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Is lack of sleep causing traffic fatalities? A study conducted under the auspices of the National Highway Traffic Safety Administration found that the average number of fatal crashes caused by drowsy drivers each year was 1500. Assume the annual number of fatal crashes per year is normally distributed with a standard deviations of 300.
a. What is the probability of fewer than 1000 fatal crashes in a year?
b. What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
c. For a year to be in the upper 5% with respect to the number of fatal crashes, how many crashes would have to occur?
Please use the regression procedure within Excel under Tools > Data Analysis to construct this equation.
A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 36. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places):
We are certain the the average difference in reaction times between the two light types for all golfers is between 0.27 and 7.13.
Hypothesis test for difference between two population variances - compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean.
What is the population mean? What is the best estimate of that value?
The manager of Sandy Corporation wants to determine whether or not the type of work schedule for her employees has any effect on their productivity. She has selected 15 production employees at random and then randomly assigned 5 employees to each ..
Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.
What would you predict the price per share to be if 95 million shares were offered?
Using one proportion z test to find whether or not to support the claim - There is little evidence to reject H 0 , therefore they conclude the tvs are 20 pounds on average.
To find out the test statistics utilizing chi square method. A professional bowler has been having trouble 'hitting the pocket' in order to get strikes.
Identify the independent and dependent variables. Perform a regression analysis on the data.
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
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