Sally and Sara sell flower pots at their garage sale. Martha motivates Rose mentioning that they will sell a minimum of 16 pots per day if the outside temperature exceeds 60o F. From a sample, whose population is assumed to follow a Normal Distribution, taken for 30 days at 60 degrees or more an average of 15.2 pots per day were sold with a Standard Deviation of 0.6 pots. What is the Z value for this sales process?
The Z value for this sales process can be calculated using the formula: (Observed Value - Hypothesized Value) / Standard Deviation. The observed value (sample mean) is 15.2 pots per day, the hypothesized value (population mean) is 16 pots per day, and the standard deviation is 0.6 pots per day. Thus, the Z value is (15.2 - 16) / 0.6, which equals -0.8 / 0.6 = -1.33. Therefore, the correct answer is 1.33 (considering the absolute value).
C is correct. Z = Observed Value or Sample Mean subtracted with Hypothesized Value or Population Mean / divided by standard deviation. 15.2 (observed) - 16 (hypothesized) / 0.6 (standard deviation) = -1.33