speed of automobiles on a certain stretch of freeway at 11:00 PM are normally distributed with mean 65 mph. Twenty percent of the cars traveling at speeds between 55 and 65. What percentage of the...

speed of automobiles on a certain stretch of freeway at 11:00 PM are normally distributed with mean 65 mph. Twenty percent of the cars traveling at speeds between 55 and 65. What percentage of the...

This is from set of questions from elementary statistical methods.

In 1980 more than 35% of cars purchased had a manual transmission (i.e. stick shift). By 2007 the proportion had decreased to 7.7% . A random sample of college students who owned cars revealed...

please solve the equation out step by step

can you please give the equation used and give step by step detail solve it all the way put please

There is a lottery game that we are playing. We have to choose 6 numbers out of 49 that will hopefully match the 6 that are drawn. How many combinations of 6 numbers can be made out...

The claim is that the proportion of peas with yellow pods is equal to 0.25. The sample statistics from one expirement include 580 peas with 167 of them having yellow pods. Find the value of the test...

A $100,000 life insurance policy costs $600 for one year. If the probability that persons in the population from which the policy owner comes, lives for 1 year is .9985, do the calculations. What...

THIS IS A STATISTICS PROBLEM FROM AN ELEMENTARY STATISTICS BOOK. a ferry will saffely accomadate 66 tons of passenger cars. assume that the mean weight of a passenger car is 1.7 tons with standard...

49, 50, 60, 25, 35, 56, 6, 75, 140, 50, 42, 43, 94, 70, 39, 35, 50, 30, 15, 34, 25, 38, 38.5, 68, 8, 20, 26, and 40

data from 2010 suggests that 19% of all us adults smoke, and 14% of all us adults are males who smoke. if 48.4% of the adults in the us are make and we randomly select a us adult,determine the following...

I have no idea how to solve this. Someone please explain to me. 427 different women were randomly selected and asked what they buy online, and 162 of the women says clothes. If...

a researcher claims that the standard deviation of the number of deaths annually from tornados in the US is less than 35. If a random sample of 11 years had a standard deviation of 32, is the claim...

number of sales: 6 7 8 9 probability: 0.4 0.3 0.15 0.15

it has been reported that a standard deviation of the speeds drivers on the Interstate 75 near Findlay, OH, is 8 miles per hour for all vehicles. a driver from experience that this is very low. a...

Question/Problem: Data Set 1 in Appendix B lists the white blood cell counts (1000 cells/µL) of 40 randomly selected women. The mean of those 40 values is 7.15 and the standard deviation...

The manager of a large company claims that the standard deviation of the time (in minutes) that it takes a telephone call to be transferred to the correct office ub ger company is 1.8 minutes...

Listed below are the playing times (in seconds) of songs that were popular at the time of this writing. Find the (a) mean, (b)median, (c) mode, and (d) midrange for the given sample data. Is there...

Question: Identify the distribution (normal, Student t, chi-square) that applies to each of the following situations. (If none of the three distributions is appropriate, then so state.) a...

Question/Problem: Data Set 1 in Appendix B lists the white blood cell counts (1000 cells/µL) of 40 randomly selected women. The mean of those 40 values is 7.15 and the standard deviation is 2...