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Question: Suppose you had a student telephone directory for your local college and wanted to sample 100 students. Explain how you would obtain each of the following:
a. A simple random sample
b. A systematic sample
Statistics and Probability, Statistics
If material hardness is normally distributed with a mean of 42 and a standard deviation of 1. Specification limits for hardness are from 35 to 45. When the fraction defective is 0.0017 what is the corresponding PPM?
1 . Consider the following data on distances traveled by 60 people to visit the local amusement park. distance freq 1-8 20 9-16 18 17-24 10 25-32 6 33-40 6 Expand and construct the table adding columns for relative frequ ...
I. A statistics instructor wants to measure the effectiveness of his teaching skills in a class of 66 students ( N = 66). He selects students by waiting at the door to the classroom prior to his lecture and pulling asid ...
What level of measurement is required for qualitative variables? What level of measurement is required for quantitative variables? Can both types be used to describe both samples and populations? Why or why not?
A package contains 12 resistors, 2 of which are defective. If 4 are selected, find the probability of getting the following results. Round your answer to six decimal places. 0 defective resistors P(0 defective)=
If you know your raw score is 35, your z score is -3, and your t score is 20. The mean is 50 and the standard deviation is 5. How would you use this information to solve for a percentile rank?
Jane and John Doe are twins. Jane saves $10,000 per year from age 25 to 34 and nothing from age 35 onward (10 years of saving in total). John saves nothing from age 25 to 34 and $10,000 from age 35 to 64 (30 years of sav ...
1) A normal distribution has μ = 28 and σ = 5. (a) Find the z score corresponding to x = 23. (b) Find the z score corresponding to x = 41. (c) Find the raw score corresponding to z = -3. (d) Find the raw sc ...
Confidence intervals (CI) are one of the simpler forms of inferential statistics. What does the CI represent? And why does our knowledge of the Central Limit Theorem (CLT) and the empirical rule let us understand why the ...
If a wooden car has 30 independent components that all must function for the wooden car to operate successfully during a race, and the probability of successful operation for any single component is 0.999, what is the pr ...
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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