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The length of a particular telemarketing phone call has an exponential distribution with a mean equal to 1.5 minutes. Find the probability that the length of a randomly selected call will be between 30 - 50 minutes and 1 minuter or longer.
An American put option to sell a swiss franc for dollars has a strike price of $0.80 and a time to maturity of one year. The volatility of the swiss franc is 10%
Assume gasoline prices for a region are normally distributed. do the data you obtain provide enough evidence to reject the claim? use 1% level of significance.
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
A psychologist has designed a questionnaire to measure individuals' aggressiveness. Assume that the scores on the questionnaire are normally distributed with a standard deviation of 80.
test null hypothesis: Meu=80 against alternative hpothesis=negative = 80 (alpha =.05). What does this tell you about meu?
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. If you determine not to reject the null hypothesi..
The following frequency table summarizes the ages of 100 shoppers at the local grocery store. Compute the sample variance and standard deviation for this data set. Please show your work in Excel.
Given sample data arranged in a frequency distribution table. Use Excel to calculate the sample mean and variance from this data set.
Perform a contingency analysis on the data to determine if there is any dependency between the number of level of education attained by the father and the size of his family.
A class contains 30 students. Ten are female (F) and U.S. citizens (U); 12 are male (M) and U.S. citizens; 6 are female and non-U.S. citizens (N); 2 are male and non U.S. citizens. A name is randomly selected from the class roster and it is female..
We are asked to investigate the hypothesis that the number of crimes is related to police expenditures because states with higher crime rates are likely to increase their police force, thereby spending more on the number of officers on the street.
What is the equation for this regression model?
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