what would be a good hypothesis for calculating the average speed for cars

Q: Freight Train Cars In a train yard there are 5 tank cars, 4 boxcars, and 10 flatcars. How many ways…

A: 5 tank cars 4 boxcars 10 flatcars How many ways can a train be made up consisting of 3 tank cars, 3…

Q: Heights of boys Heights of girls + 60 61 62 63 64 65 66 67 68 69 70 O The height of boys has less…

A: Box plot consist 5 points : {minimum, first quartile, second quartile (median), third quartile,…

Q: Test the claim that the proportion of men who own cats is larger than 20% at the .01 significance…

A: given data,claim :p>0.20α=0.01we have to find out the  correct option for  the null and…

Q: insider the following sample of observations on coating thickness for low-viscosity paint. 0.83 1.42…

A:

Q: (b) Find the correlation between X and Y when you are told that the expectations are E (X) = 0.95…

A: From the given information, x|y 0 1 2 0 0.1 0.2 0.1 1 0.1 0 0.15 2 0.2 0.05 0.1…

Q: 1. A melting point test of n=16 samples of a binder used in manufacturing rocket propellant resulted…

A: From the provided information, n=16x=198.5σ=4α=0.05

Q: You may need to use the appropriate appendix table or technology to answer this question. Barron's…

A: For the distribution of no. of weeks of unemployment, it is given that: mean, μ=16.5standard…

Q: 2. Simultaneous distribution: We consider two random variables X and Y with simultaneous probability…

A: Given information: x|y 0 1 2 Total=P(x) 0 0.1 0.2 0.1 0.1+0.2+0.1=0.4 1 0.1 0 0.15…

Q: According to government data, 22% of American children under the age of 6 live in households with…

A: Given Information: 22% of American children under the age of 6 live in households with incomes less…

Q: 4. Probability maximization: We have independent random variables X and Y with distribution X…

A:

Q: At a particular university, students' grades in introductory statistic classes are generally…

A: Given that: Population mean, μ=63 Population standard deviation, σ=16.9

Q: Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and…

A: From given data we have : P(Z>z)=0.8869

Q: factory received a shipment of 49 generators, and the vendor who sold the items knows there are 7…

A: 7 defective42 non defective____________________49 total shipments

Q: A consensus forecast is the average of a large number of individual analysts; forecast. Suppose the…

A: given data  normal distribution μ = 5 %σ = 1.2%

Q: Suppose there are two independent events A and B. We have P(A) = 1/3, P(A∪B) = 1/2. What is P(B)?

A: Two events are A and B.

Q: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…

A: Given that We have to find the 95% confidence interval for the population mean  And At what sample…

Q: 7.14 STUDENT GOVERNMENT ELECTION A student running for a position in student government believes…

A: Given: The student believes that 55% of the student body will vote for her. n = 200 students show…

Q: A manufacturer produces humidifiers that have a mean life of at least 18000 hours when the…

A:

Q: What is the future value of this cash flow stream: $100 at the end of 1 year, $150 due after 2…

A: Since we know that formula for future value is given by Future Value = P(1 + r)n Where, P = Present…

Q: 5. Which estimator is best?: A political party finances its activities through a lottery. The…

A: Given information: The probability of winning in the first, second, and third rounds are ϕ, 2ϕ, and…

Q: Calculate the z score given the following information: x=20 mean = 15 SD = 5

A: We have given in the question: x=20mean=μ=15standard deviation σ=5

Q: As an example of a situation in which several different statistics could reasonably be used to…

A: first we find mean : Y¯=279+696+515+221+1145=365X¯=279+531+515+221+1755=344.2D¯=0+165+0+0-615=20.8

Q: The mean starting salary offered to graduating students with a certain major in a recent year was…

A: given data normal distributionμ  = 64275σ = 3712n = 85P(x¯≥64000) = ?

Q: (b) Compute a 95% CI for the mean white blood count (in thousands) (use the variable named "First…

A: The data for white blood count is given as-     1 9 2 6 3 13 4 5 5 10 6 5 7 7 8…

Q: 600 baseball fans in Boston are asked whether they hate the Yankees. 564 of them answered "yes".…

A: 600 baseball fans in Boston are asked whether they hate the Yankees. 564 of them answered "yes".…

Q: 2. The original default rate on the sample of 135,000 cardholders was extremely high at…

A: Given:-           The original default rate on the sample of 135,000 cardholders was extremely high…

Q: Fruit flies are used frequently in genetic research because of their quick reproductive cycle. The…

A: Givensample size(n)=49Mean(x)=0.8004standard deviation(sx)=0.0782confidence level=90%

Q: the increased number of small commuter planes in major airports has heightened concern over air…

A:

Q: The expected proportions of colors of M&Ms according to the Mars candy company can be found in the…

A: Given data:   blue brown green orange red yellow Total Observed Frequencies 478 363 481 537 371…

Q: = You are performing a Chi-Square test with a level of significance of a 18, find the critical value…

A: Givenα=0.94Degrees of freedom(df)=18

Q: The current U.S. population is about 330 million people.  There are about 140 million houses in the…

A: Given information- We have given the current U.S. population = 330 million people Number of houses…

Q: Lung cancer is the leading cause of cancer‑related deaths in the United States. Researchers examined…

A: Given :  3% of heavy smokers develop lung cancer  CT scan positively identifies lung cancer = 89%…

Q: A recent survey examined the use of social media platforms. Suppose the survey found that there is a…

A: Given that, The event F is a person uses Facebook The event L is a person uses LinkedIn…

Q: Selecting Players How many ways can 4 baseball players and 5 basketball players be selected from 12…

A: 12 baseball players and 15 basketball playersselect 4 baseball players and 5 basketball playersno.…

Q: (b) Implement the test in part (a) and provide a two-tailed p-value. (Use an approximate method if…

A: Given data: 4-year LVM Baseline LVM Change 162 138 24 127 133 -6 141 85 56 97 99 -2…

Q: For women age 25 and over in the U.S. in 2002, the relationship between age and education level…

A:

Q: The following table shows students’ test scores on the first two tests in an introductory biology…

A:

Q: 2.1 The PSA blood test is designed to detect prostate cancer. Suppose that of men who have this…

A: P(− | C) = 1/4 is true, which means that the test fails to detect prostate cancer in 1 in 4 men who…

Q: PC Gaming: A computer magazine editor claims that the mean cost of a gaming computer is $1250. A…

A: Here the given information is computer magazine editor claims that the mean cost of a gaming…

Q: Assume the resting heart rates for a sample of individuals are normally distributed with a mean of…

A: normal distribution μ = 70σ = 5 EMPIRICAL RULE : approximately 68-95-99.7% data fall within 1σ-2σ-3σ…

Q: Suppose at a local dentist office is open 7 days a week and an average of 84 patients are seen in a…

A: The random variable X is patients seen in a week. The average number of patients seen in a week is…

Q: 2. For a population with a mean of 45 and a standard deviation of 10, what is the standard error for…

A: The mean is 45 and the standard deviation is 10.

Q: A manufacturing company wants to see if there is a significant difference in three types of plastic…

A: Given that: Sample Mean Sample Size High-Density Polythene 38.5673 11 Low-Density Polythene…

Q: Let x be the number of courses for which a randomly selected student at a certain university is…

A: Given Data : Since you have posted a question with multiple sub parts, we will provide the solution…

Q: Find the standard deviation for the sampling distribution of the sample proportion with (i)  n=100…

A: i) Suppose p is the population proportion.

Q: Next to each variable, state what the variable represents in statistics, be specific. X = P= 0= X=…

A: X = The sample drawn from the population μ = Population mean σ = Standard deviation of the…

Q: L. Winston Martin (an allergist) has an excellent system for handling his regular patients who come…

A: a. We can use the M/M/1 queuing model to find the expected number of patients in the system. The…

Q: Observed and Theoretical PMF of Asteroid Impacts 1.58-2.00 km in Diameter over 2000000 Years…

A: Given:-           Based on the chart, what is the mean number of impacts in a 2,000,000-year period…

Q: Internet Service Providers The amount that households pay service providers for access to the…

A: For the distribution of internet service fees (which is stated to be not normal), it is given that:…

Q: Suppose a test is to be performed of H₁: = 39 versus H₁:39 at the α = 0.05 significance level. A…

A: Given information Hypothesized mean µ = 39 Sample size (n) = 23 Mean x̅ = 41.1 Standard deviation…