Hi there could anyone help me with questions and answer it on Excel with full explantion...
Hi there could anyone help me with questions and answer it on Excel with full explantion please.
| You've taken an internship with the Moscow Police Department and are analyzing crime rates to see if MPD wants to shift | |||||||||||
| patrols from a low crime area to an increasing crime area. | |||||||||||
| Month | Crimes | Sample | |||||||||
| Size | |||||||||||
| January | 7 | 1000 | |||||||||
| February | 9 | 1000 | |||||||||
| March | 7 | 1000 | |||||||||
| April | 7 | 1000 | |||||||||
| May | 7 | 1000 | |||||||||
| June | 9 | 1000 | |||||||||
| July | 7 | 1000 | |||||||||
| August | 10 | 1000 | |||||||||
| September | 8 | 1000 | |||||||||
| October | 11 | 1000 | |||||||||
| November | 10 | 1000 | |||||||||
| December | 8 | 1000 | |||||||||
| a. Construct a p chart using a 95% confidence level (2 standard deviations above/below the mean) and plot the year's | |||||||||||
| data | |||||||||||
| b. You've collected data for the first three months of the following year. In analyzing this data, what comments can you | |||||||||||
| make regarding the crime rate? | |||||||||||
| Crime Incidence | Sample Size | ||||||||||
| January | 10 | 500 | |||||||||
| February | 12 | 500 | |||||||||
| Marcy | 11 | 500 | |||||||||
Homework Answers
For a p chart
pbar = no of defects / no of samples x sample size =100 /12x1000 = 1/120 = 0.00833
UCL = npbar + 2 [ npbar ( 1-pbar)/n]1/2 = 8.33 + 2 [ 8.33 ( 1-0.00833)/1000]1/2 = 8.33+0.18 = 8.51
LCL = npbar - 2 [ npbar ( 1-pbar)/n]1/2 = 8.33 -0.18 = 8.15
Chart
b. From the first three
months' observation, it can be concluded that the crime rate has
increased manifold, with 20, 14 and 22 in the firs three months of
the year in comparison to what was 7,9 and 7 last year during these
months.
Add Answer to:
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