A machine produces parts that are either good (80%), slightly defective (10%), or obviously defective (10%). Produced parts get passed through an automatic inspection machine, which is able to detect any part that is obviously defective and discard it. What is the quality of the parts that make it through the inspection machine and get shipped?

Q: Nationally, the proportion of red cars on the road is 0.12. A statistically-minded fan of the…

A: The following hypothesis can be formed

Q: A research report concludes that there are significant differences among treatments, with "F(3,28) =…

A: Given: A research report concludes that there are significant differences among treatments, with…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A:

Q: snip

A: Groupthink refers to the conditions under which a group of individuals reach to a conclusion without…

Q: Before the Christmas shopping rush began, a department store had noted that the percentage of…

A:

Q: A purchaser of alarm clocks buys them in lots of size 10. It is his policy to inspect 3 clocks…

A: Define the Events, A : The lot have 4 defectives B : The lot have 1 defective C : The lot purchaser…

Q: It is not exposed to the factor under consideration and all other external influences are held…

A: When a treatment is applied to a group and results are obtained after the treatment, then the method…

Q: A recent survey of a social media site user statistics had four categories (reasons) for using the…

A: Given information- We have given a result of a recent survey of a social media site user statistics…

Q: Suppose that you are interested in determining whether the advice given by a physician during a…

A: (a)   Obtain the value of true difference in the population proportion p1–p2.   The value of true…

Q: Which concrete is best sold where? The marketing team of an engineering firm noticed that some of…

A: Given, The marketing team of an engineering firm noticed that some of their concrete products are…

Q: A stock index consists of businesses in both Europe and the United States. Assume that each business…

A: Given the probability that American business makes a profit = 90% = 0.90 Given the probability that…

Q: A researcher randomly selected 100 adults aged 18-25 and 100 adults aged 50-60. Within each age…

A: Given, A researcher randomly selected 100 adults aged 18-25 and 100 adults aged 50-60. Within each…

Q: Rick Douglas, the new manager of food Barn, is interested in the percentage of customers who are…

A: Given, The hypothesis to be tested here is- This is a two tailed test.

Q: Researchers want to determine whether all bags of Skittles® have the same proportion of colors…

A: The given data is shown below: Flavor Color Red Orange Yellow Blue Green Original 15 20 18 12…

Q: A labour analyst surveys a random sample of 40 females and 40 males who are currently not working…

A:

Q: IN A CITY 250 MEN OUT OF 750 WERE FOUND TO BE SMOKERS. DOES THIS INFORMATION SUPPORT THE CONCLUSION…

A:

Q: Trichotillomania is an illness characterized by the repeated urge to tear out hair, eyelashes,…

A: In Graph I, It can be seen that the no. of hairs is reducing. Therefore, Graph I is presented by the…

Q: In a random sample of 80 Americans, 55% wished that they were rich.  In a random sample of 100…

A: Given : p1 = 0.55p2 = 0.48n1 = 80n2 = 100 p1 = x1n10.55 = x180x1 = 44 p2 = x2n20.48 = x2100x2 = 48

Q: An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the…

A:

Q: In carrying out chi-square analysis, if one or more of the observed frequencies is less than five…

A: Given statement: In carrying out chi-square analysis, if one or more of the observed frequencies is…

Q: University is considering changing the email system that they currently use. Since there are…

A: We have to find hypothesis..

Q: The University is considering changing the email system that they currently use. Since there are…

A: Solution: No. of users of current system: n1 = 131 No. of users that like the current system: x1 =…

Q: 3. In a study done in Michigan, it was determined 38 (out of 62) poor children who attended…

A: given that

Q: In a study at Quaid-i-Azam University, it is reported that seven percent student play football,…

A: Let event A represent students who play football and event B represent students who play cricket.…

Q: A team physician has determined that of all the athletes who were treated for minor back pain, 72%…

A: Let the number of athletes be 100. The Venn diagram can be obtained as shown below: The number of…

Q: The quality department at an electronics company has noted that, historically, 92% of the units of a…

A: Given that

Q: Two different types of injection-molding machines are used to form plastic parts. A part is…

A: a) Given information: n1=300 n2=300 x1=16 x2=8…

Q: The University is considering changing the email system that they currently use. Since there are…

A: We have to find null and alternative hypothesis for given data..

Q: A county environmental agency suspects that the fish in a particular polluted lake have elevated…

A: Given data: n1 = 5, n2 = 4 Sample I(From Polluted Lake) 0.523 0.723 0.523 0.623 0.523 Sample…

Q: A researcher wants to know why individuals in Community A have a higher rate of a rare form of…

A: Descriptive study A descriptive research is one in which data is gathered without causing any…

Q: 4. In a survey of families in which both parents work, one of the questions asked was, “Have you…

A: Solution: 4. Let p1 be the proportion of men has refused a job, promotion, or transfer and p2 be the…

Q: 4. Which kind of study is generally more effective at blocking confounders?

A: Concept of confounding is important in statistical analysis.

Q: 2. A study found that 60 percent of college students say they are housing insecure, while 18 percent…

A: Given:- A study found that 60 percent of college students say they are housing insecure, while 18…

Q: How many independent variables entered in the overall model and was/were not able to enter? What is…

A: We have given that the summary data in table form of the model.

Q: Among students at a nearby college, the proportion who say they’re interested in their congressional…

A:

Q: A hearing specialist conducts a study on hearing loss at certain frequencies among a group of…

A: Topic - venn diagram and sets

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: Population proportion , p = 0.23 Sample size , n = 1680 Favorable courses , x = 436 Level of…

Q: The quality department at an electronics company has noted that, historically, 96% of the units of a…

A:

Q: How would you conduct a sample of people in your community so that you could see which flavors are…

A: Suppose that you want to know which flavors of ice-cream from among chocolate, vanilla, mango and…

Q: A university counselor believes that hypnosis is more effective than the standard treatment given to…

A: There are two types of tests in the hypothesis. 1.parametric test and 2.Non parametric test. If the…

Q: Will improving customer service result in higher stock prices for the companies providing the better…

A: Will improving customer service result in higher stock prices for the companies providing the better…

Q: The University is considering changing the email system that they currently use. Since there are…

A: Formula   Test statistic

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Solution: Given information: n1= 115 Sample size of new engine x1= 12 new engine failed n2= 120…

Q: A company claims that its brand of dish detergent, A, is more effective than a competitor’s brand,…

A: The correct inferential procedure for a test is dependent on multiple considerations.

Q: An organization published an article stating that in any one-year period, approximately 7.5 percent…

A: Hypothesis Testing: It is basically a comparison of the statistical measures of the data with one…

Q: One thousand articles from a factory are examined and found to be three percent defective. Fifteen…

A: 9. Let p1 denotes the proportion of defective for first factory, and p2 denotes the proportion of…

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.