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.
1 The website Homewyse.com states that the national average cost to paint a garage floor runs between $1.61 and $2.42 per square foot. 2  The said site also gives some quotes based on the clientsâ location and garage floor size. With the said price list, you can simply calculate all the overall floor size of your garage and add up all the expenses. 2  The website Homewyse.com states that the national average cost to paint a garage floor runs between $1.61 and $2.42 per square foot.