A Large School District in Southern California Asked All of Its

Multiple Choice

A large school district in southern California asked all of its eighth-graders to measure the length of their right foot at the beginning of the school year, as part of a science project. The data show that foot length is approximately Normally distributed, with a mean of 23.4 cm and a standard deviation of 1.7 cm. Suppose that 25 eighth-graders from this population are randomly selected. The distribution of the mean foot length in samples of 25 students is approximately Normal; what are the mean and standard deviation?

A) Mean = 23.4 cm and standard deviation = 1.7 cm
B) Mean = 23.4 cm and standard deviation = 0.34 cm
C) Mean = 23.4 cm and standard deviation = 0.068 cm
D) Mean and standard deviation are unknown.