Which type of model best describes the relationship?
the table shows the relationship between time spent
running and distance traveled
running distance over time
linear, because the r value for the linear model is closest
to 1
time (minutes)
2
3
4
5
distance (feet)
530
1.050
1.600
2.110
2.650
exponential, because the r value for the exponential
model is closest to o
linear, because the rate of change between each pair of
points is exactly 520
exponential, because the rate of change between each
pair of points is 1.98

The weibull distribution is widely used in statistical problems relating to aging of solid insulating materials subjected to aging and stress. use this distribution as a model for time (in hours) to failure of solid insulating specimens subjected to ac voltage. the values of the parameters depend on the voltage and temperature; suppose α = 2.5 and β = 190. (a) what is the probability that a specimen's lifetime is at most 250? less than 250? more than 300? (round your answers to four decimal places.) at most 250 less than 250 more than 300 (b) what is the probability that a specimen's lifetime is between 100 and 250? (round your answer to four decimal places.) (c) what value is such that exactly 50% of all specimens have lifetimes exceeding that value? (round your answer to three decimal places.) hr