1 2. A ship uses SONAR equipment to make a survey of a freshwater lake bed. A signal is sent by the device and received 2.05 s later. The speed of sound
in fresh water is 1482. How deep is the lake at that point?
depth =
m

Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47