explain: Before concluding that a “cause and effect” relationship may exist for a set of paired observations (X,Y), one must first rule out alternative explanations that seem...
explain: Before concluding that a “cause and effect” relationship may exist for a set of paired observations (X,Y), one must first rule out alternative explanations that seem...
Explain random sampling and why it is important.
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
It's most correct to view the normal curve as a) a batch of observations. b) a frequency distribution. c) an observed frequency distribution. d) a theoretical frequency distribution...
The time it takes a symphony orchestra to play Beethovens Ninth Symphony has a normal distribution with a mean of 64.3 minutes and a standard deviation of 1.15 minutes. The next time it is played...
The diameter of of hail hitting the ground during a storm is normally distributed with a mean of .5 inch and a standard deviation of .1 inch. What is the probability that: A)...
A random sample of size 2 is selected, with replacement, from the set of numbers (0,2,4) A. List all possible samples and evaluate X(with Bar) and S2 B. Determine...
Suppose the amount of a popular sport drink in bottles leaving the filling machine has a normal distribution with mean 101.5 ml and standard deviation of 1.6 ml. A. If the bottles...
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
1) CBS and the NYT conducted a national poll of 1048 randomly selected 13 to 17-year olds and counted how many owned smart phones. The reporters were trying to decide whether more than half of teenagers...
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...
If the normal curve is used to describe the distribution of IQ scores for all currently enrolled students in U.S. colleges and universities, all students are identified with the a) smooth normal...
In the 2010 World Cup, Paul the Octopus (in a German aquarium) became famous for being correct in all eight of the predictions it made, including predicting Spain over Germany in a semi-final match...
he amount of coffee that a filing machine puts into an 8 ounce jar is normally distributed with a mean of 8.2 ounces and a standard deviation of 0.18 ounce what is the probability that the sampling...
Forbes magazine published data on the best small firms in 2012. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported...
The weight of a checked suitcase at a particular airport has a mean of 18.5kg and a standard deviation of 3.5kg. 1) Find the standard deviation of the sample mean weight for a sample...
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...