Statistics and Probability 4th Quarter Assessment Reviewer

Which of the following DOES NOT belong to the group?

• $\mu$

• $\overline{x}$

• $s$

• $s^2$

Which is the basis for estimating a parameter value?

• sample statistics

• sample parameter

• population statistics

• population parameter

It is an estimate of a parameter which uses a specific numerical value.

• interval estimate

• exact estimate

• point estimate

• mean estimate

Which of the following illustrates interval estimate?

• more than 12 hours

• exactly 12.8 hours

• about 8 to 12 hours

• less than 8 hours

In a survey conducted by a researcher in economics, 5 groups of residents of Masagana City were asked about their expenses in a day. The mean expenses in pesos for each group are as follows: 588, 632, 575, 740, and 610.

What is the point estimate of the population mean?

• P786.25

• P629

• P524.16

• P449.28

In a survey conducted by a researcher in economics, 5 groups of residents of Masagana City were asked about their expenses in a day. The mean expenses in pesos for each group are as follows: 588, 632, 575, 740, and 610.

What is the point estimate of the population standard deviation?

• P3,457.60

• P4,322.00

• P58.80

• P65.74

It is the probability that the interval estimate contains the parameter.

• confidence level

• confidence coefficient

• confidence interval

• confidence mean

What are the critical values for a 90% confidence level?

• ±1.32

• ±1.65

• ±1.96

• ±2.58

What will happen to the confidence coefficient if the confidence level decreases?

• increase

• decrease

• nothing

• cannot be determined

What is the confidence level if the confidence coefficient is ?

• 90%

• 95%

• 98%

• 99%