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How to find the 95% confidence interval for mean. A small New England college has a total of 400 students.
Go to Bureau of Labor Statistics and find the Consumer Price Index-All Urban Consumers. Choose the base as 1967, and find out the CPI for the above years. Compare the rate of change in
Compute the confidence interval for proportion. A recent examination of 75 workers found that 53 people rode the bus to work each day.
How to find the sample size for the true population mean. A manufacturer of dodge balls utilizes a machine to inflate its new balls to a pressure of 13.5 pounds (σ =0.1).
Compute the sample size for the true proportion. The Ohio Department of Agriculture experienced 203 fuel samples across the state in 1999 for accuracy of the reported octane level.
A local voluntary organization affiliated to Citizens Advice Bureau offers free financial advice to residents in area who are registered debtors.
Describe 90% confidence interval for the population proportion. In a poll of 1,004 adults and 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink.
Explain minimum sample size to estimate the proportion. Freshly a case of food poisoning was traced to a particular restaurant chain.
Compute the 90% confidence interval for population mean. At the end of 1990 and 1991 and 1992 the average prices of a share of stock in a money market portfolio were $34.83, $34.65 and $31.26 respec
How to find the 99% confidence interval for the population mean. The coffee or soup machine at the local bus station is supposed to fill cups with 6 ounces of soup.
How to find the sample size to estimate population mean. A state highway department is studying traffic patterns on one of the busiest highways in the state.
Describe your results in (a) and suggest the degree to which they could be employed to make a decision about which system to employ.
How to find the sample size to estimate population mean. A company is attentive in estimating μ the mean number of days of sick leave taken by its employees.
How to find the value of sample proportion. Eighty-eight shoppers were interrogated at random and 59 said that they prefer to shop alone.
Estimate the mean amount as well as obtain the bound for the estimate. A definite firm specializing in the manufacture and sale of leisure clothing has 80 retail stores in Florida and 140 in Californ
The mean price of new homes from the sample of houses is $155,000 with standard deviation of $15,000. The data set has a bell-shaped distribution. Between what two prices do 68% of houses
Estimate the total number as well as bound on the error of estimation for proportion. A company auditor was attentive in estimating the total number of travel vouchers that were incorrectly filed.
Five people are sick with flu on the bus of 51 people. You shake hands with 5 different people. Find out the probability that you didn't shake hands with the person with the flu?
Coffee Tasting The Tasty Bean Coffee Company claims that its coffee is so good that you can distinguish it from any other coffee. Five different brands of coffee (one of them Tasty Bean) are set bef
Examination whether the two variables are independent. A random model of 70 students is taken to investigate the Association between gender and residency status
Additional than 17 out of the next 20 business days. If this actually happened, might a person suspect that p is greater than 0.60? Explain.
How to find the correlation coefficient. The explanatory variable is a measure of neighbourhood socioeconomic status (variable_RFM)
Cellular Phones According to an article appearing in The Wall Street Journal, about 35% of all U.S. households have a cellular phone.
Dress Habits A research team at Cornell University conducted a study showing that around 10 percent of all businessmen who wear ties wear them so right that they actually decrease blood flow to the
A pharmaceutical company wants to find out whether there is any difference between three different types of drugs (A, B and C ) with respect to how long they're retained in body.