3 Standard Scores and Z-Scores Calculate a z-score using a given value and the corresponding mean and standard deviation. The sales data from the past two months of a frozen yogurt shop are approximately normal. The mean daily sales for the first month was $200 with a standard deviation of $30. On the 15th of the first month, the shop sold $245 of yogurt. The mean daily sales for the second month was $220 with a standard deviation of $50. On the 15th of the second month, the shop sold $270 of yogurt. Which month had a higher z-score for sales on the 15th, and what is the value of that z-score? a.) The first month, with a score of 0.9. b.) The second month, with a z-score of 1. c.) The first month, with a z-score of 1.5. d.) The second month, with a score of 1.67. SUBMIT MY ANSWER Report an issue with this question Katherine Williams Katherine Williams Ryan Backman Ryan Backman Jonathan Osters Jonathan Osters Sophia Sophia Standard Scores and Z-Scores Sophia Sophia Make my favorite instructor PDF Version WHAT'S COVERED This tutorial will cover the topic of z-scores. Our discussion breaks down as follows