Answer to Question #315780 in Statistics and Probability for Albert

Question

What I Can Do

Make use of your acquired skills in this lesson.

Instruction: Read and analyze the following situations, Determine whether the following statements have a known (or can be computed) or unknown population. variance. Write your answer on the space provided. Also, identify the formula to be used for the standard error of the mean by writing d, when the population variance is known and sy when the population variance is unknown.

Situation

Answer

Standard Error Formula

and

1. A population has a mean of 85 and a standard deviation of 6. A random sample of 22 measurements is drawn from population.

2. The weights of female SHS students are

normally distributed with a mean of 45kg Twenty samples consisting of 10 students are drawn from the population and found to have a mean of 46 kg and a standard

deviation of 1.24kg.

231

3. A random of n=70 measurements are obtained from a population with a mean of 156 and a standard deviation of 23

4. A manufacturer of nylon synthetic