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A weatherman stated a null hypothesis that during the month of September, the mean daily temperature of Boston was the same as the mean daily temperature of New York. His alternative hypothesis was that the mean temperature in these two cities were different. He computed a p-value of 0.094. Using a confidence level of 90%, he should conclude:
Which of the following descriptions of confidence interval is correct?
Imagine a researcher presented a null hypothesis that in a certain community, the average energy expenditure of residents is at least 2100 calories per day. He randomly sampled 100 residents in that particular community. He computed a negative test statistics and associated p-value was 0.08. Given 90% confidence level, he should conclude:
In a statistical hypothesis test, how is the rejection region impacted when the level of significance is increased?
Give two alternative representations of the log-likelihood function - How would the log-likelihood function differ for the logit model?
scores on a mathematics examination appear to follow a normal distribution with mean of 65 and standard deviation of
Suppose that 30% of the population has black hair. In a randomly-selected group of six people, how probable is it that
Identify the type of sampling (random, systematic, convenience, stratified, cluster) used when a sample of people who smoke is obtained as described below.
Six employees who have formed a car pool. If only four of these employees can drive, how many possible seating arrangements are there for the group?
If Ashley Company accounts for the investment as a minority, passive and classifies the investment as an available-for-sale investment, Ashley will recognize what amount of 2010 income from the investment?
there are 5 identical looking coins in your pocket. two of the coins are fair while the other three are biased so that
Calculate the test statistic for testing the null hypothesis. The slass mean will be not be signfically different from the population mean. What is your decision about the null hypothesis?"
a quality control experiment is to be done on a machine that fills tubes with toothpaste. its specifications require
Find the exact chance (i.e., not using a normal approximation) that he loses $400 or more over the course of the evening.
the data from an independent-measures research study produce a sample mean difference of 6 points and an estimated
Discuss some of the advantages and disadvantages of the WHO protocol versus the single test. Give the assumptions that you have made in carrying out calculations.
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