Stat and Proba

A school has 800 senior high school students. The average height of these students is 65 in. with a standard deviation of 5 in. Suppose you draw a sample of 45 students. What is the mean of the sampling distribution.

A population consists of the numbers 2,3,4,5 and 8. The number of possible samples of size 3 is 12.

Standard error is always non-negative.

Standard error is influenced by sample variance.

Which sample size will give a higher standard error of the mean? A. 12 b. 20 c. 25 D. 35

Random samples of 10 are drawn from a population with μ = 90 and σ = 15. The population mean is 10.

The t-distribution is symmetric and bell-shaped, like the normal distribution.

The t-table is used when the sample size is small (n > 30) and the population standard deviation σ is known.

The sample size of 45 will give a smaller standard error of the mean than a sample size of 35.

When the population is large and the sample size is small, the correction factor is not used.

All confidence levels have the same confidence coefficient.

Which of the following sample size will use the t-distribution? a. 100 b.75 c. 50 d. 25

The mean of the sampling distribution of the means is less than the population mean.

Assuming the standard deviation remains constant. Which of the following sample sizes would result in the largest value of standard error? A) 100 B) 16 C) 25 D) 49

Which of the following statements is correct? A. The mean of the sampling distribution of the means is less than the population mean. B. The mean of the sampling distribution of the means is equal to the population mean. C. The mean of the

When the confidence level is 99%, ά = 0.1

Sampling error and sampling size are directly related.

A finite population is one that consists of fixed number of elements.

Which standard deviation is a poor estimate of the mean? A. 0.77 B. 0.87 C. 0.97 D. 0.67

A standard deviation of 1.45 is a good estimate of the mean than a standard deviation of 0.75.