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A randomly selected value froma normal distribution is found to be 2.1 standard deviations above its mean.
a. what is the probability that a randomly selected value from the distribution will be greater than 2.1 standard deviations avoe the mean?
b. What is the probability that a randomly selected value from the distribution will be less than 2.1 standard deviations from the mean?
The buyer-believes that the differences are normally distributed and will use this sample to perform an appropriate test at a level of significance of 0.01.
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
Karefree State University has an enrollment of 18,000. Researchers took a sample of 900 and found 477 students wanted a Field Hockey team. Construct the 95% and 99% Interval estimates for the population proportion.
A bond analyst is analyzing interest rates for corresponding municipal bonds issued by two different states. At α = .05, is there a difference in interest rates paid by two states?
What would that evaluation be and what is the margin of error?
Find the Probability and prove that the given two events are mutually exclusive and independent or not.
Describe the given data show a seasonal effect using moving average method. Describe the data which show a seasonal effect.
A researcher wants to collect data about the study habits of sophomores at Harmond University. From the sophomore class of 2,300 students, she wants to collect a sample of 70 students. Which of the following sampling methods will yield the most re..
At 5% level of significance, is there evidence of difference in mean life of bulbs made by the 2 kinds of machines. What is your conclusion?
Show that theta~ = u(X) is an unbiased estimator of theta, where u(0) = 1 and u(x) = 0 if x =1,2, ... Compare the MSEs of theta(hat) and theta~ for estimating theta = e^(-m) when m=1 and m=2
Joe has started an iphone booth in the mall. His francise booth and other startup costs total $82,000. Joe expects to pay $240 per iphone unit and sell them for $390 each. Joe needs to reach a 10% profit margin.
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