The top speeds for a sample of five new automobiles are listed below. Calculate the standard deviation of the speeds. Round to four decimal places.170, 160, 130, 165, 125Group of answer choices238.091420.9165168.8935133.23

Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 55 mph . The highway patrol's policy is to issue tickets for cars with speeds exceeding 80 mph. The records show that exactly 1% of the speeds exceed this limit. Find the standard deviation of the speeds of cars travelling on California freeways. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.

Use the Empirical Rule to answer the question.A highway study of 6,000 vehicles that passed by a checkpoint found that their speeds were normally distributed, with a mean of 66 mph and a standard deviation of 7 mph.(a)How many of the vehicles had a speed of more than 73 mph? vehicles(b)How many of the vehicles had a speed of less than 45 mph?

Calculate the standard deviation for each stock. (Do not round intermediate calculations. Round the final answers to 2 decimal places.)

Part C 34. Consider the array speed = [99,86,87,88,111,86,103,87,94,78,77,85,86]. The given array contains the speeds of various type of car. Calculate the statistical features like mean, mode, median, standard deviation and variance. (K2-CO2)

A racing car consumes a mean of 114114 gallons of gas per race with a standard deviation of 77 gallons.If 4646 racing cars are randomly selected, what is the probability that the sample mean would differ from the population mean by greater than 11 gallon? Round your answer to four decimal places.