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General population is skewed to the right, the mean degree of affection is 60, Standard deviation is 16. Sample 100 fathers with a mean of 64.5. What is the research hypothesis?
Suppose a manufacturing company makes a certain item. The time to produce each item is normally distributed around a mean of 27 minutes with a standard deviation of 2.5 minutes. Thus, the populatio
Use a .01 significance level to test the claim that the sample is from a population with a standard deviation equal to 28.866 cents. If the amounts from 0 to 99 cents are equally likely, is the requ
California (based on data from SigAlert). This simple random sample was obtained at 3:30 p.m. on a weekday. Use a .05 significance levelto test the claim that the sample is from a population with a
ID the null and alternative hypothesis. What is the Test statistic What is the P value What is the Critical Value What is your final conclusion?
Suppose sigma x=$155. Assume that these 65 dog owners are representative of all dog owners in terms of amount spend on their dogs in a year. Calculate the z-statistic (round 2 decimals)
Listed below are speeds (mi/h) measured from southbound traffic on I-280 near Cupertino, California (based on data from SigAlert). This simple random sample was obtained at 3:30 p.m. on a weekday.
Use a .05 significance levelto test the claim that the sample is from a population with a mean that is less than the speed limit of 65 MPH.
The weights in pounds of discarded plastic from a sample of households summary statistics are n=62, x=1.911, s=1.065, use a .05 significance level to test the claim that the mean weight of discarded
The mean number of errors per page made by a member of the word processing pool for a large company is thought to be 1.5 with the number of errors distributed according to a Poisson distribution.
In basketball, a player's Free Throws Percentage (FT%) is expressed as a number between 0 and 1, which represents the proportion of free throw attempts that are successful.
Assume that these 65 dog owners are representative of all dog owners in terms of amount spend on their dogs in a year.
Students in an introductory statistics class were asked to report the age of their mothers when they were born. Summary statistics include
Where x is the number of hours slept by each employee. Find a 95% confidence interval estimate for the average number of hours each employee sleeps at night. Be sure to include critical values
The roll of a pair of dice has the following probability distribution, where the random variable is the sum of the values produced by each die: Calculate the expected value of x.
Magic Valley Memorial Hospital administrators have recently received an internal audit report that indicates that 15% of all patient bills contain an error of one form or another. After spending con
Suppose John randomly selects a 1,200-word passage. Assuming that the Poisson distribution applies, if the computer error rate is actually 3 errors per 400 words, determine the probability that no e
The route used by a certain motorist in commuting to work contains two intersections with traffic signals. The probability that he must stop at the first signal is 0.44, the analogous probability fo
Weighing bean seeds. Biological measurements on the same species often follow a Normal distribution quite closely. The weights of seeds of a variety of winged bean are approximately Normal with mean
A tennis player has a 68 percent succes rate on first serves and migt serve 85 times in a match. Assuming that each serve is independent from another is a normal model acceptable and why?
What is the state space S of stochastic process {Xn; n >= 0}? Explain why {Xn; n >= 0} is a Markov chain. Write down the transition matrix of {Xn; n >= 0}, and draw the transition diagram of
What is the overall probability a patient tests negative? What is the probability a patient that tests negative is truly free of the virus?
Individuals filing federal income tax returns prior to March 31 received an average refund of $1056. Consifer the population of "last-minute" filers who mail their tax return during the last five da
Mary is deciding whether to book the cheaper flight home from college after her exams, but she's unsure when her last exam will be. she thinks there is a 30 percent chance the exam wil be scheduled