The number of traffic accidents that occur per week in a large city during the summer months has a Poisson distribution withλ=7.3.  a) Find the probability that the number of accidents in a given week is: i) exactly 3 ii) at most 1 b)What is the variance and standard deviation of the number of weekly traffic accidents? (round to 1 decimal place) Variance= Standard deviation=

Assume the random variable X is normally distributed with mean 50 and standard deviation of 7.  What is the 86th percentile?

Assume that you have been provided the following information for a sample of cars The covariance between weight and miles per gallon is equal to -4.9 pound-miles. The standard deviation of the cars' mileages is 7.75. The standard deviation of the cars' weights is 0.94. Estimate the correlation coefficient to the first decimal place.

The frequency distribution table below is the net weight of a sample of candied fruit products in the food industry cans "ABC": - How many cans have a net weight of less than 20.2 grams. - If we want to compare about the distribution of net weight with the food company "XYZ" for the same type of product. And it is known that the average and variance is 20 grams and 0.04 grams. Which food company has an even distribution of net weight.