Quarter 4_Week 1_Quiz 1_S&P

What is point estimation?

• Point estimation is a measure that describes a population.

• Point estimation is a measure that describes a sample.

• Point estimation is the process of finding a single value from a random sample.

• Point estimation means estimating points from the given population.

What is needed to obtain a point estimate?

• pointer

•  statistic

• parameter

• point estimator

Given a population consisting of values (6,3,8,9,4). What is the population mean?

• 5

• 5.5

• 6

• 6.5

In a z-statistic,

• n=30

• n<30

• 0.05

• 0.025

• 0.475

• 1.96

• 0.05

• 0.025

• 0.475

• 1.96

The mean score of the random sample of 49 Grade 11 students who took the first periodic test is calculated to be 78. The population variance is known to be 0.16. The confidence level is equal to 95.

What is the confidence interval for the mean of the entire Grade 11 students?

The mean score of the random sample of 49 Grade 11 students who took the first periodic test is calculated to be 78. The population variance is known to be 0.16. The confidence level is equal to 95.

What can you conclude about the confidence interval of the population mean?

• The researcher is 95% confident that the  is between 77.98 and 78.11           

• The researcher is 95% confident that the  is between 79.78 and 71.18           

• The researcher is 95% confident that the  is between 77.89 and 78.11  

• The researcher is 95% confident that the  is between 77.89 and 78.10                    

The mean score of the random sample of 49 Grade 11 students who took the first periodic test is calculated to be 78. The population variance is known to be 0.16. The confidence level is equal to 95.

What is the margin of error?

• 0.025

• 0.4750

• 0.112

• 77.89

What is the minimum sample size required to estimate the unknown population mean given a confidence interval of 95%, margin of error of 75 and a standard deviation of 250?

• 42.68

• 43

• 42.7

• 43.01