Pon Mash :Etary Seatitin Ota #2: 2.1-22, 3.1-3.2 Student Name contains 2 questio
ID: 3369001 • Letter: P
Question
Pon Mash :Etary Seatitin Ota #2: 2.1-22, 3.1-3.2 Student Name contains 2 questions and 20 total points. The intended duration of this quiz is 15 minutes. Read very carefully arn k to receive full credit. To be graded accurately, please make sure that your handwriting is le outside the box. Round your answer to the nearest three decimal places, if necessary. Show all wor 1) The commuting times (in minutes) of an employee for 4 consecutive days are listed below. (10 point 69 e s 9 8 a. Find the sample mean. (2 points) b. Find the sample variance. (4 points) Find the sample standard deviation. (2 points) c. d. Find the minimum and maximum. (1 point) e. Find the range. (1 point)Explanation / Answer
1)
a. Sample mean =( 4+9+8+3 ) / 4 =24 / 4 = 6
b . Sample variance = ( ( 4 - 6 )2 + ( 9 - 6 )2 + ( 8 - 6 )2 + ( 3 - 6 )2 ) / ( 4 - 1 ) = 8.6667
c. sample standard deviation = square root of sample variance = ( 8.6667 )0.5 = 2.944
d. Minimum = 3 and maximum = 9
e. Range = maximum - minimum = 9 - 3 = 6