Stat and probab

It is a measure of position that divides the data into four equal parts.

• Mean

• Median

• Quartile

• Decile

It measures the number of individual samples measured or observations used in a survey or experiment

• Population

• Sample size

• Standard deviation

• Variance

What process is involved in making conclusions about population values?

• Inferential statistics

• Hypothesis testing

• Descriptive statistics

• estimating parameters

What do you call a number that describes the characteristics of a population?

• Decimal

• Sample Statistics

• Parameter

• Interval

Which of the following statement is a characteristics of the t distribution?

• It is a continuous distribution.

• It has a mean of 0

• It is symmetrical

• All of the above

Which of the following illustrates confidence level?

• 5.0

• 99%

• 90-95

• .05

We wish to develop a confidence interval for the population mean. The population follows the normal distribution, the standard deviation of the population is 3, and we have a sample of 100 observations. What is the appropriate value of" z", if we use 90% confidence level?

• z= 1.64

• z=1.96

• t=1.833

• t=2.262

Which of the following refers to the fraction of sample possessing a certain trait?

• population

• mean

• confidence interval

• proportion

Which of these is a correct alternative hypothesis for two tailed test?

• H_o: μ = 9

• H_a: μ = 9

• H_o: μ ≠ 9

• H_a: μ ≠9

1-β, is the probability of which kind of error?

• Type I

• Type II

• Type A

• Type B