NEED HELP WITH ANY OF THE QUESTIONS YOU CAN ANSWER Open the data plotting tool. The life spans of 150 CFLs are shown in the plot window. Use this data and the histogram to answer the questions that follow.

Part A
Click the Plot button, and use the displayed data in the histogram to determine the mean life span (in hours) of the new sample of CFLs. Write your result to the nearest whole hour.

Part B
Assuming that the sample mean is a point estimate of the population mean, determine whether the first criterion for shipping (average life span) has been met.

Part C
Scroll through the data values and count the number of CFLs that have a 0 life span, that is, the number of defective lamps, and write down your result.

Part D
Calculate the proportion of defective CFLs in the test sample.

Part E
If we assume the sample proportion is a point estimate of the whole population, has the second criterion for shipping a batch (proportion defective) been met?