A MANUFACTURER CLAIMS THAT ONLY 4% OF HIS PRODUCTS ARE DEFECTIVE. A RANDOM SAMPLE OF 500 WAS TAKEN AMONG WHICH 100 DEFECTIVE. TEST THE HYPOTHESIS AT 0.05 LEVELS.
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
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Q: n₁ = 14, n₂ = 12, x₁ = 21, ₂22, s, 2.5, s₂ -2.8 OA Reject Ho if the standardized test statistic is…
A: We have given that Sample mean (x̅1) = 21Sample mean (x̅2) = 22Sample size (n1) = 14Sample size…
Q: Are most student government leaders extroverts? According to Myers-Briggs estimates, about 82% of…
A: Given Information: Probability of college government leaders are extroverts (po) = 0.82 The…
Q: A researcher randomly selected a sample of n = 500 individuals from a population with µ = 120 and…
A: The question is about hypothesis testing.Given :Randomly selected no. of individuals ( n ) = 500Mean…
Q: The U.S. Energy Information Administration claimed that U.S. residential customers used an average…
A: From the provided information,Sample size (n) = 128Sample mean (x̄) = 10745Population standard…
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts. In case…
Q: You are testing the null hypothesis that there is no relationship between two variables, X and Y.…
A: FORMULA : F = MSR/MSE
Q: A researcher claims that 29% of adults in a certain country would travel into space on a commercial…
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Q: A sample of n=30 college sophomores was drawn to assess the number of times per day they open some…
A: Obtain the Z-score for the random variable M equals 40 The Z-score for the random variable M equals…
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A: Given: Level of significance = 0.05 n = 19 Sample mean = x bar = 1450 s = 202
Q: The sample is actually 55. what is the critical value?
A: It is given that the sample is 55 and there are three treatments.
Q: People who live near a former rocket-tes are concerned that perchlorate is preser unsafe amounts in…
A: mean = 24.5 n = 28 sample mean = 25.3
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A:
Q: An environmentalist wishes to conduct a hypothesis test on the percentage of cars driven in the city…
A: Sample size(n)=143 Population proportion(P)=0.04 q=1-p q=1-0.04=0.96
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A:
Q: Past records indicate that 45% of students eat breakfast while driving to school. A campaign to…
A: Solution: State the hypotheses Null hypothesis: That is, the proportion of students eats breakfast…
Q: According to a certain government agency for a large country, the proportion of fatal traffic…
A: It is given that:Sample size: Number of positive BAC in sample: Level fo significance: We have to…
Q: A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population…
A: From the provided information, i) The level of significance (α) = 0.01 The hypotheses can be…
Q: mates that the average daily per-store theft is less than $100, but wants to determine the accuracy…
A: Mall security estimates that the average daily per-store theft is less than $100, but wants to…
Q: A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population…
A: Part 2 The chi-square test statistic and p-value can be calculated using Minitab as: Step 1: Open…
Q: SHOP AT WORK, LOSE YOUR JOB? CareerBuilder.com conducted a survey of 2245 employers asking if they…
A: Given Information: Sample size n=2245 x=257 A manager at a local recruiting agency claims that more…
Q: Sal knows that parties of people on average spend 75 minutes at their restaurant. They wonder if…
A: Given Sample mean x̄=82, n=sample size=30, s=sd=17, level of significance ɑ=0.05
Q: o combat antibiotic resistance, the Quality Improvement Consortium recommends a throat swab to…
A: (a-1) According to the provided data, the null and alternative hypotheses are; Therefore, the first…
Q: A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population…
A: Age Observed value under 20 29 20-35 25 36-50 65 51-65 67 over 65 24
Q: Proctor & Gamble claims that at least half the bars of Ivory soap they produce are 99.44% pure (or…
A: Here we use z-test of a proportion. Proctor & Gamble claims that at least half the bars of Ivory…
Q: sample 1 (M cars) : n1 = 24, X ̄1 = 29.8, s1 = 2.56 sample 2 (J cars) : n2 = 28, X ̄2 = 27.3, s2 =…
A: Given Data : For Sample 1 x̄1 = 29.8 s1 = 2.56 n1 = 24 For Sample 2…
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A: Given, n = 18 μ = 18x = 1380s = 248α = 0.1 To find, Check the claim it be concluded that the…
Q: In 1945, an organization asked 1540 randomly sampled Americancitizens, "Do you think we can…
A: Given, The sample proportion is,
Q: A researcher administers a new treatment to a sample of participants selected from a population with…
A: According to the provided information, a sample of participants selected from a population with µ =…
Q: in a study of eating habits it is made that a greater proportion of girls skip breakfast then boys.…
A: From the provided information,
Q: In a survey of 460 drivers from the South, 397 wear a seat belt. In a survey of 340…
A: Given Information: Number of drivers surveyed from south, n1 =460. Number of drivers who wear seat…
Q: It has been claimed that 71% of all adults use their cell phones within an hour of going to bed.…
A:
Q: For your study on the food consumption of teenage males, you randomly selected 20 males and ask each…
A: From the provided information,The data values are as follow:3.3, 4.1, 3.5, 2.7, 3.4, 3.3, 4.8, 3.4,…
Q: A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population…
A: A) The null and alternative hypotheses are stated below: H0: P1=0.20, P2= 0.14, P3= 0.30, P4= 0.24…
Q: We have Ho : p = .4 and H1: p > .4. You run 50 experiments and find that the sample proportion is…
A: GivenH0:p=0.4H1:p>0.4sample size(n)=50sample proportion(p^)=0.42α=0.01
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A: From the given information we conduct T test for one mean.
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A: From the provided information, Sample size (n) = 15 Sample mean (x̅) = 1517 Standard deviation (s) =…
Q: In the US, 46.6% of all people have type O blood, 39.6% have type A blood, 10% have type B blood and…
A: 46.6% of all people have type O blood.39.6% have type A blood.10% have type B blood.3.8% have type…
Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…
A: Given n=11 x=1332s=232α=0.05
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- A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Five hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 10%. Calculate the predictive value of a positive test.Suppose we want to know if the proportion of people with a certain trait is less than 0.5. We observe 100 people and find that 44 of them have the trait of interest. Assume that the samples are Normally distributed. Conduct a hypothesis test at level 0.05 using a p-value to answer this question.A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population was such that 19% were under 20 years old, 14% were in the 20- to 35-year-old bracket, 33% were between 36 and 50, 23% were between 51 and 65, and 11% were over 65. A study done this year used a random sample of 210 residents. This sample is given below. At the 0.01 level of significance, has the age distribution of the population of Blue Valley changed?Under 20 20 - 35 36 - 50 51 - 65 Over 6529 27 67 65 22(i) Give the value of the level of significance. State the null and alternate hypotheses.H0: The population 10 years ago and the population today are independent.H1: The population 10 years ago and the population today are not independent.H0: The distributions for the population 10 years ago and the population today are the same.H1: The distributions for the population 10 years ago and the population today are different. H0: Time ten years ago and today are independent.H1: Time ten years…
- In a survey of 180 females who recently completed high school, 75% were enrolled in college. In a survey of 160 males who recently completed high school,70 % were enrolled in college. At a=.009, can you reject the claim that there is no difference in the proportion of college enrollees between the two groups? Assume the random samples are independent. Complete parts (a) through (e).Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1550 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 13 recent mileages of Citrus cars was taken. The mean of these 13 mileages was 1425 miles per month, and the standard deviation was 209 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.10 level of significance, can it be concluded that the mean recent monthly mileage, μ, of Citrus cars is less than 1550 miles per month? 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,…In 1965, about 44% of the u.s. adult population had never smoked cigarettes. A national health survey of 1360 u.s adults(selected randomly) during 2020 revealed that 626 had never smoked cigarettes. Using a=0.05, test whether there has been a change since 1965 in the proportion of u.s. adults that have never smoked cigarettes. State the hypothesis, list and check the conditions, calculate the test statistic, find the p-value, and make a conclusion in a complete sentence related to the scenario
- Data from the Department of Motor Vehicles indicate that 80% of all licensed drivers are older than age 25. In a sample of n = 50 people who recently received speeding tickets, 33 were older than age 25 and the other 17 were age 25 or younger. Is the age distribution for this sample significantly different from the distribution for the population of licensed drivers? Use alpha = .05. In a sample of n = 50 people who recently received parking tickets, 36 were older than age 25 and the other 14 were age 25 or younger. Is the age distribution for this sample significantly different from the distribution for the population of licensed drivers? Use alpha = .05.You are interested in testing if more than 46% of registered voters will vote for your preferred candidate in the next election. You managed to obtain a sample of 530 registered voters; 264 plan to vote for your candidate. Conduct the test and calculate and interpret the p-value; alpha is not provided.Prior to an intensive TV advertising campaign, the producers of Nike athletic shoes find that 29 of a random sample of 200 upper-income adults are aware of their new leisure shoe line. A second random sample of 300 such adults is taken after the campaign. Now 96 of the persons sampled can identify the new line. Is the increase in the proportion of upper income adults showing brand awareness significant? Test the claim using alpha = .05.
- Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven. The mean monthly mileage over the years for Citrus cars has been about 1600 miles per month. Recently, though, Citrus purchased thousands of new cars, and the company claims that the average mileage of its cars is now less than in the past. To test this, a random sample of 16 recent mileages of Citrus cars was taken. The mean of these 16 mileages was 1517 miles per month, and the standard deviation was 233 miles per month. Assume that the population of recent monthly mileages of Citrus cars is normally distributed. At the 0.05 level of significance, can it be concluded that the mean recent monthly mileage, μ, of Citrus cars is less than 1600 miles per month? 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,…The school registrar estimates that the dropout rate of freshmen high schools in Valenzuela is 20%. Last year, 90 freshmen from a random sample of 500 Valenzuela freshmen high school withdrew. At 0.01, is there enough evidence to reject the registrar's claim?An educator believes that the proportion of finance majors seeking to earn an MBA degree equals the proportion of management majors seeking to earn an MBA degree in the population. A random sample of 100 finance majors is taken and 24 indicate that they will seek to earn an MBA degree. Likewise, a random sample of 400 management majors is taken and 65 indicate that they will seek to earn an MBA degree. Using this information, test the educator’s claim at the 0.05 level
