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1) The number of students who belong to the dance company at each of several randomly selected small universities is shown here. Estimate the true population mean size of a university dance company with 95% confidence.
21 25 32 22 28 30 29 30 47 26
35 26 35 26 28 28 32 27 40 45
2) A pizza owner wishes to find the 95% confidence interval of the true mean cost of a large plain pizza. How large should the sample be if she wishes to be accurate to within $0.15? A previous study showed that the standard deviation of the price was $0.26.
A sociologist wishes to study the relationship between happiness and age. He interviews 24 individuals and collects data on age and happiness
Milk cartons are advertised to contain one litre of milk. From a random sample of 18 one-litre cartons whose contents were accurately measured by the South African Bureau of Standards (SABS), it was found that the average fill was 0.981 l with a s..
A quality characteristic of interest for a tea-bag-filling process is the weight of the tea in the individual bags. Compute the arithmetic mean and median. Compute the first quartile and third quartile
Suppose the Sam Sell Select Fund buys a property at the end of 2005 for $11,250,000 on behalf of its wealthy investor clients.
let x be a binomial random variable with p0.5 and n10. calculate the following probabilities from the binomial
Impact of Exchange Rates on MNC Val Olmsted Co. has small computer chips assembled in Poland and transports the final assembled products to the parent, where they are sold by the parent in the United States. The assembled products are invoiced in ..
When the data for the 27 subjects are 14 binomial observations (for the 14 distinct levels of LI), the deviance for this model is 15.7 with df = 12. Is it appropriate to use this to check the fit of the model? Why or why not? b. The model that als..
The true sampling error is usually not known because
In a certain city of several million people, 7.8% of the adults are unemployed. If a random sample of 205 adults in this city is selected
A chess tournament has 100 players. In the first round, they are randomly paired to determine who plays whom (so 50 games are played).
The following data represents the pulse rates of ten randomly selected females after stepping up and down on a 6-inch platform for 3 minutes. Pulse is measured in beats per minute. Compute the sample mean pulse.
In a particular exercise, Juan de Alonso assigns him three take-offs and landings on the aircraft carrier to which he is assigned. Under the assumption that the events resulting from each landing attempt are statistically independent of each other..
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