Autonomous investment is indicated by the intercept. 1  An Induced Slope: The slope of the investment equation (f) measures the change in investment resulting from a change in income. If income changes by $1, then investment changes by $f.
24 to 48 Hours. You should wait at least 24 hours before grouting the tiles. You may notice that the edges of the thinset or the thinset showing through the grout lines looks dry. Don't be fooled by this. The thinset under the tiles isn't receiving as much air as the edges and is therefor not fully cured.
I am getting ready to put down about 250 sqft. of tile in a hallway. I am using 13x13 ceramic tiles. I have layed tile several times before but I am a DIYer. My question is about how long to wait when applying the grout before going over it and wiping up the extra. I have had off and on luck with this and would like to be more consistant. I waited to long one time or maybe just did to big of area before wiping and it was hard to get it off of the tile. Took lots of elbow grease. So any help in grouting is greatly appreciated. I am using a sanded grout with 1/4 in. spacers between the tiles.