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Construct now the 95% confidence interval for the difference p1-p2. Could you conclude that p1 and p2 are different ? Explain your answer.
Construct a 95% confidence interval for mu1 (213,872) -- Standard deviation: 69,261, the expected price of real estate in the zone1 and for mu2 (256,684) -- Standard deviation: 93,192, the expected
Give all answers to four decimal places. There are four different blood types that people have A, B, AB and O. We will take a random sample of 15 people and conduct a test of H0: p = 0.45 vs Ha: p &
In many ways, comparing multiple sample means is simply an extension of what we covered last week. What situations exist where a multiple (more than two) group comparison would be appropriate?
Several statistical tests have a way to measure effect size. What is this, and when might you want to use it in looking at results from these tests on job related data?
Suppose that when the sample is taken, 21 of the 25 graduates have some student loan debt. Do you believe the administrator's claim? Explain why or why not using probabilities.
Create a table for the probability distribution for the random variable X, the number of new employees Amy will have to hire. Compute the expected value of the number of new employees Amy will hire fo
Heights of women have a bell-shaped distribution with a mean of 156 cm and a standard deviation of 8cm using the chevyshev's theoriem what do we know about the percentage of women with heights that
Nurses wondered if birth weights of babies are going up. They knew that the average birth weight of a baby last year was 7.6 pounds. A random sample of 15 weights of babies at the hospital where the
The distribution of sample means will not be normal even though the population data followed a normal distribution because the sample size is less than 30
Based on interviews with 83 SARS patients; researchers found the the mean incubation period was 4.3 days with a standard deviation of 14.2 days. Based on this information, construct a 95% confidence
A television sports commentator wants to estimate the proportion of citizens who follow professional football.
A researcher wishes to estimate the proportion of adults who have high speed internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 99% confidence if
In an experiment, 50 individuals were told that they had just purchased a ticket to a concert and 50 were told that they had just purchased a personal digital assistant (PDA). The participants were
Use the given degree of confidence and sample data to construct a confidence interval for the population mean. Assume that the population has a normal distrobution. n=10, x-=8.1, s=4.8, 95% confiden
The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 70 inches, and a standard deviation of 10 inches. What is the probablility that the mean annual show
Find the critical value. Assume that the test is two-tailed and that n denotes the number of pairs of data. n = 60, = 0.05
State the null and alternate hypotheses, state whether the null hypothesis should be rejected or not rejected and your reason for that conclusion, state the meaning of that conclusion specifically i
A random sample of 400 business school graduates showed that 75 had gone to graduate school while in a random sample of 500 non-business graduates, 137 had gone on to graduate school. Based on these
Which of the following methods could lead to stronger evidence for the outcome of a nonparametric test?
Which of the following nonparametric tests reaches a conclusion equivalent to the Mann-Whitney U test?
Find the indicated IQ score. The graph to the right depicts IQ score of adults and those scores are normally distributed with a mean of 100 and a standard deviation of 15. The graph depicts 0.7 to t