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Answer:
He did not work for 6 days
Step-by-step explanation:
Sam is hired for a 20-day period.
Let x be the no. of days he did not work
So, No. of days he worked = 20-x
he earns per working day = $60
So, he earns for (20-x) days = 60(20-x)
For each day that he does not work, $30 is subtracted from his earnings.
So, Amount deducted for x days = 30x
So, His earning for 20 days =
We are given that At the end of the 20-day period, he received $660
So,
So, he did not work for 6 days
So, Option C is true
Answer:
Step-by-step explanation:
Let X be the SRS scores of students.
Given that X is normal with standard deviation about 6.5.
Mean difference = is desired
i.e. Z score should be
Std error = std deviation of sample = 0.447
b)
So std error must be 0.997 and sample size must be atleast 193 to get the difference of x bar and mu to lie within 1.3 points in either direction