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To find out the mean, standard deviation and range.
Descriptive Statistics. The Range Rule of Thumb can be used to calculate quickly an approximate standard deviation for a raw data set. To apply the rule, follow the steps below:
(i)Find out the lowest and highest values. (ii) estimate the range. (iii) Divide the range by 4.
The reason why we finish our calculation by dividing range by 4 is that in most data sets 95% of the data values fall within two standard deviations of the mean.
Find the approximate standard deviation, s, for the following set of listed home selling prices. Show your method. Do not use Excel.
$125,500
$131,900
$188,900
$205,750
$181,500
$175,000
$144,800
$250,000
$235,850
$225,000
$248,500
$435,000
$457,500
$166,900
$399,000
$350,000
$221,000
$168,000
$325,000
$112,900
$145,600
$220,500
$140,000
$179,900
$125,900
$230,850
$385,000
$287,500
$121,900
$405,900
What is the probability that there will be more than three trucks either being loaded or waiting?
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
The Wilcoxon rank sum of the ranks for group and The value of the Wilcoxon signed rank statistic
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
An exam consists of 10 true or false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly six questions correctly? (Round the answer to three decimal places)
how many individuals will I need to sample if I want a 95% margin of error to be no more than 3%, I want to know if the results are significant at = 10%. With the information given.
The student body of a large university comprises 60% female students. Elucidate what is the probability that the students in the sample exactly two are female?
what is the required sample size is the error is to be less than 1/2 hour with a 95% level of confidence?
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
Here is a scatterplot of average crawling age versus average outdoor temperature six months after birth followed by a plot of the residuals versus average outdoor temperature six months after birth.
Find out the probability that: (a) The amount requested is between $65,000 or more?
To determine whether the mean is greater than 16 ounces using large sample test.
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