Perform a statistical analysis / test of hypothesis on each of the following problems. The market researcher in a certain company conducted a study to assess the effectiveness of a new computerized...

Perform a statistical analysis / test of hypothesis on each of the following problems.

1. The market researcher in a certain company conducted a study to assess the effectiveness of a new computerized system of filling orders. He selected a random sample of 100 customers served using the old system and 100 served using the new system. He contacts each customer to find out whether or not the order was filled satisfactorily within 2 weeks. Results were recorded in the accompanying table:

System	Satisfied	Not Satisfied	Total
OLD	68	32	100
NEW	85	15	100
Total	153	47	200

Test at alpha equal to 5% the null hypothesis that the proportion of satisfied customers among those served by the new system is the same as that among those served by the old system.

Extracted text: Perform a statistical analysis / test of hypothesis on each of the following problems. 2. The market researcher in a certain company conducted a study to assess the effectiveness of a new computerized system of filling orders. He selected a random sample of 100 customers served using the old system and 100 served using the new system. He contacts each customer to find out whether or not the order was filled satisfactorily within 2 weeks. Results were recorded in the accompanying table: System Satisfied Not Satisfied Total OLD 68 32 100 NEW 85 15 100 Total 153 47 200 Test at alpha equal to 5% the null hypothesis that the proportion of satisfied customers among those served by the new system is the same as that among those served by the old system.


Extracted text: Perform a statistical analysis / test of hypothesis on each of the following problems. 2. The market researcher in a certain company conducted a study to assess the effectiveness of a new computerized system of filling orders. He selected a random sample of 100 customers served using the old system and 100 served using the new system. He contacts each customer to find out whether or not the order was filled satisfactorily within 2 weeks. Results were recorded in the accompanying table: System Satisfied Not Satisfied Total OLD 68 32 100 NEW 85 15 100 Total 153 47 200 Test at alpha equal to 5% the null hypothesis that the proportion of satisfied customers among those served by the new system is the same as that among those served by the old system.