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A simple random sample of 29 students enrolled in graduate programs was selected, and the age of each student when they took the comprehensive exam was recorded. The mean age at the time of taking the comprhensive exam for this sample of 29 students was 26.9 years with a standard deviation(sigma) of 2.5 years; there were no outliers in the sample that would lead one to suspect heavy skewness in the distribution. If appropiate, use the information to calcualte and interpret a 95% confidence interval for the mean age of students at the time they take the comprehensive exam for all students enrolled in graduate programs that require students to take comprehensive exams.
Determine if this sample data provides sufficient evidence to indicate that the bulbs have their advertised life expectancy. Do NOT do a confidence interval.
customers at a gas station pay with a credit card a debit card b or cash c. assume that successive customers make
Find the probability that 4 of the 5 committee members belong to a union.Find the probability using hypergeometric distribution.
consider a sequence of independent bernoulli trials with p0.28.a what is the expected number of trials to obtain the
Ppaid full salary for the current year. a. Determine how to minimize the bus company's salary, hiring, and firing costs over the next 5 years.
How can these three levels be used to evaluate risk to patients in implementing decisions based on research findings? a statistical significance of p
The table below shows the probability distribution of the annual sales (in Millions) of a small rm. Calculate the Expected value, Variance, and Standard deviation of the annual sales?
Assume that z is the test statistic and calculate the value of z∗ for testing the null hypothesis
if they expect to satisfy about 80 orders in the next financial quarter, what is the probability that they will break their previous export record?
q2. hospital stays.theu.s.nationalcenterforhealthstatisticscompilesdataon
1. according to a survey 63 of murders committed last year were cleared by arrest or exceptional means. fifty murders
If a sample of 800 homes sold in 2004 is obtained what is the probability that between 175 & 200 homes are going to be investment?
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