Confidence the proportion of all americans
In a random sample of 740 Americans, 33.5% indicated that they've a cat for a pet. Determine with 94% confidence the proportion of all Americans that have cats as pets. (Give the confidence interval in percentages.)
Confidence Interval= ?%
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Determine the primary advantages of the Standard Normal Distribution that other normal distributions do not have?
From an edge of the 1000-foot cliff, angles of depression to two cars in valley below are 21* and 28*. How far apart are cars? Round the answer to nearest 0.1 ft.
The flagpole is perpendicular to horizontal but is on the slope which rises 10 degree from horizontal. Pole casts the 43-foot shadow down slope and angle of elevation of sun measured from slope is 36*. How tall is pole?
A national exam is given yearly to fifth graders. At one school they found 3 to 5 times as many erasures as at other schools, and 89% of those erasures resulted in correct answers as compared to less than 70% for other schools. Has there been tamp
For any generic t-test for independent groups, write down the null and alternative hypotheses that are appropriate at alpha =.05 (2 tail). Write a verbal and an equation version.
Given that a continuous random variable X has normal distribution with = 60 and = 4 Find the following probability.
Assume x is difference between price scanned and price marked on item, and y is amount refunded to customer. Write the formula for y in terms of x.
Let U be a uniform random variable on the interval [0,1]. Let X= U^1/5. Find a function g(x) so that g(U) is an exponential random variable with parameter λ, and prove it is.
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