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Problem: A researcher would like to estimate the proportion of all children that have been diagnosed with Autism spectrum disorder in their county. They are using 95% confidence level and the CDC national estimate that 1in 68 ~ 0.0147 children are diagnosed with ASD. What sample size should the researcher use to get a margin of error to be within 2%? Round up to the nearest integer
Prior to 2001, the operating system used by Apple for Macintosh desktop computers was completely proprietary. In 2001, Apple introduced a new operating system (OS X) based on Unix.
Chocolate chip cookies resulted in the following calorie amounts. At the a _ 0.01 level, is there sufficient evidence that the average calorie content is greater than 110 calories?
What are the appropriate conditional proportions to study if we want to compare the rates of heart attacks for the two treatment groups? Do these proportions turn out to be quite different.
At the end of class, our teacher said "If you're perceptive, you may have noticed that a regression analysis produced by the Excel Data Analysis ToolPak contains an ANOVA table.
What is the expected value and variance of daily revenue (Y) from the machine, if X, the number of cans sold per day has E(X)=125, and Var(X)=50?
Compare the types of cars sold in 1985, 2000, and 2007 as shown in the figure. (Source: 2009 World Almanac and Book of Facts)
after years of collecting sports cards our friend nick decides to open a shop. he sells packs of cards but he focuses
As a manager of an organization, what statistics would you use and why if you wanted to estimate your annual employee turnover? Be sure to specifically identify the statistical formulas and what additional data you would need to determine your est..
is there a relationship between these two measurements for the size of the 30 major league baseball stadiums?a. before
In forecasting, MacDonald's Wing® discovered that when it opened its store to the public, it was able to sell 5,000 parachutes in the first year. Given the equation; y=a+bx. Where ‘y' represents the number of sales and ‘a' is the number they start..
Find the z-score boundaries that separate a normal distribution as described in each of the following: the middle 20% from the 80% n the tails.
What is the 95% confidence interval for the mean number of microwaves sold at a retail store in the chain last week?
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