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State the hypothesis and calculate the test statistic for proportion:
1. In a random sample of 400 persons who were given a flu vaccine, 136 said that they experienced some type of discomfort. Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
2. Do the data provide sufficient evidence to conclude that the proportion of those who experience some type of discomfort is more than 30%? Answer the question using the following steps
a. State the null and alternative hypotheses.
b. Calculate the test statistics. Show your work.
Determine marginal probability distributions of X and Y . Compute conditional probability P ( Y = 2 | X = 1)
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
would this prove that they are exceeding their goal, using α = .025?
State the hypotheses for a right-tailed test.
By using the fact that Martha believes the treatment will decrease the amount of time to fall asleep, describe the null and alternate hypotheses.
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
Calculated test statistic, decision about the null hypothesis interpretation of results, and a list of references consulted.
At the 10% level of significance, is there sufficient evidence to indicate that more books are being loaned out per day, on the average?
An old saying in golf is "you drive for show and you putt for dough." The point is that good putting is more important than long driving for shooting low scores and hence winning money.
Both days have sample standard deviations of 3.4. Is the average mean of size different from day 1 to day 2?
Determine the probability in big class that both sections are covered? Only one section? Neither section? Determine the expected number of sections covered?
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