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In a sample of 167 children selected randomly from one town, it is found that 37 of them suffer from asthma. At the .05 significance level, test the claim that the proportion of all children in the town who suffer from asthma is 11%.
For each of the following, identify the scale of measurement (NOIR) and the best measure of central tendency for the data.
a) Under what circumstances can z be greater than one? b) Under what circumstances can a probability be greater than one?
Develop a 95% confidence interval for the proportion of the population of adults who feel customer service is better today than it was 2 years ago.
Determine the probability of having more than 3 defects in a roll?
Assume that the mean useful life of a particular lightbulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Determine the percentage of lightbulbs that will last 2,300 hours or longer.
Your company produces a product in a market that has grown by 10% per year for the past 15 years. According to your estimate, the market is currently at 30% of saturation. Predict sales for the next 20 years.
Before 1918, in a random sample of 11 wolves spotted in the region, what is the probability that 8 or more were male?
Generate a 95% confidence interval for the difference in mean HDL levels between men when exercise regularly and those who do not.
Set up the null and alternative hypotheses for testing these claims. In order to conduct the test, the customer selected a significance level of alpha=.05. Interpret this value. (I.e. what does it mean to conduct the test at a level of alpha=.05)
Find the Probability and prove that the given two events are mutually exclusive and independent or not.
Find the probability that it has a defective bulb or defective battery, a good bulb or good battery,a good bulb and good battery.
A manager of a gasoline filling station is thinking about a promotion that she hopes will bring in more business to the full-service island. She is considering the option that when a customer requests a fill-up
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