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Compute the 99% confidence interval based on four data points that have a sample mean of 71.5 and a sample standard deviation of 16.6032
Explain how you know the data in any research you are doing is valid.
Explain the Central limit theorem in your own words. What is the value of it? What assumption does one have to make when using it?
In a nationwide survey of 1000 companies with more than 50 employees, managers were asked to rank various factors that influence their decisions in hiring
A marketing firm wants to estimate the average amount spent by patients at the hospital pharmacy. For a sample of 100 randomly selected patients
A drug manufacturer wants to estimate the mean heart rate for patients with a certain heart condition.
A consumer group would like to estimate the average amount of P G and E bill for the month of March for single family homes in the San Francisco Bay area
A random sample a 16 Google managers yield the following information on annual salaries. The sample mean is $69,000, with a sample standard deviation of $4,000
A sample of 35 golfers showed that their average score on a particular golf course was 80 with a standard deviation of 6.
Why are estimations and confidence intervals important?
You work for a consumer advocate agency and want to find the mean repair cost of a washing machine.
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. The information is summarized below.
Your hospital is negotiating with medical insurance providers, who would like to reduce the amount they pay as reimbursement for hospital stays.
Test the null hypothesis that the population mean weight loss is zero versus the alternative hypothesis that the mean weight loss is greater than zero
For a t distribution with 16 degrees of freedom, find the area, or probability, in each region.
Katherine Tao, Director of Marketing Research, is evaluating consumer acceptance of a new toothpaste package. Her staff reports that 17% of a random sample
On 10 leases on the outer continental shelf in the Gulf of Mexico in 1984, Atlantic Richfield submitted bids
The personnel director of a large corporation wished to study absenteeism among clerical workers at the corporation's central office during the year
Finding Margin of Error. Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics
It is the year 1581 A.D. At the Renaissance University (RU), I am the appointed CPA, Coffee Pot Attendant. It is a very important office sponsored by the Head
The US Census Bureau announces that the median sales price of new houses sold in March 2006 was $224,200 while the mean sales price was $ 279,100
Interpret a 99% confidence interval of (5.355, 5.445) for a population mean.
Consider that 10 observations were selected from a normal population whose variance is 64. Observations are: 58, 62, 45, 50, 59, 65, 39, 40, 41 and 52
Management has asked a lab to produce accurate results at the 88% level for a first time experiment
Below attachment contains data for 400 customers. This company, ElecMart sells electronic appliances for mail-in orders. Consider this data as a random sample