Mathematics, 14.04.2020 17:24 alyxkellar06
A bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes the new system will reduce the waiting time that currently is 10 minutes. (a) Formulate the null and alternative hypotheses for this problem. (b) A random sample of 70 waiting times was obtained after the system was implemented. The sample showed a sample mean of 9.5 minutes and a standard deviation of 2.2 minutes. At what level of significance can you conclude that wait times have decreased?
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A bank manager has developed a new system to reduce the time customers spend waiting for teller serv...
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