2) It is claimed that automobiles are driven on average more than 20,000 kilometers per year. To test this claim, 100 randomly selected automobile owners are asked to keep a record of the kilometers they travel. Would you agree with this claim if the random sample showed an average of 23,500 kilometers and a standard deviation of 3900 kilometers? Use a P-value in your conclusion.

Q: A study to compare two insurance companies on length of stay for pediatric asthma patients randomly…

A: Given Information: Insurer A: Sample size n1=393 Sample mean x¯1=2.31 Sample standard deviation…

Q: Using the following data on the Observations 10, 13, 4, and 20, confirm that the complete linkage…

A:

Q: Does quality of communication improve after people are married? Let’s consider a study by Olthoff…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: 1. In order to see the effect of different exercise programs on working memory performance,…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: Based on the hypotheses, find the following: Test Statistic = p-value = The p-value is Select an…

A:

Q: A magazine tested LCD televisions. The table below shows the overall quality score and cost in…

A: The null and alternative hypotheses for the test is as follows: H0: ρs= 0H1: ρs≠ 0 The correlation…

Q: How can I get the p-value of a right tail and two tails manually? from z-value Any example can be…

A:

Q: In the Marist Institute allergy survey, 2.5% of a national wide randomly selected sample of n = 880…

A: Given that: Sample size, n = 880 Sample proportion, p^=0.025

Q: The following table shows retail sales in drug stores in billions of dollars in the U.S. for years…

A: Given information- We have given the following table shows retail sales in drug stores in billions…

Q: (a) Write down the joint probability density function fx,y(x,y) of X and Y on its support. Answer:…

A:

Q: The data below shows car model and the color of vehicles sold at a Car dealership. Hyundai 20 Honda…

A: Solution:  The table of car model and the color of the vehicles sold at a car dealership is given.

Q: t most 59% of people support stricter gun laws. Express the null and alternative hypotheses in…

A: Given At most 59% of people support stricter gun laws.

Q: A psychologist would like to know whether the season (autumn, winter, spring, and summer) has any…

A:

Q: Total personal income of the country (in billions of dollars) for selected years from 1955 to 2000…

A:

Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…

A: From given data : p=0.79,x=198,n=235,α=0.05

Q: Part II. Perform the following: State the null and alternative hypothesis A. Complete the table. 1.…

A: Hypotheses: Null hypothesis: All the treatment means are equal. Alternative hypothesis: At least one…

Q: A study suggests that the 48% of 25 year olds have gotten married. You believe that this is…

A: given data, n=321x=143p^=xn=143321=0.4455claim :p≠0.48α=0.05

Q: Coef 20986 Age 339.28 Blood sugar 209.2 Blood pressure 207.2 Coef Constant SE 2912 71.95 179.3 225.4…

A:

Q: The Bureau of Labor Statistics reported that 16% of U.S. non-farm workers are government employees.…

A: Given n=65 P=0.16

Q: Q2: Placebo effect of exercise Imagine that Crum and Langer were able to repeat their study from Q1…

A: From the given information, the experiment has three groups: the Full treatment group, the Half…

Q: Kelly is a waitress and her average tip rate is 18%. After taking a sample of her tips from a week,…

A:

Q: 5. The proportion of people changing residence in the USA each year is 0.165. A researcher believes…

A: The formula of z-test statistic for proportion is given by, Ztest  = (p̂–p)/√[p(1–p)/n] Where, p =…

Q: A consumer products company is formulating a new shampoo and is interested in foam height (in…

A:

Q: The following table shows retail sales in drug stores in billions of dollars in the U.S. for years…

A: Regression line is used to predict the variable based on the another. It has two types of variables,…

Q: Based on the tables and graphs below, interpret and report the results. You need to identify the…

A: From the above scatter plot, we can see that the data points are scattered from the lower left…

Q: business analyst wants to determine if the prices of goods at a supermarket have changed gnificantly…

A: Solution: First we find mean and standard deviation for the difference score.  n=10 sample size…

Q: Based on their records, a hospital claims that the proportion, p, of full-term babies born weigh…

A: Given,sample size(n)=145population proportion(P)=0.36no.of babies born in the community who…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days…

A: From the provided information, Mean (µ) = 265 Standard deviation (σ) = 15 X~N (265,15)

Q: A service provider has 2 outlets. The price for a service in each outlet is €10. The chart below…

A:

Q: A simple random sample of size n = 50 is obtained from a population that is skewed left with µ=41…

A: The sample size n is 50.

Q: From 1987 to 2009, the number BB of federally insured banks could be approximated by…

A: It is given that, the time period corresponds to 1987 is 0.

Q: hypothesis will be used to test that a population mean equals 6 against the alternative that the…

A: Explanation: Here given hypothesis mean equal value and significance level find out the critical…

Q: A project manager is attempting to estimate the time that will be required to complete an initial…

A: Let X be the time taken to complete the initial assessment phase follows Uniform distribution with…

Q: An airline is charged by an airport based upon the total taxi-time that an airplane spends to take…

A: Given information: Taxi time, a at airport A is normally distributed with mean of 27 minutes and…

Q: QUESTION 1: Fifty women were asked which of the following gift items they prefer as a birthday…

A: Frequency distribution table:  We count the frequency every gift item and create table.  Gift…

Q: 23% of people mind if others smoke near a building entrance. A researcher thinks it has…

A: Given that p= 0.23 , X = 51, N = 100

Q: The table below show data that has been collected from different fields from various farms in a…

A: Let the independent variable X be the weight of the Raspberries Let the dependent variable Y be the…

Q: 2. The mean birthweight of an infant is thought to be associated with the smoking status of the…

A: Given the data from mothers divided into four categories according to smoking habits, and the…

Q: Classify the following variable as a qualitative or quantitative. Letter grade of an exam. O…

A: Qualitative variables: Qualitative variables measures of types and may be represented by a name,…

Q: According to a 2009 Reader's Digest article, people throw away approximately 80% of what they buy at…

A:

Q: 2) A company was experiencing a chronic weld-defect problem with a water-outlet-tube assembly. Each…

A: Let  x 0.29 0.104 0.207 0.145 0.104 0.124

Q: Let X represent the full height of a certain species of tree. Assume that X has a normal probability…

A: Given,mean(μ)=55.6standard deviation(σ)=9.4sample size(n)=239

Q: Suppose a simple random sample of size N equals 150 is obtained from a population who size is N…

A: Given that n =150 , p=0.6

Q: Determine and o u=78, o=18, n = 36 from the given parameters of the

A: Here, μ=78, σ=18, and n=36

Q: You invented an iPhone app. The mean time that users engage with this app is 8.2 minutes and the…

A: The mean is 8.2 minutes and the standard deviation is 1 minute.

Q: A researcher wants to know whether wastewater treatment facilities in their municipality are…

A: Since there are multiple sub-parts, as per the honor code the first three sub-parts will be solved.…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: GivenMargin of error(E)=2%=0.02confidence level=90%

Q: 3) The data below is for a sample of 12 'x' measurements from a normally distributed process:…

A: Given data: 1.85, 1.9, 2.01, 1.77, 1.82, 1.93, 1.75, 1.86, 1.99, 1.98, 1.69, 1.83 Sample size n=12

Q: 2. In a recent study on world happiness, participants were asked to evaluate their current lives on…

A: Given Mean=5.4 Standard deviation=2.2

Q: Suppose that ? = the mean daily income that the attendant is giving to the company this year. What…

A: given data  null hypothesis is :  μ≥$800 we have to find alternative hypothesis.