# Question: The following data represent the age in weeks at which

The following data represent the age (in weeks) at which babies ﬁrst crawl based on a survey of 12 mothers conducted by Essential Baby. Construct and interpret a 95% conﬁdence interval for the mean age at which a baby ﬁrst crawls. Use the normal probability plot and boxplot to assist in verifying the model requirements.

## Answer to relevant Questions

The trade volume of a stock is the number of shares traded on a given day. The following data,in millions (so that 2.45 represents 2,450,000 shares traded), represent the volume of Harley-Davidson stock traded for a random ...A question on the 2006 General Social Survey was this: “About how many times did you engage in intercourse during the month?” The question was only asked of participants who had previously indicated that they had engaged ...The exponential probability distribution can be used to model waiting time in line or the lifetime of electronic components. Its density function is skewed right. Suppose the wait-time in a line can be modeled by the ...A simple random sample of size n = 785 adults was asked if they follow college football. Of the 785 surveyed, 275 responded that they did follow college football.Construct a 95% conﬁdence interval for the population ...In a survey of 1008 adult Americans the Gallup organization asked, “When you retire, do you think you will have enough money to live comfortably or not?” Of the 1008 surveyed, 526 stated that they were worried about ...Post your question