2: Determine the sample proportion of successes ( ) for each of the following problems. 2. In the previous year the proportion of deposits in checking accounts at a certain bank that were made...

Extracted text: 2: Determine the sample proportion of successes ( ) for each of the following problems. 2. In the previous year the proportion of deposits in checking accounts at a certain bank that were made electronically was 45%. The bank wishes to determine if the proportion is higher this year. It examined 20,000 deposit records and found that 9,217 were electronic. Determine, at the 1% level of significance, whether the data provide sufficient evidence to conclude that more than 45% of all deposits to checking accounts are now being made electronically.