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A standardized achievement test provides a distribution of scores with a mean of 200 and a standard deviation of 25. A researcher has taken two independent samples of scores. Sample 1 has a sample size of 50, while sample 2 has a sample size of 150. Which of these samples is more likley to have a mean of 260 and WHY
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:
What is the probability that exactly 7 cabinets are defective? What is the probability that there are more than 8 defective file cabinets?
an american association of individual investors aaii survey found that 23 of aaii members had purchased shares of stock
Provide free: fax assistance for the residents of this city, use the binomial approximation to the hyper geometric to find the probability that at least 3 women arc selected.
The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.
In determining automobile mileage ratings, it was found that the mpg in the city (x) for a certain model is normally distributed, with a mean of 24 mpg and a standard deviation of 1.0 mpg. Find the following:
What is Dutch book argument for the first axiom of probability (the one that says that the probability of a sentence is never less than 0 or more than 1)?
The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally distributed variable. Find the probability that one student selected at random is older than 23.
Use a scatter plot to determine the relationship between the x values and the y values.
Assuming that these are a random sample of all publicly traded companies, construct a 95% confidence interval for the overall noncompliance proportion.
In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164 cm. What was the mean height for both groups put together?
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