The mistake is in step 4. It's correct up to step 3. Step 3 shows: $293.25 * 1/6 (this is correct) Now you must multiply $293.25 by the fraction 1/6, which is the same as dividing $293.25 by 6. Instead, in step 4, $293.25 was multiplied by 6. Step 4 is the mistake.
It’s 15d^2 -10d is that not an answer choice?
Answer:
7.1 weeks to 68.4 weeks
Step-by-step explanation:
Chebyshev's Theorem states that:
75% of the measures are within 2 standard deviations of the mean.
89% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 38.1
Standard deviation = 10.1
Between what two search times does Chebyshev's Theorem guarantee that we will find at least 89% of the graduates
Between 3 standard deviations of the mean.
So from 38.1 - 3*10.1 = 7.8 weeks to 38.1 + 3*10.1 = 68.4 weeks
