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How many pups out of a litter of 5 must develop hip problems for the police department to take action against this breeder with 95% confidence that she is guilty?
If roll single die on a checkerboard with equal number of shaded and unshaded squares, what is probability of landing on shaded with 4, 5, or 6 heads up?
Air-America has a policy of booking as many as 14 people on an airplane that can seat only 12. (Past studies have revealed that only 92% of the booked passengers actually arrive for the flight.) Usi
Suppose the business owners in the sample do as they plan. Compute the p-value for a hypothesis test that can be used to determine if the proportion of business owners providing holiday gifts has de
Three professors at Northern Kentucky University compared two different approaches to teaching courses in the school of business. Describe the sample that was collected.
Suppose 86 different survey organizations take simple random sample of 100 persons in the town. Each organization gets a 90% confidence interval. About how many of these intervals should cover the p
A Florida Beach resort hotel has 150 rooms. In the spring months, hotel room occupancy is approximately 80%. What is the probability that 115 or fewer rooms are occupied on a given day?
What is the advantage of using the normal probability distribution to approximate the binomial probabilities? Use part (d) to explain the advantage.
The average number of television sets in the sample households turns out to be 1.86, and the SD is 0.86. Find a 95% confidence interval for the average number of television sets per household.
the manufacture of a new compact car claims the miles per gallon (mpg) for the gasoline consumption follow a normal distribution with mean of 25.9 mpg and standard deviation of 9.5 mpg . if 36 such
For borrowers with good credit scores, the mean debt for revolving and installment accounts is $15,000. What is the probability that the debt for a borrower with good credit is more than $17,400?
Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error.
Savings accounts are considered to be normally distributed with a standard deviation of $1,250, what sample size would be necessary at a 90% confidence level to determine the same?
A random sample of 41 apartment complexes yielded a mean of $310 with a standard deviation of $29. Construct a 90% confidence interval for the mean cost of one-bedroom apartments in Denton, Texas.
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours? I know the a
30% of restaurants are in violation if a inspector selects five what is the probability it is in violation.
Last week Sarah had exams in Math and in Spanish. On the math exam, the mean was m = 40 with s = 5, and Sarah had a score of X = 45. On the Spanish exam, the mean was m = 60 with s = 8 and Sarah had
f F(3, 60) = 4.13, p = 0.04, and α = 0.01, is the result statistically significant? Provide a rationale for your answer. Would the null hypothesis be accepted or rejected?
Conduct a crosstabs analysis to examine the proportion of female high school students who take advanced math courses is different for different levels of the parent variable.
Experience has shown that the times follow a normal distribution, and the standard deviation of the population is known to be 1.2 minutes. Based on this week's sample, construct a 90% confidence int
For an examination in which grades of 70 and 88 correspond to standard scores of -0.6 and 1.4 respectively. Find
In a job shop there are five lathes which produce automotive components. What percentage of the time does a lathe produce more than 27 components per hour?
The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples
a recent study of cardiovascular risk factors reports that 30% of adults meet the criteria of hypertension. if 15 adults are assessed, what is the probabiliy that?
Dylan Jones kept careful records of the fuel efficiency of his new car. Compute the 95 percent confidence interval for his mpg.