Mikel gave a \$1.32$1.32dollar sign, 1, point, 32 tip for an order that cost \$8.80$8.80dollar sign, 8, point, 80. Determine whe
2 answers:
Answer:
1. Proportional to Mikel's tip.
2. Not proportional to Mikel's tip.
3. Proportional to Mikel's tip.
Step-by-step explanation:
We are told that Mikel gave a $1.32 tip for an order that cost $8.80. We are asked to determine whether or not each given tip is proportional to Mikel's tip.
Let us compare our given tip and order cost proportions with Mikel given tip and order cost proportion.
1.
We can see that our given proportion is equal to Mikel's proportion, therefore, tip given in first option is proportional to Mikel's tip.
2.
We can see that tip given in second option is greater than Mikel's tip, therefore, it is not proportional to Mikel's tip.
3.
We can see that our both proportions are equal, therefore, tip given in third option is proportional to Mikel's tip.
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Answer:
January had a higher z-score for sales on the 15th, and the value of that z-score was of 0.5.
Step-by-step explanation:
z-score:
In a set with mean and standard deviation
, the z-score of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
January:
The mean daily sales for January was $300 with a standard deviation of $20. On the 15th of January, the shop sold $310 of yogurt. This means, respectively, that . So
February:
The mean daily sales for February was $320 with a standard deviation of $50. On the 15th of February, the shop sold $340 of yogurt. This means, respectively, that . So
January had a higher z-score for sales on the 15th, and the value of that z-score was of 0.5.