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10. [l'1 Points] DETAILS WANEFMAC? 9.3.031.M|. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The following gures show the price of gold per ounce, in dollars, for a 10-business-day period. 1,068, 1,064, 1,073, 1,063, 1,064, 1,060, 1,054, 1,06?, 1,041, 1,054 Find the sample mean, median, and modets}. (Enter multiple modes as a comma-separated list, if necessary.) median :l mode(s) ' What do your answers tell you about the price of silver? (Enter multiple answers as a comma-separated list, if necessary.) Over the 10-business-day period sampled, the price of gold averaged $ :J per ounce. It was above $ :J as many times as it was below that price, and stood at $ ' per ounce more often than at any other price. Need Help? _ 11. [0.4911 Points] DETAILS PREVIOUS ANSWERS WANEFMAC7 9.3.033. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A survey of 52 U5. supermarkets yielded the following relative frequency table, where X is the number of checkout lanes at a randome chosen supermarket. 2 ' 3 l 4 l 5 l 6 l T l 8 l 9 ' 10 l 0.06 ' 0.06 l 0.06 l 0.10 l 0.15 l 0.25 l 0.20 l 0.06 ' 0.05 l (a) Compute ,u = E(X). HINT [See Example 3.] 5004:] Interpret the result. 0 There were at least this many checkout lanes in each supermarket that was surveyed. O This was the most frequently observed number of checkout lanes in surveyed supermarkets. 0 There were at most this many checkout lanes in each supermarket that was surveyed. 0 There were, on average, this many checkout lanes in a supermarket that was surveyed. (b) Find P(X 4: ,6) or P(X s y). ......-[:] Ptx>m=l:l Interpret the result. Then P{x > p} is greater than c ( P0: 4 ,0). Thus, most supermarkets have more than 0 the average number of checkout lanes. 3. [I1 Points] DETAILS WANEFMAC7 9.3.012. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Calculate the expected value of X, E(X}, for the given probability distribution. 4. [11 Points] DETAILS WANEFMAC? 9.3.016. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Calculate the expected value of X, E00, for the given probability distribution