Question

QUESTION 19 Provide an appropriate response. Find the Z-score corresponding to the given value and use the z-score to determine whether the value is unusual Consider a score to be unusual if it is at least three standard deviations above or below the mean Round to the 2-score to two decimal places, if necessary A department store, on average, has daily sales of $29,693.70. The standard deviation of sales is $1000 On Tuesday, the store sold $36,570-15 worth of goods 7.19. unusual 722, not unusual 6.88, unusual 5.50, not unusual QUESTION 20 Suppose the average price for new cars in 2012 has a mean of $30,100 and a standard deviation of $5,600 Based on this information, what interval of prices would we expect at least 89% of new car prices to fall within? 324.500 to $35 700 $7700 to $52,500 $18,000 to 41,300 $13,300 to $46,900

Answer 1

Answer of questionig Given that mean= N=29693.70 standard deviation =6=1000 - x= 36570.15 2 score = z= x^4 = 36570.15-29693.70 1000 2=6.88, unusual) Answer of question 2o Given that u = 30100 and 6=5600 i according to chebycher's Theorem: at least 8gy, of the data lies within three standard deviations of means ie. M + 36 1. Interval will be (30,100-3 (5000) 30100+ 3 (5800)) i $13,300, $46,900) Answer: $13,300 to $46, goo