what is the nully hypothesis and alternative hypothesis

Q: What kind of metrics are the Akaike (AIC), Schwartz (BIC) and Hannan-Quinn statistics? What does the…

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Q: ACTIVITY. From the table below, determine the relationship between number of Facebook friends and…

A: Given information: X Y X^2 Y^2 XY 3889 239 15124321 57121 929471 4999 576 24990001 331776…

Q: Decide which of the following statements are True.  A.For any normal distribution, the mean,…

A: Normal distribution are symmetric about mean.

Q: Studies have shown that stress and consumption of a poor diet can impact learning and memory. I want…

A: Solution Given

Q: Test the claim that the mean GPA of night students is larger than 3.2 at the 0.025 significance…

A: Consider that μ is the mean GPA of all night students.

Q: A population of values has a normal distribution with μ=201.4 and σ=41.3 You intend to draw a random…

A: A population of values has a normal distribution with μ=201.4 and σ=41.3  n=77

Q: The third worksheet labeled sample B is a simple random sample with replacement, with seven…

A: From the provided information, Population standard deviation of the random variable X is 4. That is…

Q: Given the probability Venn diagram below for the two Events A and B find the probabilities: - Pr( A…

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Q: 1. A consumer watch group interviewed a random sample of 1000 consumers and asked them if they are…

A: Here use confidence interval for population proportion

Q: R is a Binomially distributed Random Variable such that r~ B(10,0.4 Which of these statements are…

A: 16 Given information: R is Binomially distributed random variable with B(10, 0.4) That is, n=10 and…

Q: Ralph’s Gas Station is running a giveaway promotion. With every fill-up of gasoline, Ralph gives out…

A: It is given that n=7 and p=0.25.

Q: Use the z-score formula, z=x−μ/σ , and the information below to find the value of σ. Round your…

A: Ans- Find the value of σ.      Given  z=−1.90, x=14.12, and μ=19.44

Q: 1. 12 P(X = x) 0.25 0.50 0.05 0.20 3.

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Q: The surface of a circular dart board has a small center circle called the bull's-eye and 20…

A: Given If a person hits the bull's-eye with probability 0.01 hits a double with probability 0.10,…

Q: This question asks you to extend the medical-test example from class. Suppose there is a medical…

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Q: One study of grand juries in Alameda County, California, compared the demographic characteristics of…

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Q: Example 13.14 A survey of 200 firms found the following evidence regarding profitability and marker…

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Q: Exampie 13.15) Five coins are tossed 3,200 times and the number of heads appearing each time is…

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Q: What is the TSS of the model?

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Q: With the regression equation Y′=a+bX, the value we are trying to predict is represented by  Y' a b…

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Q: 1. If the random variable X follows a binomial distribution with n = 5 and p = 0.8. a) What is the…

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Q: 7.S.6 A plant physiologist conducted an experiment to determine whether mechanical stress can retard…

A: Given:

Q: ou are conducting a multinomial hypothesis test for the claim that the 4 categories occur with the…

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Q: The data show the scores of the winning teams in the Rose Bowl. Construct a frequency distribution…

A: Given : No. of Observation = 40 47 30 23 26 26 36 40 22 30 39 36 47 25 36 48 23 19 19 19…

Q: Topic : Housing prices Pose 1 question for the topic • Answering your question must: o Involve…

A: Objective: To come up with a question that will involve collecting, organizing, analysing and…

Q: 9. The chief executive of Rex Cars wants to investigate the relationship between the number of new…

A: The independent variable is Cost of advertising. The dependent variable is Number of new car sales.…

Q: 2. A random sample of 21 passenger cars at a gasoline station shows that the average volumie or…

A: Hypothesized population mean = 0.7 Sample standard deviation = 1.6 Sample size = 21  sample mean =…

Q: Use the z-score formula, z=x−μ/σ , and the information below to find the value of σ. Round your…

A: According to the given information, we have Mean = 20.35 Raw score = 11.44 Z score = -3.30

Q: recent study indicated that 29% of the 100 women over age 55 in the study were widows. A.) How large…

A: The random variable X follows normal distribution. We have to find the sample size with the…

Q: ractions over the week is shown in the following grouped frequen

A: Given data, What is the class width?

Q: _1. The ratio of the number of favourable outcomes and the total number of possible outcomes…

A: Given some problems using basic rules of probability.  We have to find the answers of all the…

Q: 24. A political pollster plans to conduct a survey to determine the proportion p of all Americans…

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Q: If the mean and variance are computed for each sample in an independent-measures two-factor…

A: The mean and variance are computed for each sample in an independent-measures two-factor experiment.

Q: How many degrees of freedom do you have in this test? O1 3

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Q: Q18. If x ~ N(100, 25) and a random sample of x of size 16 is obtained. What is the standard…

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Q: In a random sample of five mobile devices, the mean repair cost was $80.00 and the standard…

A: Given Sample=5 Mean=80 Standard deviations=14

Q: In a two-factor analysis of variance a main effect is defined as the ____. a. mean differences…

A: We have given that,  In a two-factor analysis of variance a main effect is defined as the... ?  We…

Q: 10. Entry to University of Limpopo is determined by a national test. The scores on this test are…

A: Given that Mean = 500 ,s.d =100 ,p value =0.70

Q: stion 0

A: No, the answer is 0.79

Q: Example 14.1 Suppose there are three groups of students with marks (given out of 20) as shown in…

A: Anova is used to test the mean significance between the three or more groups. It is a type of…

Q: The first worksheet labeled sample A (in the Excel file linked below the exam) is a sample of n=50…

A: Given:

Q: What does the Ljung Box Q test test for ?

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Q: Over time a retailer has determined that 20% of all customers entering the store will make a…

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Q: Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval…

A: Given,n=322x=48sample proportion(p^)=xnsample…

Q: Determine whether each of the following experiments/situations involve a discrete or a continuous…

A: A discrete random variable: Its value is obtained by counting.  A continuous random variable: Its…

Q: This q Use a t-test to test the claim about the population mean u at the given level of significance…

A: As per company guidelines I solved exactly three subparts of the question.thank you .

Q: one city, 79.6% of the 8500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given n=8500

Q: Trials in an experiment with a polygraph include 96 results that include 23 cases of wrong results…

A: Given that  Sample size n =96 Favorable cases x =73 Sample proportion p^=x/n  =73/96 =0.7604

Q: B1. (a) The unfinished Histogram and Frequency Table give information about the times, in hours,…

A: Histogram is an appropriate diagram for representing the frequency distribution of a continuous…

Q: Assume that you reject the null hypothesis of no-difference at a=0.05. This means that you…

A: For the given select the correct choice