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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?
For a random sample of 50 batteries, what is the probability that the sample mean will be less than 27.5 hours?
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? Compute the value of the test statistic.
Determine the rejection region for the test of Ho: (mean 1 - mean 2) > 2.43 Use a = 0.04. z >
Is this an ideal data collection method? Can the results be considered reliable? Can the gathered data be representative of the population?
Scientist would like to know if mental health clients of private versus public service agencies differ on Global Assessment of Functioning (GAF) scores and on Satisfaction with Services (Satisfaction). She has collected data for 34 clients from a ..
If a technical breakthrough occurred that raised the profit per unit of X 1 to $3, would this affect the optimal solution?
Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Determine the probability that computer will fail within 12 months?
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Find out equation of the line of best fit. Find out r - Is there a strong relationship?
Findout the probability using normal approximation for the provided values. Findout the specified probability from a table of Normal probabilities.
Compute an F-statistic for each linear construct and determine its significance.
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