Question

7. Which of the following is BEST graphical method for describing categorical data? A. Bar chart B. Histogram C.Box-plot D. Pareto chart 8. Which of the following is NOT property of the variance? A. It measures the amount of spread or variability of observation from mean B. Standard deviation is square root of variance C. Normally used for describing measure of dispersion during reporting research data D. It is the average of the square of the deviations about the sample mean 9. Which of the following graphical method is BEST to used for detecting outliers or extreme values? A. Drop box Box plot C. Pareto apo D. Bar chart 10. Which of the following is NOT a property of Standard Error (SE)? A. Is the square root of the variance of the sampling distribution B. Can only be estimated if we take repeated samples from the population C. Will increase in value as the sample size increases D. Will decrease in value as the sample size decreases 11. Which of the following is NOT a property of standard normal distribution? A. It mean is zero (0) B. 68% of area under the standard normal density is between 1 and -1 standard deviation C. It can be written matbematically as N(0,1) D. 95% of area under the standard normal density is between +1 and -1 standard deviation 12. Which of the following statement is FALSEfor describing a population? A. Parameter is a value that associated with a population B. Statistics is a value that associated with a population C. Sample mean is one of the good estimator for the population mean D. A sample can be obtained from a population by some sampling method 13. Which of the following is NOT used for checking normality of data? A. Histogram Belevene test C. Shapiro Wilk test D. Kalmogorov Smirnov test

please answer correctly and answer all questions.. this is revision question...

Answer 1

question 7- B

Histogram because A histogram is an accurate reliable presentation of the distribution of numerical data. It is an estimate of the probability distribution of a continuous variable.

question 8 C

use variance to see how individual numbers relate to each other within a data set, rather than using broader mathematical techniques such as arranging numbers into quartiles. One drawback to variance is that it gives added weight to outliers, the numbers that are far from the mean.

QUESTION 9 D

bar chart is use to detacting outline and examining data.

A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally.

question 10 A

because square root of variance of sample distribution is known as Standard Deviation.

other option are correct about this

question 11 D

95 percent of area under the standard normal density is between +2 and -2 standard devation.

question 12 D

A statistic is a characteristic of a sample. If you collect a sample and calculate the mean and standard deviation, these are sample statistics. Inferential statistics allow you to use sample statistics to make conclusions about a population. BUT

A parameter is a value that describes a characteristic of an entire population, such as the population mean. Because you can almost never measure an entire population, you usually don’t know the real value of a parameter.

QUESTION 12 B

Levene's test

In statistics, Levene's test is an inferential statistic used to assess the equality of variances for a variable calculated for two or more groups.