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The life times, Y in years of a certain brand of low-grade lightbulbs follow an exponential distribution with a mean of 0.55 years. A tester makes random observations of the life times of this particular brand of lightbulbs and records them one by one as either a success if the life time exceeds 1 year, or as a failure otherwise.
Part a) Find the probability to 3 decimal places that the first success occurs in the fifth observation.
Part b) Find the probability to 3 decimal places of the second success occurring in the 8th observation given that the first success occurred in the 3rd observation.
Part c) Find the probability to 2 decimal places that the first success occurs in an odd-numbered observation. That is, the first success occurs in the 1st or 3rd or 5th or 7th (and so on) observation.
A manufacturer of flashlight batteries took a sample of 13 batteries from a day's production and used them continuously until they were drained. In what ways would this information be useful to the manufacturer?
Briefly explain how sample size affect outcome of hypothesis test. How does sample size affect measures of effect size?
what is the probability that ms. a mr. b and mrs. c win the rst second and third prizes respectively in a drawing if
mitch thinks that there is a difference in quality of life between rural and urban living. he collects information from
If appropriate, use the Marascuilo procedure and α = .01 to determine which, if any, year groups are significantly different in the proportion of passengers who book tickets online.
A survey conducted by the American Automobile Association showed that the family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls results in a sample mean of $252...
your factory receives 3 lots of screws. there are 100 screws in lot 1 200 in lot 2 and 300 in lot 3. lot 1 contains 1
Consider the experiment of tossing a fair coin three times and observing the number of heads that result (X = number of heads).
Gives the exact chance the total time is more than 16 minutes. 5) 6.14 Comment on the shape, what distribution is a reasonable t? 6) 6.30 Comment on the shape, same as the stef and leaf?
Construct a scatterplot and identify the mathematical model that best fits the given data. Assume that the model is to be used only for the scope of the given gata, and consider only linear, polynomial (degree 2) logarithmic, exponential, and powe..
based on interviews with 83 sars patients researchers found the the mean incubation period was 4.3 days with a standard
sample methods identify which of the following applies simple random systematic conveniencestratified or cluster sample
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