A researcher used a sample of n = 20 individuals to determine whether there are any preferences among four brands of pizza. Each individual tastes all four brands and selects their favorite brand. If the data are evaluated with a chi-square test for goodness of fit using α = .05, then how large does the chi-square statistic need to be to reject the null hypothesis?

Q: A machine in a factory must be repaired if it produces more than 10% defectives in a day.  A random…

A:

Q: When conducting a chi-square goodness of fit test to examine whether the null hypothesis that there…

A: To find whether the given statement is true or false.

Q: A doctor claims that less than 30 percent of all per-sons exposed to a certain amount of radiation…

A: From the given information: The estimate of the proportion that are exposed to radiation feel ill…

Q: 4. Choose a random sample of 16 women (female (F)) from the list provided in table 1 , and use their…

A: On randomly selecting the 16 women , the data is given below in the table 121 124 113 110…

Q: A researcher is investigating the claim that the proportion of television viewers who identify one…

A: Given : A researcher is investigating the claim that the proportion of television viewers who…

Q: In a hypothesis test with the null and alternative hypotheses Ho: u 45, a random sample of 69…

A:

Q: A computer manufacturing company claims that its brand - A computers outsells its brand - by 10 % .…

A: Given data : x1= 40 n1= 200 x2= 18 n2= 100 significance level, 0.05

Q: 19. A local brewery produces three premium lagers named Half Pint, XXX, and Dark Knight. Of its…

A: 19. The brewery bottles 40% Half Pint, 40% XXX, and 20% Dark Knight. A sample of 80 consumers, 26…

Q: A corporation randomly selects 150 salespeople and finds that 66% who have never taken a self-…

A: Let p1 denotes the proportion of workers who have never taken a self- improvement course. Let p2…

Q: A Labrador retriever club has 130 members: 65 black Labs, 44 golden Labs, and 21 chocolate Labs.…

A: A chi-squared test of goodness of fit is suitable to be used in this situation.

Q: A manufacturing company designed a Factorial Experiment to determine whether the number of defective…

A: Hypothesis for interaction effect in factorial designs  H0: There is no intercation between the…

Q: A company claims they produce their mixed bag of candies so that, of the candies in the bag, 20…

A: Given Information:

Q: According to a recent report, 45% of college student internships are unpaid. A recent survey of 80…

A: a) Denote π as the true proportion of college students’ unpaid internship. It is reported that 45%…

Q: 4. Choose a random sample of 16 women ( female (F)) from the list provided in table 1, and use their…

A: There are two types of samples we can see in statistical inference, i.e small sample, and large…

Q: can you support the claim that the proportion of drivers who wear seat belts is greater in the South…

A: Given : x1= 404.0 n1= 490 x2= 279.0 n2= 380 significance level, 0.07

Q: A corporation randomly selects 150 salespeople and finds that​ 66% who have never taken a…

A: A corporation randomly selects 150 salespeople and finds that​ 66% who have never taken a…

Q: A newspaper article indicated that 43 percent of cars with black seats are white, 46 percent of cars…

A: Given: Total categories =k=4 Degrees of Freedom= k-1 =3 chi-square test statistic = 8.2

Q: A newspaper article contains the statement that, nationwide, 36% of all graduate students have a job…

A:

Q: A researcher did a one-tailed one-sample t-test to test the hypothesis that babies prefer the color…

A:

Q: A quality engineer is asked to determine whether less than 2% of all flasks received by its company…

A:

Q: It has been reported that 65% of the U.S. adult population play video games in their leisure time. A…

A: Given that  Sample size n =195 Favorable cases x =125 Sample proportion p^=x/n  =125/195 =0.6410

Q: Suppose a research study uses two independent groups with 21 individuals in each group. If a t-test…

A: The degrees of freedom is, df=n1+n2-2=21+21-2=40 The degrees of freedom is 40. Consider the test is…

Q: To find the t-obtained for an independent two-sample t-test, which step is not required?

A: Given 2-Sample Independent t-test

Q: A random sample of 802 supermarket shoppers determined that 378 shoppers preferred generic-brand…

A:

Q: A researcher is investigating the claim that the proportion of television viewers who identify one…

A: From the provided information, Level of significance (α) = 0.05 Test statistic χ2 = 8.95 The p value…

Q: It has been claimed that more than 40 percent of allshoppers can identify a highly advertised…

A:

Q: Many elementary school students in a school district currently have ear infections. A random sample…

A: Given X1=11 X2=12 n1=40 n2=30

Q: A manufacturer of baby powder claims that 20 out of 56 mothers prefer brand A of baby powder. A…

A: X=20, N=56x=8, n=25α=0.01

Q: 19. Step 3: Compute the test statistic -- relative discrepancies (fo-fe)² _ fe (use 3 decimal…

A: 19. The brewery bottles contains  40% Half Pint, 40% XXX, and 20% Dark Knight. A sample of 80…

Q: A medical researcher claims that 5% of children have asthma.In a random sample of 100 children 7.2%…

A:

Q: According to a recent report, 47% of college student internships are unpaid. A recent survey of 120…

A:

Q: A researcher is investigating the claim that the proportion of television viewers who identify one…

A:

Q: In a simple random sample of 250 patients needing surgery, 80 said they obtained a second opinion.…

A:

Q: how should a decision that fails to reject the null hypothesis be​ interpreted?

A: The dean of a major university claims that the mean number of hours students study at her…

Q: Of a random sample of 69 health insurance firms, 47 did public relations in-house, as did 40 of an…

A: health insurance firms are taken from group 1. casualty insurance firms are taken from group 2.…

Q: For a population with σ = 10, how large a sample is necessary to have a standard error that is: Less…

A: The standard deviation of the population is σ=10.

Q: 1. Choose a random sample of 16 women ( female (F) from the list provided in table 1, and use their…

A: Since we have to take sixteen female samples from the overall female samples and in a random manner…

Q: Due to a manufactoring error, three cans of regular soda were accidently filled with diet soda,…

A: The random variable X is defined as the number of cans containing diet soda. The variable X follows…

Q: A survey is conducted to determine if there is a difference in the proportion of students, parents,…

A: Given info: Since P-value is greater than any reasonable significance level, there is not convincing…

Q: 4. Choose a random sample of 16 women ( female (F) from the list provided in table 1, and use their…

A: One sample t-test: One sample t-test is used to test the significance difference between population…

Q: The mayor of a town has proposed a plan for the construction of a new bridge. A political study took…

A: Given information- Population proportion, p = 0.50 Sample size, n = 1400 Significance level, α =…

Q: A researcher is investigating the claim that the proportion of television viewers who identify one…

A: Solution: From the given information, the P-value is 0.03 and the level of significance is 0.05.

Q: A local brewery produces three premium lagers named Half Pint, XXX, and Dark Knight. Of its premium…

A: The number of categories (k) is 3.

Q: In a hypothesis test with hypotheses Ho :p > 0.76 and H1 : p < 0.76, a random sample of size 974…

A:

Q: In a food preference experiment, B0 lizards were given the opportunity to choose to eat one of three…

A: The hypothesis is, Null hypothesis: H0: The three different species of insects have equal population…

Q: A fast-food restaurant manager wants to know if more than 60% of her customers that request a water…

A: Solution: Let X be the number of customers filled the water cup with soda and n be the sample number…

Q: A company claims they produce their mixed bag of candies so that, of the candies in the bag, 20…

A: given that

Q: A manufacturing company designed a Factorial Experiment to determine whether the number of defective…

A: 1) The null and alternate hypothesis for a Factorial ANOVA are The number of defective parts…

Q: A Labrador retriever club has 130 members: 65 black Labs, 44 golden Labs, and 21 chocolate Labs.…

A: It is given that the number of members in a club is 130.

Q: A researcher wishes to see if the activities people usually do on a weekend which is listed below to…

A: Following data is given Activity Number of office workers Staying at home 37 Hiking 16 Yoga…