A simple random sample of fish is taken from a population that has a mean length

Question

A simple random sample of fish is taken from a population that has a mean length of 80 cm and a standard deviation of 20 cm. how large of a sample is needed so that the sampling distribution of X has a standard deviation of 1 cm? A simple random sample of fish is taken from a population that has a mean length of 80 cm and a standard deviation of 20 cm. how large of a sample is needed so that the sampling distribution of X has a standard deviation of 1 cm? A simple random sample of fish is taken from a population that has a mean length of 80 cm and a standard deviation of 20 cm. how large of a sample is needed so that the sampling distribution of X has a standard deviation of 1 cm?

Explanation / Answer

As

standard error = s / sqrt(n)

Thus,

1 = 20 / sqrt(n)

sqrt(n) = 20

n = 400 [ANSWER]

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.