company claims that 50% of their customers prefer product A, 30% prefer product B, and 20% prefer product C. To test this claim, a random sample of 100 customers was taken, and it was found that 50 customers prefer product A, 30 customers prefer product B, and 20 customers prefer product C. Using a 0.05 level of significance, perform a chi-square goodness-of-fit test to determine whether the company's claim is supported by the sample data.

Q: A television executive claims that the percent of households that watch the Macy's parade on…

A: The null and alternative hypothesis is given by,H0:P=0.65Ha:P<0.65 Given: n=171, x=households…

Q: The p-value for this test is: ( round to 4 decimals)

A:

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A: Given: x = 27 n = 80 p0 = 0.3 α = 0.10

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A:

Q: O Alternative hypothesis states: population proportion > 11 a. O Alternative hypothesis states:…

A:

Q: One study claimed that 86% of college students identify themselves as procrastinators. A professor…

A:

Q: A college administrator wanted to know if the proportion of students who request online classes, lab…

A: Answer:  Given that, n=250 xn2=4.01 P-value = 0.1347 α=0.05

Q: Random and independent samples of 900 unmarried people and 1200 married people were asked if they…

A: Let, X1: The unmarried people who believes that a good diet is very important to good health. X1:…

Q: Refer to Exhibit 1. The mean square between treatments is O 16350 8750 O 475 O 2916.67

A:

Q: A health organization asserts that the prevalence of smoking among male adults 18 years or older in…

A: The test hypotheses are: Null hypothesis: H0: p1 = p2 Alternative hypothesis: Ha: p1 > p2. Test…

Q: In a random sample of 550 women, 66% favored stricter gun control laws. In a random sample of 270…

A:

Q: A study is conducted to determine whether there is a difference in the mean scores of Collin County…

A: Given Information: A study is conducted to determine whether there is a difference in the mean…

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A: It is provided that there are three groups for which the number of observations in each group are nA…

Q: A manufacturer claims him market share is 60%.However a random sample of 500 clients show that only…

A: The objective of this question is to test the manufacturer's claim that his market share is 60%…

Q: In a random sample of​ males, it was found that 24 write with their left hands and 226 do not. In a…

A: State the hypotheses. Let p1 denotes the proportion rate of left handedness in males. Let p2 denotes…

Q: determine if the average travel time of all the university's students differed from 20 minutes. Find…

A: It is given that  Claim: The average travel time of all the university’s students differed from 20…

Q: Number of Fine Lines and Wrinkles Before 12 14 13 11 15 11 15 9 13 After 10 13 13 10 8 12 12 14 10 9…

A: Given : The manufacturer of a new eye cream claims that the cream reduces the appearance of fine…

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Q: In a randomized study, the use of chewing gum during studying was used to see if increased a test…

A: Given, n1 = 90 x1 = 78 n2 = 166 x2 = 131   p1 = x1n1 = 7890 = 0.8667p2 = x2n2 = 131166 = 0.7892…

Q: A national publishing house claims that 35% of all weekly magazine readers inSouth Africa read their…

A: Null Hypothesis: H0: The proportion of all weekly magazine readers in South Africa read their…

Q: A student at a local high school claimed that three- quarters of 17-year-old students in her high…

A: Information given below Hypothesis Ho: p=0.75 vs H1: p≠0.75  P value=0.9315  Level of significance…

Q: A researcher wants to know whether athletic men are more flexible than nonathletic men. For this…

A: The given sample size for athletic men is 50, sample mean is 4.3, sample standard deviation is 2.1,…

Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…

A:

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A:

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A: Chi square test is used to determine the independence of variables in the data set. There are four…

Q: The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and…

A:

Q: The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and…

A: According to the given information in this question We need to apply paired t test

Q: A manufacturer claims him market share is 60%. However a random sample of 500 clients show that only…

A: X=275, n=500, p=60%, level of signicance=1%

Q: What are the null and alternative hypotheses? Họ: | versus H,: (Type integers or decimals. Do not…

A: Given : Proportion of respondents who stated they talk to their pets on phone = 0.45 Sample size =…

Q: In the US,  44.5% of all people have type O blood,  39.3% have type A blood, 11.5% have type B blood…

A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of millionaires with blood groups O,…

Q: The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and…

A:

Q: A nutrition expert claims that the average American is overweight: To test his claim, a random…

A: A. Consider μ is the population average difference of actual weight and ideal weight.

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A: Note: Since we are authorized to answer only up to 3 subparts, we are answering first three…

Q: The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and…

A:

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

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