Knowing how quickly players accumulate resources can impact decisions about in-game micro transactions. You are part of a design team that needs to calculate the amount of gold coins obtained by player activities by a certain level in your game. From previous studies, you know the standard deviation is 7730.9 gold coins. Your boss wants you to survey players to find the average number of gold coins players can earn by that particular level. Your boss wants to use a 90% confidence level and he wants to be certain within 500 gold coins. How many players should you survey? You will need to survey players.

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec