It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 120 feet. a transportation researcher wants to determine if the statement made in the advertisement is false. she randomly test drives 34 small cars at 65 miles per hour and records the braking distance. the sample average braking distance is computed as 115 feet. assume that the population standard deviation is 20 feet.
state the null and the alternative hypotheses for the test.

Write and solve a real word problem that involves determining distance on a coordinate plane

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms