 34000  s1 = 800 s2= 1000 Level of significance =0.01

Q: 6. The Ministry of Health reports that the average cost of rehabilitation for earthquake victims is…

A: Given  Mu=25750, Xbar=25250, s=3250, n=144

Q: The Water Resource Department claims that the mean pH level of the river water is 6.8. You randomly…

A: Given,sample size(n)=19sample mean(x¯)=6.7sample standard deviation(s)=0.24population…

Q: Question 15 is what I am struggling with. Please help, thank you.

A: The hypotheses are given below:

Q: An ice cream company owns two plants, namely A and B, and wants to test using a 5% significance…

A: Given: The two plants of ice cream company are A and B. The level of significance is α=0.05. The…

Q: A.  A beverage bottling company labels a product as having a mean volume of 16 oz.  It is important…

A: A. The beverage bottling company labels a product as having a mean volume of 16 oz.

Q: travel times to work- Based on information from the U.S. Census Bureau, the mean travel time to work…

A: The test hypotheses are given below:

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given that                  We have to find  (a) The question of interest is whether the mean…

Q: .1 The operations manager of a motor vehicle accessories firm with branches in Limpopo and Durban…

A: Solution: Given information: n1= 31  Sample size of Limpopo branch n2= 35   Sample size of Durban…

Q: The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries…

A: Given, x=46.05n=25σ=5.1α=0.025 The hypothesis to be tested here is: H0:μ=50H1:μ<50 This is a left…

Q: 13. In determining automobile mileage ratings, it was found that the mpg (x) for a certain model is…

A: Given, x is the mpg which follow normal distribution i.e. X~Nμ,σ2. μ= 36 and σ=1.6

Q: Question #3 i started problem little P#1 mean =9 SD= 3.5 n=  28 P#2 mean 13 SD= 4.5 n=23  Chpt  10

A: The aim is to check whether there is a difference between the average manufacturing times in the two…

Q: 1- Applying for a specific job requires obtaining the mark of 500 in the contest exam. If 16 persons…

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Q: 4. The existing system for the production of a certain item has a mean of 50 seconds, and a standard…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: 1.     A tire company claims that its top selling brand averages at least 50,000 miles before it…

A: Given : x¯ = 46500 σ = 8000 n = 28 level of significance = 0.05 a. Here we have known population…

Q: 1. A business consultant wanted to investigate if providing day-care facilities on premises by…

A: Let, 1: Provided day-care facilities 2: Not provided day-care facilities Given:

Q: The Orange County Supervisor claims that full-time salaried employees in her county have a mean…

A: Given:

Q: You wish to test the claim that Washington residents (Group 2) have a higher average monthly bill…

A: Given information- Significance level, α = 0.02 Test Hypothesis is Null Hypothesis, H0: μ1 - μ2 = 0…

Q: The National Weather Service says that the mean daily high temperature for October in a large…

A: Given that  The National Weather Service says that the mean daily high temperature for October in a…

Q: 2. A scrap metal dealer claims that the mean of his cash sales is "no more than $80," but an…

A: Given that: Population mean(u) = $ 80 Sample mean = $ 91 SAMPLE standard deviation = $21 Sample size…

Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if…

A: Hypothesis Testing (Z-TEST)           In statistics, we have to determine the variation…

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A: For X, a random variable, the Z-score is, Z=X-μσwhere, μ=population mean             σ=population…

Q: firms carry inventories that differ in size. Firm A’s inventory contains 2000 items, (4) firm B’s…

A: The given information is that sample of 50 items from its inventory is taken. Firm A’s inventory…

Q: 1. The average height of all previous contestants in a beauty pageant has been 180 cm with a…

A: The given mean for all previous contestants is 180 cm and standard deviation is 5 cm. That is,…

Q: 1. The owner of a gas station which makes headlight inspections for the state is trying to decide…

A: Given data : sample size, n = 52 sample mean, x̄ = 16.7 sample standard…

Q: 2) A job placement director claims that the average starting salary for nurse is $26000. A sample of…

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Q: 3- At a computer manufacturing company, the actual size of a particular type of computer chips is…

A: We have to find required sample mean.

Q: This is a multiple choice question, which one is correct? *Question 1

A: From the provided information,Population mean (µ) = 12.5Sample mean (x̄) = 12.9Sample size (n) =…

Q: 1. It is claimed that the average weight of a bag of biscuits is 250 grams with a standard deviation…

A: Given  μ=250, σ=20.5, n=50, x̄=240, ɑ=0.05 We want to test the hypothesis.

Q: 2.) A ski gondola in Vail, Colorado that carries skiers up a mountain bears a plaque stating that…

A: n=12, maximum weight = 2004 mean = 188.6  std.dev = 38.9

Q: . According to Dietary Goals for the US (1977), high sodium intake may be related to ulcers, stomach…

A: (1) We have given that,  Sample mean (x̄) = 203, standard deviation   (s)= 6.2 , sample size (n) = 9…

Q: The instruction manual for an IKEA bookshelf claims that it will take 2 people 41 minutes to…

A: The Null hypothesis H0: μ = 41. Alternative hypothesis Ha: μ <41 Here, α =0.10 Since population…

Q: 1.) It is claimed that the average performance of newly graduated nurses from the recent board exam…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: 1. A company, which makes battery-operated cars, claims that its products have a mean life span of 5…

A: Given: Population mean = 5 Sample mean = 4 Standard deviation = 10 Sample size = 40