Evrey
2 answers:
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Answer:
a) Therefore, the probability is P=1/52.
b) Therefore, the probability is P=9/400.
Step-by-step explanation:
We know that a batch of 40 parts contains six defects.
a) We calculate the probability that the both parts are defective, if two parts are drawn randomly one at a time without replacement.
The probability for the first is 6/40.
The probability for the second is 5/39.
We get:
Therefore, the probability is P=1/52.
b) We calculate the probability that the both parts are defective, if two parts are drawn randomly one at a time with replacement.
The probability for the first is 6/40.
The probability for the second is 6/40.
We get:
Therefore, the probability is P=9/400.
Solution: The sample mean of sample 1 is:
The sample mean of sample 2 is:
The sample mean of sample 3 is:
The sample mean of sample 4 is:
The minimum sample mean of the four sample means is 3.6 and maximum sample mean of the four sample means is 4.4.
Therefore, using his four samples, between 3.6 and 4.4 will Ardem's actual population mean lie.
Hence the option 3.6 and 4.4 is correct