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.
Advertising fees are dealer added to the price of a new car and can be as high as $1,000, however, buying online generally eliminates Advertising fees.ealer installed options, which can include paint and fabric sealant and window tinting, are another cost to consider when buying a new car. Dealer Holdback Allowance is an invisible 2% to 3% fee sometimes added to the car price to allow the dealer to sell a new car below invoice price and still make a profit.