Do women wait longer than men to receive their orders at coffee shops? This question was studied by an economics major at Middlebury College [Myers, C.K. (2007). Ladies first: A field study of discrimination in coffee shops.] For a sample of customers, data were measured on the following variables: - Wait Time (in seconds) - Gender \( (0= \) male, \( 1= \) female, 2 = other \( ) \) - Age Group \( (0= \) less than \( 25,1=26 \) to \( 40,2= \) over 40\( ) \) - Type of Order (1 = in-person, 2 = online \( ) \)
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- Wait time is measured in seconds, which is a quantitative measurement. It has a true zero point (no wait time), and differences between values are meaningful. Therefore, wait time is measured on a **ratio** scale. Show more…
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The accompanying data are a subset of data that appeared in the paper "Ladies First? A Field Study of Discrimination in Coffee Shops" (Applied Economics [April, 2008]). The data are the times (in seconds) between ordering and receiving coffee for 19 male customers at a Boston coffee shop. $\begin{array}{llllllllll}40 & 60 & 70 & 80 & 85 & 90 & 100 & 100 & 110 & 120\end{array}$ $$ \begin{array}{lllllllll} 125 & 125 & 140 & 140 & 160 & 160 & 170 & 180 & 200 \end{array} $$
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The time it takes a barista at Starbucks to take your order follows a normal distribution with µ = 68 seconds and σ = 15 seconds. a) What is the time at the 25th percentile? b) What is the time at the 75th percentile? c) What is the time at the 90th percentile? d) Find the percentage of people who waited longer than 80 seconds. e) Find the percentage of people who waited less than 66 seconds. f) Between what lengths in seconds will the middle 50% of people take? g) What lengths in seconds mark the times the most extreme 10% (note: I didn't say fastest) of baristas take?
David N.
Someone studied the waiting time at two different coffee shops. They had the same mean waiting time (4.8 minutes), but the standard deviation was 1.3 minutes at Café A and 2.5 minutes at Café B. Which one would you prefer to go to? Why? In 1997, a study was conducted to see what private high school in America had graduates with the highest income. A school called Lakeside High School in Seattle won first place, with the average graduate earning more than $2.5 million. How could this happen?
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