6 Calculating Standard Error of a Sample Mean

Calculate the standard error of a sample mean.

The daily high temperatures, in degrees Fahrenheit, of Des Moines for one week were:

Day	Temperature (inFahrenheit)
Monday	64.5
Tuesday	64
Wednesday	66.5
Thursday	64
Friday	62.5
Saturday	61
Sunday	63

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

• a.)0.25
• b.)9.09
• c.)1.53
• d.)0.65