Suppose you start at a point, and every minute you flip a coin. If the coin is head you move 1 foot north. If it is tails you stay in the same spot.

At n minutes, what is the exact probability distribution of the number of feet north you have moved.

What is the standard deviation of the number of feet you have moved.

After 3000 minutes what is the approximate probability you’ve moved between 1470 and 1520 feel north?

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

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.

How can you check that you have correctly converted frequencies to relative frequencies?