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In random sampling, each item or element of the population has an equal chance of being chosen at each draw. A sample is random if the method for obtaining the sample meets the criterion of randomness (each element having an equal chance at each draw). The actual composition of the sample itself does not determine whether or not it was a random sample
What measure of central tendency is most sensitive to skewness and which is least sensitive? What are measures of central tendency used for? What are measures of dispersion used for?
Joe has started an iphone booth in the mall. His francise booth and other startup costs total $82,000. Joe expects to pay $240 per iphone unit and sell them for $390 each. Joe needs to reach a 10% profit margin.
Find the probability that fewer than 10 of those sampled currently have access to online services.
The average salary of senior managers in the construction industry is $180,000 per year. Suppose we would like to take a sample of senior managers at a newly established company XYZ to see whether the mean annual salary is different from that..
Find the probability that 10 customers will arrive in a particular 15-minute period. Set up the mathematical model and use the table.
At the .05 level, can we conclude-that women think men are less kind, gentle, and thoughtful in 2000 compared with 1990?
Show some work for each part. A diagram can be helpful. A survey of adults found the following: 65 percent of the adults drink coffee. 35 percent drink tea. 80 percent drink coffee or tea (or both). If we choose a surveyed adult at random, find t..
A sample of 15 workers revealed the following number of minutes traveled. Develop a 98 percent confidence interval for the population mean. Interpret the result. Please explain how you calculate.
at a local middle school 60 of students are enrolled in choir or band. if a random sample of 5 students is taken what
Net sales of the Kaiser Aluminum and Chemical Corporation for the period beginning in 1975 and ending in 1984 were:
Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial.
A certain company relies heavily on phone orders. Suppose past records show that R% of all incoming phone calls to this company are orders from customers.
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