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Speedy Delivery Services claim to have a 90% at least satisfactory' rating. They hire a new delivery driver called Steve. After his first 1000 deliveries, a random sample of 25 of his deliveries is selected. Of these 25 deliveries, 24 are rated as 'at least satisfactory'. It is assumed that 90% of all deliveries of Speedy Delivery Services achieve an 'at least satisfactory' rating. ----- Test at the 10% level of significance whether Steve is achieving an 'at least satisfactory' rating on more than 90% of his deliveries.

Speedy Delivery Services claim to have a 90% at least satisfactory' rating. They hire a new delivery driver called Steve. After his first 1000 deliveries, a random sample of 25 of his deliveries is selected. Of these 25 deliveries, 24 are rated as 'at least satisfactory'. It is assumed that 90% of all deliveries of Speedy Delivery Services achieve an 'at least satisfactory' rating. ----- Test at the 10% level of significance whether Steve is achieving an 'at least satisfactory' rating on more than 90% of his deliveries.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Speedy Delivery Services claim to have a 90% at least satisfactory' rating. They hire a new delivery driver called Steve. After his first 1000 deliveries, a random sample of 25 of his deliveries is selected. Of these 25 deliveries, 24 are rated as 'at least satisfactory'. It is assumed that 90% of all deliveries of Speedy Delivery Services achieve an 'at least satisfactory' rating. ----- Test at the 10% level of significance whether Steve is achieving an 'at least satisfactory' rating on more than 90% of his deliveries.
Transcribed Image Text:Speedy Delivery Services claim to have a 90% at least satisfactory' rating. They hire a new delivery driver called Steve. After his first 1000 deliveries, a random sample of 25 of his deliveries is selected. Of these 25 deliveries, 24 are rated as 'at least satisfactory'. It is assumed that 90% of all deliveries of Speedy Delivery Services achieve an 'at least satisfactory' rating. ----- Test at the 10% level of significance whether Steve is achieving an 'at least satisfactory' rating on more than 90% of his deliveries.
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