Calculate the standard error of a sample mean.

Jacob was researching the number of hours the average adult sleeps each night. He collected data from five individuals:

Subject Hours of Sleep

Subject 1 6

Subject 2 6.5

Subject 3 6

Subject 4 7.5

Subject 5 5

Using the data above, what is the standard error of the sample mean? Answer choices are rounded to the hundredths place.

• a.)0.41
• b.)0.74
• c.)6.10
• d.)0.15