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Question:
New Horizons Airlines wants to forecast the mean number of unoccupied seats per flight to Germany next year.To develop this forecast,the records of 49 flights are randomly selected from the files for the past year,and the number of unoccupied seats is noted for each flight. The sample mean and standard deviation are 8.1 seats and 5.7seats,respectively. Develop a point and 95% interval estimate of the mean number of unoccupied seats per flight during the past year. Forecast the mean number of unoccupied seats per flight to Germany next year. Discuss the accuracy of this forecast. Draw a curve to support your explanation.
A student is selected at random to represent the school at a conference. The probability that the selected student is a liberal arts major is what?
Given the following raw scores, calculate the following values: Range, Variance and Standard Deviation, show your calculations: Scores: 9, 7, 8, 4, 8, 8,7, 8, 9, 6, 3
How large of a sample would be necessary if no estimate were available for the proportion that support current policy?
Determine z score corresponding to minimum height requirement and determine z score corresponding to maximum height requirement.
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Assuming the requirements of ANOVA are satisfied, at the .05 level of significance, is there evidence of a significant difference among the mean wait times at the five checkpoints?
International Agricultural Producers publishes annual data on various selected farm products. Shown above are the unit productions figures (in millions of bushels) for three farm products for 10 years.
Joan's nursery specializes in custom-designed landscaping for residential areas. the estimated labour cost associated with a particular landscaping proposal is based on the number of plantings of trees,shrubs and so on to be used for the project.
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
30% of college freshmen support increased military spending. If 12 college freshmen are randomly selected, find the probability that more than 5 selected students support increased military spending.
Level of education attained by the women from a rural region is divided into three categories: can read/write degree; primary degree; secondary and above degree
A researcher investigating sex role stereotypes and occupational aspirations drew a random sample of 125 female university students.
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