Before the furniture store began its ad campaign, it averaged 163 customers per day. The manager is investigating if the average is larger since the ad came out. The data for the 12 randomly selected...

Before the furniture store began its ad campaign, it averaged 163 customers per day. The manager is investigating if the average is larger since the ad came out. The data for the 12 randomly selected days since the ad campaign began is shown below:

177, 150, 195, 151, 161, 194, 186, 185, 178, 169, 150, 184

Assuming that the distribution is normal, what can be concluded at the αα = 0.10 level of significance?

1. The test statistic ? z t  = (please show your answer to 3 decimal places.)


2. The p-value = (Please show your answer to 4 decimal places.)


3. The p-value is ? ≤ >  α


4.