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In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 47 mph and that the standard deviation was 15 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal.
(a) Roughly what proportion of vehicle speeds were between 32 and 62 mph? (Round the answer to the nearest whole number.)
(b) Roughly what proportion of vehicle speeds exceeded 62 mph? (Round the answer to the nearest whole number.)
Company wishes to exceed on-time rate of competitors at new hub. Hundreds of flights arrive at location daily. Determine the main advantages and disadvantages of employing sampling in application?
Independently of all the others. The system is operational if no two adjacent lamps fail. Obtain an expression for system reliability.
If 25 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is less than 44.24 tons. Assume that the variable is normally distributed.
Number of STAT 200 textbook bundles you would order so that you stay below 5% probability of having to back-order from Pearson Custom Publishing?
Standard deviation of this poll is 4%. What would be standard deviation if sample size were increased from 83 to 190?
Develop a frequency distribution table with proportions. What is an experiment? Can you describe what a Group Frequency Distribution Table is and what it looks like?
Find the probability that a standard normal random variable will assume a value between: Find a z such that 70% of the area is above that value.
amandas bicylce lock can be opened when 4 different levers are placed opposite their correct digit. each lever can be
car size m3bodyyearyear9.941small cars2003less than 200510.251small cars1996less than 200510.699small cars2012greater
Determine the mean and the standard deviation of the sample.
in a survey of top executives it was found that 46 had either traveled internationally on business orcould fluently
There are two car dealerships in a particular region. The mean monthly sales at the two dealerships are about the same. Though, one of the dealerships (dealership A) is boasting to corporate headquarters that his dealership's monthly sales are mor..
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