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A new drug has been developed that is found to relieve nasal congestion in 90 percent of those with the condition. The new drug is administered to 300 patients with this condition. What is the proba
The independent Department Store wants to determine the proportion of their charge accounts having unpaid balance of $500.00 or more.
The null hypothesis is H0: there is no difference in the results between the shifts.Alternate hypothesis is H1: there is a difference in the results between the shifts.
Describe the requirements that must be met before an ANOVA test can be used. Discuss what the researcher must do if one of the requirements is not met and give examples.
Please review analysis of ranked data Lind regards to the Wilcoxon signed-rank test, Wilcoxon rank-sum test, and Kruskal-Wallis test - analysis of variance by ranks. Of previously listed test which
A study is being undertaken of companies going public. Of particular interest is the relationship between the size of the offering and the price per share. A sample of ten companies that recently we
Thompson Machine Works purchased several new, highly sophisticated machines. The production department needed some guidance with respect to qualifications essential by an operator. Four variables we
Interpret the meaning of the slopes of the given multiple regression equation.Assume the regression equation that has been used to estimate value of existing homes is as follows.
define what is descriptive statistics.
Calculating mean, median, variance, standard deviation, sum of squared deviation.
Find descriptive statistics for given data.For the following scores, find out the (A) mean, (B) median, (C) sum of squared deviation (d) variance, and (e) standard deviation.
On a standard measure of hearing ability, mean is 300 and the standard deviation is 20. Give the Z score for person who scores (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z
A person score 81 on a test of verbal ability and 6.4 on the test of quantitative ability. For the verbal ability test, the mean for people in general is 50 and the standard deviation is 20. For the
Do students at various colleges differ in now sociable they are? Twenty-five students were randomly selected from each of three colleges in a particular region and were asked to report on the amount
Before you make a decision about Mr. Nerdly's decision, why not try the birthday game from yourself. You might want to play several times before you draw any conclusions.
Interpreting a scatter diagram.Make up a scatter diagram with 10 dots for each of the following Situations.
The Report. Explain your investigation in a report. Follow conventions as described in the general guidelines for writing up Special Problems. You would be graded on both the accurateness of your wo
The mean weight of trucks travelling on a particular section of I-475 is not known. A state highway inspector needs an estimate of the mean. He selects a random sample of 49 trucks passing the weigh
Mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. The average tread life was found to be 50,000 miles with a standard deviation of 3,500 miles. What
A bank wishes to estimate the mean balances owed by customers holding MasterCard's. The population standard deviation is estimated to be $3.00. If a 98 percent confidence interval is used and an int
Voters sampled said they planned to vote for the republican candidate for president. Using the 0.95 degree of confidence, what is the interval approximation for the population proportion (to the nea
A random sample of size 15 is selected from a normal population. The population standard deviation is unknown. Suppose that a two- tailed test at the 0.10 significance level is to be used. For what
A manufacturer of stereo equipment introduces new models in the fall. Retail dealers are surveyed immediately after the Christmas season regarding their stock on hand of each piece of equipment.
Based on the Nielsen ratings, the local CBS affiliate claims its 11:00 pm newscast reaches 41 percent of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch t
The mean number of travel days per year for salespeople employed by hardware distributors needs to be estimated with a 0.90 degree of confidence. For small pilot study mean was 150 days and the stan