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An ad is placed in newspapers in four counties asking for volunteers to test a new medication for reducing blood pressure. The number of inquiries received in each area is as shown here.
How does the ANOVA technique avoid the problem of the inflated probability of making Type I error that would arise using the alternative method of comparing groups two at a time using the t-test fo
Can the research conclude that the medication has a significant effect on mental alertness as measured by the driving simulation task? use a two tailed test with alpha =0.05. Compute cohen's d to me
A testing device is claimed to have high reliability insofar as: P[A/B]=P[Acomplement/Bcomplement] =p where A=device indicates component is faulty and B=component is faulty. Suppose 5% of components
The Bank's goal is to reduce the number of tellers and teller hours as a way of cutting costs and maximizing profits. The Bank still needs to have adequate staffing for its non-internet customers, s
Create a decision tree to represent this situation. If he goes to court, what is the probability that he will win the full amount? What is the probability that he will win the reduced amount? What i
Calculate the estimate for the standard error of difference between two independent means for s12 = 20, s22 = 10, n1 = 11, and n2 = 30. (Give your answer correct to two decimal places.)
An experiment was designed to estimate the mean difference in weight gain for pigs fed ration A as compared with those fed ration B. Eight pairs of pigs were used.
Find the 95% confidence interval for estimating ?d based on these paired data and assuming normality. (Give your answers correct to one decimal place.)
A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 stud
Use a standard deviation = 30 mg/dL and find a 99% confidence interval for the average cholesterol level of all children whose father has had a heart attack with cholesterol level above 250. (Please
The amount of time it takes adults to fall asleep at night is approximately normally distributed with a mean of 23.45 minutes and a standard deviation of 7.01 minutes.
A politician claims that she will receive 63% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 55 of those sampled will vote for her. I
A set of blocks painted three colors is on a table in front of you, some in bag 1 and some in bag 2. The colors are blue, brown, and green. There are some of each color in both bags. Is the choice o
Moreover, the correlation between male and female life expectancies was found to be 0.95. Use this information to estimate female life expectancy in a country where the male life expectancy is 62.8
The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2500 miles. What is the probability
The business college computing center wants to determine the proportion of business students who have laptop computers. If the proportion exceeds 35%, then the lab will scale back a proposed enlarge
A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful only if the average ti
Of those, 48 couples were divorced or had filed for divorce within the first year of marriage. Is there sufficient evidence to show a difference between divorce rates in Illinois and California duri
Construct a 99% confidence interval for the proportion of all bank customers that use online banking.To obtain a margin of error of 2% for the confidence interval in part a., what sample size would
Using the sample size from part a., construct a 90% confidence interval for the mean price of an exotic golf vacation. Assume that the sample conducted above in a revealed a sample mean price of $3,
The mean and max (90th percentile) elasped time to repair an item is 2.3 hours and 5.4 hour, respectively. The time to repair probability distribution is not specified.
Constuct a 98% confidence interval for the average amount of sleep students at this universit got last night. Use two decimal places in your margin of error. Also , use t* = 2.352. Provide an interp
If one card is drawn from a standard 52 card playing deck, determine the probability of getting a jack, a three, a club or a diamond. Round to the nearest hundredth