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Business and Management
Suppose the dentists at the Eastin Center for Modern Dentistry in Coeur D'Alene, Idaho, never see a patient on time. The amount of time (in minutes) past the appointment time a random patient must wait to see a dentist has an exponential distribution with l 5 0.01. Suppose a patient is selected at random, and the appointment time has passed.
a. What is the probability that the dentist will see the patient within five minutes after the appointment time? Write a Solution Trail for this problem.
b. Find the probability that the dentist will see the patient between 10 and 20 minutes after the appointment time.
c. Find the probability that the patient will have to wait at least 30 minutes past the appointment time.
The economic and market position of the pipelines has been described as mature and stable with little likelihood of significant growth in the near future. Do you agree? Why or why not?
Given that X‾ = 78, σ2 = 25, n = 10 and α = .05, test H0 : μ > 80, assuming observations are randomly sampled from a normal distribution. Also, draw the standard normal distribution indicating where Z and the critical value are located.
a researcher wishes to determine whether happiness and marital status are dependent from one another. the table below
1 in a two-tailed hypothesis test the test statistic is determined to be z -2.5. the p-value for this test why?a is
Suppose a simple random sample of size 50 is selected from a population with σ= 10. Find the value of the standard error of the mean in each of the following case?
If the auditor takes a simple random sample of 93 accounts, what is the probability that the mean of the sample will be within 110 dollars of the population mean?
Consider repair cost for Car A and Car B. The mean repair cost for each is $500 per year. Which statistics about repair cost may play into your decision to purchase one of these?
Are the residuals from such a regression independent? Is there a difference in model fit and independence of residuals when using infant death rate as a response variable?
hiv infection among intravenous drug users. found that 40 light users and 55 were heavy users were hiv positive.1
the personnel director of a large corporation wishes to study absenteeism among clerical workers at the corporations
Use the data that follow to construct a 95 percent confidence interval about the sample mean. Write an interpretation about the effectiveness of the workshop.
Copier C1 has been observed to serve on an average 40 customers per hour during the peak periods when it is never idle; the service time of this copier is exponentially distributed.
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