# Posts by Statistics

Total # Posts: 19

**Statistics**

For the data set (−2,−3)(1,3)(5,4)(9,7)(11,12) find interval estimates (at a 94.6% level) for a single observation and for the mean response of y corresponding to x=1. Note: For each part below, your answer should use interval notation. Prediction Interval for ...

*April 19, 2015*

**Math: statistics**

A DVD rental store wants to know what proportion of its customers are under age 21. A simple random sample of 500 customers was taken, and 375 of them were under age 21. Presume that the true population proportion of customers under age 21 is 0.68. Find the mean and standard ...

*April 12, 2015*

**Geometry**

(2x+5)(x-3)

*May 14, 2014*

**Statistics**

A study found that 82% of elementary students buy lunch at school at least once a month. How large a sample would be necessary to estimate the true proportion within four percentage points with 95% confidence

*May 14, 2014*

**statistics**

Your samle is normally distributed with a mean age of 57. The standard deviation iin this sample is 5 years.The 2000 census shows your sample is older than a randomly selected national sample. The median agein your sample is?

*June 3, 2013*

**Finance**

Clanton Company is financed 75 percent by equity and 25 percent by debt. If the firm expects to earn $30 million in net income next year and retain 40% of it, how large can the capital budget be before common stock must be sold?

*August 13, 2011*

**Sample**

Recall that “very satisfied” customers give the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to us the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean ...

*June 13, 2011*

**Steve**

I have no idea how to do this: h t t p : / / t i n y u r l . c o m / y f e 9 8 s d

*October 19, 2009*

**Statistics**

r^2 the corelation squared measures how well the y hat is than just using y bar or the other way around... I don't remeber what r^2 measures I have what it means on my calculator but I still don't understand it My teacher told me it's basically somehting like how ...

*October 7, 2009*

**Statistics**

A density curve like an inverted letter "V" The first segment goes from the point (0, .6) to the point (0.5, 1.4). The second segment goes from (.05, 1.4) to (1, .6) Find the percent of the observations that lie below .3 I have no idea how to do this If you could ...

*September 23, 2009*

**Statistics**

is the standard deviation a measure of the center or distribution... my teacher told me center i read the article and i\'ve been lead to believe its a measure of the distribution not the center... if it is a measure of the center how is it? I think it\'s a measure of ...

*August 30, 2009*

**Statistics**

How is finding the standard deviation a measurement of a data\'s center? my teacher said it measured the center...

*August 28, 2009*

**statistics**

I'm not following this problem at all I understand the terms such as median quartile and such but I just don't understand stocks so can you lend me a hand The rate of return on a stock is its change in price plus any dividends paid, usually measured in percent of the ...

*July 30, 2009*

**statistics**

I'm not following this problem at all I understand the terms such as median quartile and such but I just don't understand stocks so can you lend me a hand The rate of return on a stock is its change in price plus any dividends paid, usually measaured in percen of the ...

*July 29, 2009*

**statistics**

I'm not following this problem at all I understand the terms such as median quartile and such but I just don't understand stocks so can you lend me a hand The rate of return on a stock is its change in price plus any dividends paid, usually measaured in percen of the ...

*July 28, 2009*

**statistics**

using the numbers only 0 through 10 only whole numbers with repeats allowed pick four numbers that would have the smallest standard deviation I said four zeros pick four numbers that would have the largest standard deviation I said 0 0 0 10 is there more than one correct ...

*July 28, 2009*

**statistics**

ok i was given a set of data asked to create a graph of my choice to represent the data then i'm asked Does the sahpe of the distribution allow the use of the mean and the standard deviation to describe it? ok how does the mean and the standard deviation effect the shape ...

*July 23, 2009*

**statistics**

when the mean is slightly larger than the median does that mean the data is slightly skewed to the left, the right, or neihter?

*July 17, 2009*

**statistics**

basically i'm at the begining of the text book doing summer work it's talking about mean and stuff asked to find the mean of a set of data and given 14 different numbers the question then goes on and tells me a fifteenth number is added to the set of data with the ...

*July 15, 2009*

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