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A recent poll of 700 people who work indoors found that 278 smoke. If the researchers want to be 98% confident of their results to within 3.5 percentage points, how large a sample is necessary?
Statistics and Probability, Statistics
Identify and describe the six types of e-commerce. Give an example for each one.
Data collected over a long period of time showed that a particular genetic defect occurs in 1 of every 1000 children. Let X be the random variable "number of children with genetic defect in a sample of 50,000 children ex ...
A survey asks 20002000 ?workers, "Has the economy forced you to reduce the amount of vacation you plan to take this? year?" FiftyFifty?-fourfour percent of those surveyed say they are reducing the amount of vacation. Twe ...
The STAT 200 course coordinator wants to estimate the proportion of all online STAT 200 students who attend Penn State Learning tutoring sessions. In a survey of 72 students during the Summer 2018 semester, 8 had attende ...
Calculating this answer for my Statistics class: A hockey team conceded 18 goals on average per season. What is the probability that the team concedes 10 goals? This was my answer and it was incorrect, so I want to know ...
Doctoral assistant ships of Ph.D students 50% have paid assistant ships. a random sample of n=200 students is chosen.. based on this sample and using the properties of the binomial distribution, what is the approximate s ...
If the probability of either outcome A or outcome B arising during a single random process is 0.4 and we also know that the probability of outcome A is 0.2 while the probability of outcome B is 0.3, how are these two out ...
A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation σ = 30. (a) How large must n be if the length of the 95% CI ...
You work for a firm that manufactures DVD players. Your DVD players last an average of 800 days with a standard deviation of 200 days. You want to set the warranty length such that you only have to replace 1.5% of all th ...
Lee Smith Imports paid a $1.00 per share annual dividend last week. Dividends are expected to increase by 5% annually. What is one share of this stock worth to you today if the appropriate discount rate is 14%? a. $7.14 ...
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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