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Question: How have statistics been used inappropriately and what are some examples of when you have seen or heard statistics used inappropriately?
Statistics and Probability, Statistics
Consider the study of two insect populations at two exper- imental stations. At station A, the egg hatch rate (computed from a set of 100 eggs at a time) is known to follow approximately a normal distribution with mean 6 ...
The director of research and development is testing a new drug. She wants to know if there is evidence at the 0.02 level that the drug stays in the system for more than 339 minutes. After performing a hypothesis test, sh ...
1. Choose all probability distributions which are theoretically related to normal probability distribution 2. The 68-95-99.7 rule states that in a normal distribution 3. For a normal distribution the a mean of 179 and st ...
In a pre-election poll, a candidate for district attorney receives 379 of 750 votes. Assuming that the people polled represent a random sample of the voting population, test the claim that a majority of voters support th ...
According to a study in a previous year, 57.0% of households nationwide used natural gas for heating during a year. Recently, a survey of 2,700 randomly selected households showed that 58.0% used natural gas. Use a 0.05 ...
Consider a hypothesis testing problem where the null and the alternative hypotheses are defined as H0 μ=5 Vs. H1 :μ≠5 H0:μ=5 Vs. H1:μ≠5 A 95% confidence interval for μ was calculated as (2, 7). A) What would be your conc ...
In random sampling, why is cluster sampling an example of probability sampling?
On the production line the company finds that 95.6% of products are made correctly. You are responsible for quality control and take batches of 30 products from the line and test them. What number of the 30 being incorre ...
A researcher is planning to a silvicultural study using 3 different fertilizers on 3 adjacent plots. How many ways can the 3 plots be arranged if there are 18 fertilizers to choose from?
1) Let Z be a standard normal random variable with mean = 0 and standard deviation = 1. Us the normal table to find the following answers. a) P(0 b) P(-1.22 c) Find the value Z 0 such that P(0 0 )= 0.4901. 2) On a typic ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p
Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As
Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int
Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As