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Question: We know that IQs are normally distributed with a mean of 100 and standard deviation of 15. Suppose you want to verify this, so you take 100 random samples of size four each and, for each sample, find a 95% confidence interval for the mean IQ. You expect that approximately 95 of these intervals will contain the true mean IQ (100) and approximately five of these intervals will not contain the true mean. Use simulation in Excel to see whether this is the case.
We have no idea Regarding the shape of the population distribution. What is the probability that the mean fee for a sample of 30 customers was less than $125?
Use the normal distribution below to answer the following questions. What is the mean number of hours of sleep that people get each night? What is the standard deviation of the variable "hours of sleep per night"
before some time designated t0 an incompressible newtonian fluid is stationary in a horizontal chamber. at t0 a
acme truck manufactures 8 and 16 wheel vehicles. in 2010 25 of trucks manufractured had 8 wheels and 75 of the trucks
Exponential smoothing with trend, with a smoothing constant of α = 0.2 and a trend smoothing constant of ß = 0.3, is being used to forecast values in a time series. At this point, the last two values have been 535 and then 550. The last two foreca..
Analyze these data and summarize your findings for managers. Explain how information can be used by decision makers. Assume that sales per customer are normally distributed.
consider the system with components as shown below indicating their failure relationship. the component reliabilities
Write a short report dicussing the claim that average diastolic blood pressure in 1958 (variable dbp58) is the same for men who were alive in 1968 and for men who were not.
The first step in this assignment is to provide SPSS with the Value Labels for the values in LOCALE97.
Question 1. What is the predicted range for the mean grade for an average future student enrolling in the CHEM 103 course? Question 2. What is the predicted mean grade for an average future student enrolling in the CHEM 103 course?
Vietnam War were the targets of protests? Did these issues change overtime? Write a protest song that relates to the Vietnam war.
1. a random sample of 26 offshore oil workers took part in a simulated escape exercise and their times sec to complete
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