A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

答案: central limit theorem

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A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability that the sample proportion will be greater than 0.83 is

答案: 0.0668

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网课题库

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

答案: central limit theorem

A sample of 400 observations will be taken from an infinite population. The population proportion equals 0.8. The probability that the sample proportion will be greater than 0.83 is

答案: 0.0668

Which of the following is(are) NOT point estimator(s)?

答案: s;
m;
a

Which of the following is an example of probability sampling?

答案: simple random sampling;
stratified simple random sampling;
systematic sampling;
cluster sampling

Which of the following is an example of non probability sampling?

答案: convenience sampling;
judgment sampling

The error that occurs because a sample， and not the entire population， is used to estimate a population parameter is a sampling error.

答案: 正确

Cluster sampling is a non probability sampling method.

答案: 错误

A method of selecting a sample by randomly selecting the first element and then selecting every Kth element thereafter is stratified simple random sampling

答案: 错误

In a sample survey， it is common practice to use a t value of (when approximating a 95% confidence interval)

答案: 错误

A sampling unit must have one element.

答案: 错误

Conclusions drawn from a sample survey apply to any population.

答案: 错误

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the 答案: central limit theorem

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

答案: central limit theorem