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Using a 0.05 level of significance, test the hypothesis that the probability of the NCAA Division I basketball champion being from the Pac 10 is 20%. Repeat the test for the hypothesis that the probability the champion is UCLA is 20%. What do these results say about testing with group data? Include in your answer the URLs of the sites where you found the necessary data.
Disney tells you that the average distance between the ears on a Mickey Mouse hat is 5 inches. In a sample of 100 Mickey Mouse hats you find that the average distance between the ears on the hats is 5.2 inches with a standard deviation of 1 inch.
It is claimed that 70% of the residents in a large town approve of the current zoning law. Four residents are to be randomly selected. Find the probability that:
Determine 95% confidence interval for the population mean, based on the sample mean.
Find the best predicted temperature (in degree F) at a time when a cricket chirps 3000 times in one minute. What is wrong with this predicted value?
An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed. If a sample of 16 bulbs has an average life of 50 hours and the population standard deviation is known to be 10 hours.
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
Carry out an ANOVA and describe in detail in a BPS-formatted Results section:
A manufacturer wishes to estimate the proportion of washing machines leaving the factory that is defective. How large a sample should she check in order to be 93 percent confident that the true proportion is estimated to within 0.014?
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
Which of the following can be treated as binomial experiment? (a) Surveying 1200 registered voters to determine their preferences for the next president?
At a local supermarket receiving dock, the number of truck arrivals per day is recorded for 100 days. Estimate the mean from the sample.
In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?
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