probability is about .95 that the 95% confidence interval will include the true population parameter. On the other hand, 2.5% of the time the highest value in the confidence interval will be smaller than the true value, while 2.5% of the time the smallest value in the confidence interval will be greater than the true value.
Set prices with room to move. Most people expect prices at garage sales to be just the starting price and are about 25% to 50% above the seller's (ie your) bottom-line price to allow for negotiating. The amount depends on the condition of the item and how much you are prepared to haggle.
Compiled by the Fairfax County Department of Management and Budget. Average Home Sales Prices The average sales price of all homes that sold in June 2014 in Fairfax County was $570,434, an increase of 2.9 percent over the June 2013 average sales price of $554,117.Compared to the annual 2013 average home sales price of $531,136, the June price increased 7.4 percent.The average sales price for detached homes that sold in June 2014 was $729,298, an increase of 4.7 percent over the June 2013 average of $696,629.ompared to the annual 2013 average home sales price of $531,136, the June price increased 7.4 percent. The average sales price for detached homes that sold in June 2014 was $729,298, an increase of 4.7 percent over the June 2013 average of $696,629.