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The Boeing 757-200 ER airliner carries 200 passenger and has doors with a height of 72 in. .Heights of men are normally distributed with the mean of 69.0 in. and a standared deviation of 2.8in a. if a male passsenger is randomly selected , find the probablity that he can fit through the doorway without bending .B if half of the 200 passengers are men . find the probalitity that the mean height of the 100 men is less than 72 in.c. When considering the comfort and safety of the passenger which result is more relevant . the result from (a) or the probability from part (B) ? Pls explain why d. when considering the comfort and safety of passengers why are women ignored in this case ?
Construct a 95% confidence interval for the true proportion of the market who still refuse to visit any of the restaurants in the chain three months after the event.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Are mean crash damages the sa..
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
Decileter and standard deviation of 41 mg/dl. in an srs of 100 men what is the probability that x bar takes a value between 185 and 191 mg/dl?
Explain why the t distribution is used as a part of the confidence interval.
Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
Could the interval be used to estimate the mean amount of time a 9-year-old American spends eating & drinking each day. Explain.
One table has a standard deviation of $50 while the other has a standard deviation of $150. What conclusion can be drawn from the data?
Suppose the sample variance for 3 parts turns out to be S2 = .0005. Use a=.05 to test whether the population variance specification is being violated.
The number of shark attacks per year in the US is distributed approximately normal, with a Variance of 31.8 and a standard deviation of 10.
These data represent the ages of drivers and the number of accidents reported for each age group in Pennsylvania for a selected year. Find the equation of the regression line for the given data.
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
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