QNT 561 WEEK 4 STAT ASSIGNMENT - 89905

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QNT/561

Date

Instructor’s Name

Descriptive Statistics

Determine the appropriate descriptive statistics.

Note: If the data was normally distributed, use the mean and standard deviation. If the data was skewed significantly, use the median and interquartile range.

Numeric Variable Name1 – shift 1

Distribution: State if not normally distributed

 Central Tendency:  Mean = 997 Dispersion: Standard Deviation = 20 Number: Count = 59 Min/Max: 959 and 1034 Confidence Interval: (if distribution is normal) – 992 to 1002

Numeric Variable Name2 (if applicable)

Distribution: State if not normally distributed

 Central Tendency: Mean = 881.54 Dispersion: Standard deviation = 17.681 Number: Count=59 Min/Max: 847 & 913 Confidence Interval: (if distribution is normal) – 876.94 to 886.15

Attribute Variable Name (if applicable) – date

Create a bar chart. Describe the proportions.

Descriptive Statistics Interpretation

Numeric Variable Name1

Shift 1 – Shift 1 is the production (yield) w.r.t date. From the bar graphs we can see that there is high production in interval of 5-6 days. But with time, production keeps on decreasing. Like it was high initially in January but at the end of February it went down. Date represents period of time & rate of production.

Numeric Variable Name2 (if applicable)

Shift 2 – shift 2 is the production (yield) w.r.t. date. From the bar graphs we can see that Comparative low production is seen in shift 2 although in interval of 6-7 days peak is seen & with time it also decreased. As it was high in January but then in February it slightly got decreased. So date variable provided good information about highs & lows of production rate.

Appendix A

Raw data used in the analysis

Date

Shift 1

Shift 2

01-Jan-13

1000

890

02-Jan-13

1010

892

03-Jan-13

1030

910

04-Jan-13

999

883

05-Jan-13

1004

887

06-Jan-13

1

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