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The average travel time to work for New York City residents is 36.5 minutes (Time Almanac, 2001). Suppose that the exponential probability distribution applies.
Consider the experiment where you toss two coins and notes outcome (H or T) of each. Which of the following mapping to a random variable X are allowable?
A personnel manager at the large firm needs to determine the mean length of stay,? of its employees. She takes a random sample of employees and finds out the sample mean () to be 25 years.
Determine the probability of fewer than 1,000 fatal crashes in a year (to 4 decimals)? Determine the probability the number of fatal crashes will be between 1,000 and 2,000 for a year (to 4 decimals)?
Perform appropriate t-test to compare the mean systolic blood pressure between two populations using ?=0.05. You may suppose that the variances of two populations are equal. What do you conclude?
Also, if instead, left-handed females make up 6% of population, determine the conditional probability that randomly selected subject is left-handed, given that the subject is male?
Please explain the process of how you find out the cut-off value for a t-test(t critical) and F test (F critical)? Look up the cutoff value for a t-test with df=15, p=.05 with a one-tailed test.
A study was performed in Basel, Switzerland, on relationship between the concentration of plasma antioxidant vitamins and cancer risk. Below shows data for plasma vitamin-A concentration for stomach
Find out the z-score corresponding to a score of X = 100 for each of the following distributions:
A study of high-crime locations in Miami, Florida, was conducted. The number of crimes in each of eight sample areas throughout a one-year period was recorded. Then a neighbourhood watch program was
Police recorded the average speed of cars driving on busy street by school. For sample of 36 speeds it was determined that the average amount over the speed limit was 12.3 mph with standard deviatio
A survey was conducted of age in years of 50 randomly chosen customers. The mean was 27.47 years and standard deviation was 10.69 years.
One hundred unordered samples of size two are drawn without replacement from urn containing size red chips and four white chips. Test the adequacy of hypergeometric model if zero whites were obtaine
If we have the simple linear regression model and 95% confidence interval of data we want to determine, how do we find out the 97.5th and 2.5th percentile?
A researcher tested both brands of medicine on two groups of randomly chosen patients. The results of test are given in the following table. The mean and standard deviation of relief times are in mi
A confidence interval for price of gasoline from the random sample of 40 gas stations in region gives the statistics below.
The following data was collected to determine whether or not Monroe County College students work 18 hours per week:
A real estate company thinks the commerce department's claim isn't correct and randomly surveys 144 apartment dwellers and finds out that their average rental is $878, with standard deviation of $85
Police recorded average speed of cars driving on busy street by school. For a sample of 36 speeds it was determined that the average amount over speed limit was 12.3 mph with standard deviation of 5
Write down a results section in APA style for following confidence interval estimates. The APA style results section must include:
Let X be a discrete random variable with probability mass function p given by
Currently for base Year 2008 in Missile Procurement Appropriation, the FY 2011 raw index is 1.08 and FY 2011 wighted index is 1.14. Determine the proper amount you should request in the budgt for th