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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. Assuming we are using a t test what will be the critical value"?
Give a possible description why serum cholesterol values for older males are lower than for younger males and reverse is true for females.
At the Statsville County Fair, the probability of winning a prize in the ring-toss game is 0.1. Show the probability distribution for the number of prizes won in 8 games.
It is estimated that .44 percent of the callers to the customer service department of Dell Inc. Will receive a busy signal. What is the probability that of today's 1200 callers at least 5 will receive a busy signal? Use the poisson approximation t..
To guarantee that cans of soda are properly filled, some cans are sampled and the amounts measured. The overall average for the samples is 12 ounces.
Calculate the sample statistic and standard error you will use to create the test statistic.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
Using equation presented calculate SST,SSE and SSr. Determine least squares regression line for this data.
What does the coefficient of determination tell you about the variation attendance and the variation in the number of exhibitors?
You're in charge of an experiment to evaluate a treatment which is advertised as being 90% effective at killing a particular insect. You plan an experiment in which the treatment is tested on 200 insects.
Your workplace reduces all workplace scores on particular employee aptitude test in z-scores which are placed in district-wide distribution of scores.
For the following scores, find the (A) mean, (B) median, (C) sum of squared deviation (d) variance, and (e) standard deviation:
Classifcation Which of the following are continuous variables and which are discrete?
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