I have been given values for 10%, 50% and 90% of a distribution. From these numbers, how can I compute the mean and standard deviation? I'll give an example....Temperature distribution 10th...
I have been given values for 10%, 50% and 90% of a distribution. From these numbers, how can I compute the mean and standard deviation? I'll give an example....Temperature distribution 10th...
What sample size is required in order that the standard deviation of X(with bar) be: A. 1/4 of the population standard deviation? B. 1/7 of the population standard deviation...
On a reading comprehension test, it would be preferable to achieve a z score of a) 2.34 b) 3.50 c) 0.00 d) 1.00
For year 2003, the SAT test scores were normally distributed with a mean of 1050 and a standard deviation of 150.What percentage of the SAT scores is above 1050?
Im currently trying to understand addition and multiplication probability I just need some assistance for a clearer understanding
A paint manufacturer uses a machine to fill gallon cans with paint. a)The manufacturers wants to estimate the mean volume of paint the machine is putting in the cans within 0.25 ounces...
An urn contains red balls and white balls. If Frank chooses balls at random from the urn, what is the probability that he will select red balls and white balls? Round your answer to...
A history class is comprised of female and male students. If the instructor of the class randomly chooses students from the class for an oral exam, what is the probability that female...
8 people are running a race. How many results we can have, if first, second, and third place have to be filled?
A true false test contains 8 questions. In how many different ways the test can be completed?
Five different books are on a shelf. In how many different ways could you arrange them?
Unlike the mode or median, the mean is affected by a) only those observations that are middle-ranked. b) only those observations that occur most often. c) all those observations that are...
A peculiar die has the following properties: on any roll the probability of rolling either a , a , or a is , just as it is with an ordinary die. Moreover, the probability of rolling either...
heights of men on a baseball team have a bell-shaped distribution with a mean of 166 cm and a standard deviation of 9 cm. Using the Epirical Rule, what is the approximate percentage of the men between...
you're told that the shape of the distribution of burning times for light bulbs is balanced, with a mean burning time of about 1500 hours. therefore you can conclude that the median burning time: a)...
In an earlier study men with coronary heart disease has a mean systolic blood pressure of 148 mmHg with a standard deviation of 16.5 mmHg. You wish to repeat this study with a similar population of...
a) The probability that the null hypothesis is true is 0.01 b) The probability that the sample statistic shows the true relationship or parameter is 0.01. c) If the null hypothesis were true,...
A researcher has collected a large sample of IQ scores from his friends and relatives. He claims that because his sample is large and the distribution of his sample scores is very close to the bell...
In a particular game players spin a circular spinner split into 3 unequal regions. Half of the spinner is colored orange. A quarter of the spinner is green and the remaining quarter is blue. A)...
Social Statistics