A survey of one class at Pioneer Middle School found that 20 out of 30 students would spend $12 for a school t-shirt Suppose the
2 answers:
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Answer:
The diameter of an extra large pizza from Gambino's Pizzeria is
Step-by-step explanation:
we know that
The area of a circle (circular pizza ) is equal to
we have
substitute in the formula and solve for the radius r
Simplify
Find the diameter
Remember that the diameter is two times the radius
Answer:
The value that is greater than 45% of the data values is approximately 137.84.
Step-by-step explanation:
The key is transforming values from this distribution to a z-score range and finding the corresponding value using a z-score table.
We are looking for a value x which attains a critical z-score that corresponds to the (100-45)%=55-th percentile:
The critical z value (from z-score table, online) is: -0.12, so:
The value that is greater than 45% of the data values is approximately 137.84.