mean deviation

Which among the following statement(s) is/are correct? I. An outlier is an extremely high or an extremely low data value when compared with the rest of the data values. II. The mean and standard deviation of a variable are not affected by an outlier. III. The interquartile range..

In this series too deviations may be taken either from the actual mean or from standard mean. The calculations will be simplified if the deviation are taken from assumed mean..

Select the true statement(s). I. The measure of central tendency used in exploratory data analysis is mean. II. The measure of central tendency used in z score is median. III. The mean and standard deviation is better than five-number summary for describing a skewed di..

Standard Deviation for continuous series - In this series too deviations may be taken either from the actual mean or from standard mean. The calculations will be simplified if the deviation are taken from assumed mean..

It has been observed that the number of telephone calls made daily in a city between 11a.m and 12 p.m have a mean of 252 and a standard deviation of 25. What is the probability that there will be more than 327 or less than 177 calls in this city between 11a.m and 12 p.m? => 0.99..

The mean number of rooms of 100 hotels of town A and 150 hotels of town B are 60 and 50 with standard deviations 4 and 4.47. Find out the P-value and verify if the means differ at 98% confidence level? => 0.4999, the means differ significantly or 0.0002 the h..

The mean weight of girls in grade 12 of school X is 125 pounds, and the standard deviation is 20 pounds. If a sample of 25 girls is selected, then what is the probability that the mean of the sample will be greater than 128 pounds? Assume the variable is normally distr..

A random sample of 52 days taken at a chemical laboratory shows that an average of 36 specimens were tested per day. The standard deviation of the population is 6. I. Find the 99% confidence interval of the mean number of specimens tested each day at the laboratory. II. Find the..

The lifetime of certain kinds of electronic devices have a mean of 350 hours and a standard deviation of 20 hours. The distribution is measured to the nearest hour and can be approximated closely to a normal curve. What percentage of electronic devices will have life time of 315..

The average income of 50 taxi drivers was found as $26,358. Find the test value for a population mean of $25,767 and standard deviation of $1105. Does the sample come from this population? α = 0.01. => 3.782, no or 26.742, no or 1.635, yes or 1.891, yes..