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The reaction time (in seconds) to a certain stimulus is a continuous random variable with pdf
a. Obtain the cdf.
b. What is the probability that reaction time is at most 2.5 sec? Between 1.5 and 2.5 sec?
c. Compute the expected reaction time.
d. Compute the standard deviation of reaction time.
e. If an individual takes more than 1.5 sec to react, a light comes on and stays on either until one further second has elapsed or until the person reacts (whichever happens first). Determine the expected amount of time that the light remains lit.
IQ scores are normally distributed with a mean of 100 and a std dev of 15. If 25 people are randomly selected for an IQ test, find the probably that their mean score is between 95 and 105.
To guarantee that cans of soda are properly filled, some cans are sampled and the amounts measured. The overall average for the samples is 12 ounces.
According to the historical data, the life expectancy in the United States is equal to the life expectancy in Japan. A new study has been made to see whether this has changed.
Develop the "best" regression model possible using this set of variables to help you predict the Risk. State your final model. Interpret the coefficients for the model (i.e. what do the numbers mean?). Finally, tell me how to use this model for pr..
The following information is obtained from two independent samples.
Perform a parametric analysis by assessing the fractional change in the probability of failure with respect to a small change in the mean and standard deviation of selected variable.
The standard deviation is 2 pounds. If 15% of the suitcases are overweight, Determine the maximum weight allowed by the airline. Assume the variable is normally distributed.
Find and interpret the probability that exactly 15 of those surveyed feel the state of morals is poor. The probability that exactly 15 of those surveyed feel the state of morals is poor is What?
the observed rate of drinking was the same in both cases although the sample size of the latter was twice as big. The critical region {X ¯>c} and p-value for the two cases are respectively?
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
Level of significance, can we conclude that there are differences in the perceptions for marketing managers, marketing research specialists, and advertising specialists. Use Fisher's LSD approach to determine where the differences occur.
During the gestation period of 28 weeks, what percent of the babies born within each gestation period have a low birth weight (under 5.5 lbs)?
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