A large number of children were surveyed. The table below shows the distribution of the time they spent watching TV in the week before the survey. Intervals include the left endpoint but not the right. You can assume that the times are uniformly distributed within each interval. The table is used to draw a histogram of the distribution.
Find the height of the bar over interval 4-8, in percent per hour. Please do not enter units of measurement.
Estimate the 80th percentile of the distribution of times, in hours; give the best estimate you can, based on the information in the problem. Please do not enter units of measurement.
I do hope you got the mark you deserved in the test, "Andrea".
To find the height of the bar over the interval 4-8 in percent per hour, we need to look at the table provided. However, since the table is not given, we cannot provide the exact answer without the specific information from the table.
To find the height of the bar over the interval 4-8, you would need to determine the number of children who fall within that interval and divide it by the total number of children surveyed. Then, multiply this fraction by 100 to convert it to a percentage.
As for estimating the 80th percentile of the distribution of times, we need to have more information about the data. Without knowing the specific intervals and the number of children falling in each interval, we cannot accurately estimate the 80th percentile. Typically, to find the percentile, you would need the actual data values rather than just interval ranges.