The lifespan of a certain electronic toy is normally distributed, with a mean of 3000 hours and a standard deviation of 35 hours. Use a standard normal distribution table
or a graphing calculator to find the proportion of toys that have a lifespan between
2920 hours and 2945 hours.

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

the mean and mad

step-by-step explanation:

4.6875 pounds

step-by-step explanation:

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.