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Desire the right sample size for a simple random sample.
The travel-5 largest cities in the United States are reported in the 2003 Information Please Almanac. Assume that a preliminary simple random sample of residents of San Francisco is used to develop a planning value of 6.25 minutes for the population standard deviation.
a) If we want to estimate the populations mean travel-to-work time for San Francisco residents with a margin of error of two minutes, what sample size should be used? Suppose 95 percent confidence.
b) If we want to estimate the populations mean travel-to-work time San Francisco residents with a margin of error of 1 minute, what sample size should be used? Assume 95 percent confidence.
Identify the independent and dependent variables, and Construct a nominal, ordinal, and interval level measure for each independent and dependent variable.
To forcast the sample size within 0.02 with 90 percent confidence. The CEO of the organization needs to forcast the proportion of Canadians who own their house.
An experiment consists of selecting a card at random from a 52-card deck. Refer to this experiment and find the probability of the event.
Find out the marginal probability density function for the provided value. Assume that two random variables, X and Y, have bivariate pdf given by:
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
What is the probability that the cereal would be high fiber? In other words, what is P (high fiber)?
By using this data and incorporating seasonal effects, predict quarterly turnover for 2010.
What is the probability that a cereal would be high calorie, given that it is high fiber? In other words, what is P (high calorie, given high fiber)?
Number of rescue calls received by rescue squad in city follows a Poisson distribution with mu = 2.83 per day. Squad can handle at most four calls a day. Determine the probability that squad will be able to handle all calls on a particular day?
Find out the probability that the return for common stocks will be more than 0%.
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
If code is 4 random letters, and letters can be utilized multiple times, how many different possible codes are there?
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