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A statewide real estate company specializes in selling farm property in the state of Nebraska. Their records indicate that the mean selling time of farm property is 90 days. Because of recent drought conditions, they believe that the mean selling time is now greater than 90 days. A statewide survey of 100 farms sold recently revealed that the mean selling time was 94 days, with a standard deviation of 22 days. At the .10 significance level you will test to determine if there has been an increase in selling time. What is the value of your test statistic?
A job placement director claims that the average starting salary for nurses is 24,000.A sample of 10 nurses' salaries has a mean of 23, 450 and a standard deviation of 400. Is there enough evidence to reject the director's claim at 0.05 level of s..
what percent of the total number of seeds germinated?
The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.
Pilot sample of n = 50 tires illustrated sample standard deviation equal to 4,000 miles. Based on this information, required sample size is?
In comparing the two variances below, what is the test value and what are the degrees of freedom that should be used?
How is this relationship different from the bi-variate relationships?
A sample of 19 albino Hungarian banded aardvarks was examined for nose length. Since this is a small sample, how various degrees of freedom will be used to find the t-score.
Estimate with 90% confidence the difference in the level of satisfaction with service between the two branches.
Estimating confidence interval for mean value of y and find a 95% confidence interval for the expected average total sleep time for a child of age 12
Find the area under the normal distribution curve to the right of z = -1.03.
Employer wishes to interview only those applicants who score in top 15%. What must cut-off score be for interviews?
The Pearson Product-Moment Correlation Coefficient (r) is a measure of linear relationship between two variables.
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