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Given a normal distribution with µ =50 and σ =4, what is the probability that a. X > 43?b. X < 42?c. 5% of the values are less than what X values?d. Between what two X values (symmetrically distributed around the mean ) are 60 % of the values?
The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.2 miles per gallon. A. What is the probability that a randomly selected hybrid gets m..
A traffic engineer is studying a stretch of road on a rural highway. At his observation point, an average of 12 vehicles per hour pass. The vehicles are independent of each other. 1. What is the probability that fewer than 5 vehicles pass betwee..
What statistical test should be used to analyze these data - How can internal and external validity be increased in an experiment and briefly describe the type of information that should be in an introduction.
Find the probability the mean of the sample and the only adjustment might be using the p-value from a computer program (like SAS), rather than writing a rejection region.
a. Calculate the range and the standard deviation. (Use either definition for the range) b. Add 2 points to each score and compute the range and the standard deviation again. Describe how adding a constant to each score influences..
The Center for Epidemiologic Studies Depression Scale (CES-D scale) is often utilized to measure depressive symptomology (Radloff, 1977). It is a self-assessment that is completed by the individual. The CES-D contains 20-items rated on a 4-poin..
natural gas spot and future pricesthe law of one price implies that the spot price and the future price of a commodity
What research design was used this study
The shelf life of a battery produced by one major company is known to be Normally distributed, with a mean life of 4 years and a standard deviation of 1 years.
Whats the temperature
The telephone bills send via regular mail
Obtain an output (as in the tutorials).
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