The appropriate statistical measure for the mean length of the screws in this sample is the D) Sample Mean.
The sample mean is calculated by summing up the lengths of all the screws in the sample and dividing it by the number of screws in the sample. In this case, Rachel measured the lengths of 100 screws and found that the mean length was 2.9 inches.
To calculate the sample mean, Rachel added up the lengths of all the screws in the sample and divided it by 100. This gives us the average length of the screws in the sample.
It is important to note that the sample mean is used when we have data from a sample and want to estimate the population mean. The population mean, on the other hand, represents the average length of all screws in the population. Since Rachel measured a sample of screws, the appropriate statistical measure is the sample mean.Answer:
Explanation: