Restaurant Delivery Times (SnowPea)

By: Craig Santoski

Cortny Sasserson

Number of Orders (Per Driver)

1 2 3 40

5

10

15

20

25

30

25

18 17 16

Total

Deliverer

Num

ber o

f Ord

ers

1 2 3 40

1

2

3

4

5

6

7

8

5.5

7.36.7

5.9

Average Delivery Distance (Per Driver)

Series1

Deliverer

Dis

tanc

e (In

Mile

)

1 2 3 40

5

10

15

20

25

12.2

14.7

19.720.7

Average Travel Time (Per Driver)

Series1

Deliverer

Ave

rage

Tim

e (In

Min

utes

)

Question 1:A.) Isolating the number of deliveries within a ten miles radius, is SnowPea currently able to achieve their desired delivery time of 25 minutes or less?

Hypothesis Testing:• Sample Mean: 14.1 minutes• Population Mean (reference): 25 minutes• Standard Deviation: 7.95• Sample Size: 63• NULL (μ>=25): SnowPea is not achieving desired delivery time.• ALTERNATIVE (μ<25): SnowPea is achieving desired delivery

time.

Calculation/Conclusion

• One-Tailed • Test Statistics (obs): -0.37• Critical Measure: 1.64• |obs| > critical? No• P-value: 0.36• α-level: 0.05• P-value < A-value? No

• Do not reject the NULL!

B.) How likely is it that SnowPea doesn’t meet the on-time requirements? Given this likelihood, out of 100 deliveries, how much in gift certificates will the restaurant be giving out?

Calculation:63/76 deliveries within 10 miles radius.7/63 deliveries over 25 minute travel time.

7/63=.11 or 11%

.11* 100(deliveries)= 111*($10) = $111

Question 2:Calculate the speed for each order (distance/travel

time*60=mph). Compare each driver to this average speed…does it appear that any of the drivers are driving SLOWER than

average? Which ones?

Average Speeds• Average Speed(all orders) = 24.29• Driver 1 = 25.28• Driver 2 = 30.08• Driver 3 = 21.18• Driver 4 = 17.66

Average Speed of Each Driver Compared to Total Average Speed

17.66 21.18 24.29 26.61 30.140

5

10

15

20

25

30

35

Driver 1Driver 2Driver 3Driver 4Total Average Speed

Hypothesis Testing

• Driver 3• Sample Mean = 21.18• Population Mean = 24.29• Standard Deviation = 8.75• Sample Size = 76• NULL: Driver 3 is like the other drivers. • ALTERNATIVE: Driver 3 is not like the other

drivers.

Driver 3

• Two-Tailed• Test Statistics(obs) -3.10• Critical Measure 1.64• |obs| > critical? Yes• P-value 0.00• α-level 0.10• P-value < A-value? Yes• Reject the NULL

Hypothesis Test

• Driver 4• Sample Mean = 17.66• Population Mean = 24.29• Standard Deviation = 8.75• Sample Size = 76• NULL: Driver 4 is like the other drivers.• ALTERNATIVE: Driver 4 is not like the other

drivers.

Driver 4

• Two-Tailed• Test Statistics(obs) -3.10• Critical Measure 1.64• |obs| > critical? Yes• P-value 0.00• A-level 0.10• P-value < A-value? Yes• Reject the NULL

Summary/Recommendations: • SnowPea is not achieving its desired delivery time of

25 minutes.• Every 100 deliveries, $111 in ($10) gift certificates.• Delivery drivers 3 and 4 are not like the other drivers,

slower.

In order to achieve success, Snowpea must remove or improve the performance of drivers 3 and 4.

QUESTIONS?