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Basic Statistics
Surgical Intensive Care Unit would like to be better prepared by predicting number of surgical patients they must expect.
Past 15 days illustrates following numbers of surgeries performed. Perform the 3-period moving average, exponential smoothing forecasting using the alpha of .25, and seasonal forecast with 3 seasons.
Day Surgeries1 102 83 124 105 96 147 118 109 1510 1311 1312 1613 1414 1315 18
Forecast for day 16 by using 3-period Moving Average?
Forecast for day 16 by using Exponential Smoothing (alpha = .25)?
Forecast for day 16 by using Seasonality with 3 seasons?
Calculate the measures of central tendency, dispersion, and skew for your data. Display your descriptive statistical data using graphic and tabular techniques.
Explain in language that the manager can understand why we cannot be confident that sales rose by 6%, and that in fact sales may even have dropped.
Two bonus points for rigorously proving Xt and Xt+1 are not independent. Let Xt=1+et-0.5et-1, t=1,2,3,..., where et~IID N(0,2), variance of et is 2. Calculate the mean of Xt.
Mattel Corporation produces a remote-controlled car that requires three AA batteries. The mean life of these batteries in this product is 35 hours with a standard deviation of 5.5 hours. As part of its testing program Sony tests samples of 16 batt..
when the variances of the population distribution and the sampling distribution of means are compared thea. variences
Suppose that 1% of all the students seeking treatment at the school infirmary have mono. Of the students who do have mono, 90% complain of a sore throat. Of the students who do not have mono, 30% also have sore throats.
In 2010, 65% of adult Americans thought that the death penalty was morally acceptable. In a poll conducted by the Gallup Organization, a simple random sample of 1005 adult Americans
question a high school counselor wants to examine whether the teenage pregnancy rate at her school is different from
the random sample shown below was selected from a normal distribution849546construct a 95 confidence interval for the
It was reported that 20 readers responded and 87% said "no" whiles 13% said "yes". Identify four major flaws of the situation. Explain why you chose them.
An auditor for a Health Maintenance service of Georgia reports 40% of policyholder 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
Decileter and standard deviation of 41 mg/dl. in an srs of 100 men what is the probability that x bar takes a value between 185 and 191 mg/dl?
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