Adam thinks the five people who sit next to him in class spend the same amount of money on their haircut on average. To find out he keeps track of how much their haircuts cost for the next couple of months. Assuming the cost of a haircut is random, normal, and the variances are the same, test if the average cost is equal (the tip is included in the price). Name Number of haircuts Average Cost Standard deviation for one haircut
Mallory 7 16.7 6.5
Matt 20 15.2 8
Stacey 18 16.1 5
Whitney 15 20.8 5.3
James 23 20.2 6

Use three decimal places in the table

DF SS MS F
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Error
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Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

An annual marathon covers a route that has a distance of approximately 26 miles. winning times for this marathon are all over 2 hours. the following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each. earlier period 14 12 15 22 13 10 19 13 9 14 20 18 16 20 23 12 18 17 6 13 recent period 7 11 7 14 8 9 11 14 8 7 9 8 7 9 9 9 9 8 10 8 (a) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks. for more details, view how to split a stem.) minutes beyond 2 hours earlier period 0 1 2 (b) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks.) minutes beyond 2 hours recent period (c) compare the two distributions. how many times under 15 minutes are in each distribution

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?