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1. In the previous problem, the time that it takes the airbag to completely ?ll up from the moment of activation has an exponential distribution with mean 1 second. What is the probability that the airbag will ?ll up in less than 1/2 second?
2. The time interval between two successive customers entering a store in a mall is exponentially distributed with a mean of 6.55 seconds.
a. What is the probability that the time interval is more than 10 seconds?
b. What is the probability that the time interval is between 10 and 20 seconds?
c. On a particular day a security camera is installed. Using an entry sensor, the camera takes pictures of every customer entering the shop. It needs 0.75 second after a picture is taken to get ready for the next picture. What is the probability that the camera will miss an entering customer?
d. How quick should the camera be if the store owner wants to photograph at least 95% of entering customers?
You choose random sample of 50 cans, and mean amount of paint per 1-gallon can is 0.995 gallon. Is there evidence that mean amount is different from 1.0 gallon (use α=0.01).
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
suppose that three parachutists operate independently lands at a random point on a line between markers a and b. what
1.an experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield.
The following data are daily price quotations of two stocks: Stock A: 12.50, 12.75, 12.50, 13.00, 13.25, 13.00, 13.50, 14.25, 14.00. Is there a correlation between the two stocks? Explain.
1. the probability of being left handed is 10. you will sample 10 people what is the probability that you sample people
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
Dinner B which costs $135.30 for dinner submitted by salesperson with mean cost of $117.50 and standard deviation of $30 per dinner?
A doctor wants to know if there is a relationship between a father’s weight and his first newborn son’s weight. Perform a hypothesis test at Alpha = .01, using table I
Suppose an unrelated 77-year old man, 76 - year old woman, and 82- year old woman are selected from a community. What is the probability that all three of these individuals have Alzheimer's disease?
If a time series is stationary without a linear trend or the seasonal component, which of the following forecasting methods may be suitable.
What is the best prediction for the number of complaints that will be registered for an installer who takes five sick days during the period and correlation between number of sick days and number of customer complaints statistically ..
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