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Providing excellent customer service is essential in any business. A bank samples 7 tellers and monitors the time to complete a transaction. The times ( in whole minutes) are 2,4,2,5,2,3, and 10. The variance for the data calculated is 4.33. Given this information, compute the following:
a) Interquartile Range
b) Coefficient of variation
c) You are the statistician. The bank informs you for your statistical analysis, they do not want you to use the date point of 10 minutes since it is not in line with the other data. How do you respond?
suppose a study of 196 randomly sampled privately insured adults with incomes over 200 of the current poverty level is
we roll two six sided dice one with sides 122334 and the other with sides 134568. what is the distribution of the
an investigator wants to show that first-born children score higher on iq tests than second-borns. he takes a simple
How many dissimilar computer passwords are possible?
Body mass index is measured as the ratio of weight in kilograms to height in meters squared. Generate a 95% confidence interval estimate of the true BMI.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the ..
An independent-measures research study was used to compare two treatment conditions with n = 4 participants in each treatment. The first treatment had a mean of M = 58 with a variance of s^2 = 28, and the second treatment had M = 52 with s^2 = 36.
The average blood pressure reading will be less than 150 and hence fail to indicate that the patient has a high blood pressure problem?
How many questions must the test contain in order to reduce the standard deviation of Julie's proportion of correct answers to one-fourth its value for an 100-item test?
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour. Suppose the arrival of these emails is approximated by the Poisson distribution.
according to the centers for medicare amp medicaid services 16 of nursing homes received five stars in overall ratings
Calculate a 90% CI for the population proportion of Americans who believe there is intelligent life on other planets.
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