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Question: To measure the activity of a radioactive sample, two students count the alpha particles it emits. Student A watches for 3 minutes and counts 28 particles; Student B watches for 30 minutes and counts 310 particles.
(a) What should Student A report for the average number emitted in 3 minutes, with his uncertainty?
(b) What should Student B report for the average number emitted in 30 minutes, with her uncertainty?
(c) What are the fractional uncertainties in the two measurements? Comment.
For a randomly selected woman, find the probability that her sitting eye height is less than 700 mm. The probability that a woman's sitting eye height is less than 700mm is .1190.
The adhesion of one 4400-horsepower diesel locomotive model varies in actual use according to a Normal distribution with mean ? = 0.37 and standard deviation ? = 0.04.
Florida State University administers a mathematics placement test to students where they 1st enter the university.
If a correlation coefficient was calculated for n = 15, alpha = 0.01, and r = 0.85, what is the test value found using the t-test?
question response time at an online site can be modeled with an exponential distribution with a mean service of 5
Want a sample size of about 60 (30 controls and 30 cases). At 5% significance and 80% power.How do i determine the standard deviation and mean difference.And how do i arrive at the 60? my study design is case-control.
To compare the effectiveness of three types of pain relievers, a homogeneous group of 22 students were divided randomly into three groups, and each group took one of three pain relievers for a period of 2 weeks.
an internal study by the technology services department at lahey electronics revealed company employees receive an
a manufacturer claims the average life of a product is 500 hours. the lifetime of the product is assumed to follow an
What is the point estimate of the difference between the population mean expenditure for males and the population means expenditure for females?
A restaurant has three sources of revenue: eat-in orders, takeout orders, and the bar. What are the mean and standard deviation of the total revenue on a particular day?
Describe the use of sensitivity analysis and postoptimality analysis in analyzing the results. Describe the characteristics of a Bernoulli process. How is a Bernoulli process associated with the binomial distribution?
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