P-value - ReSAKSS Asia
... By convention, p-values of <.05 are often accepted as “statistically significant” in the medical literature; but this is an arbitrary cut-off. A cut-off of p<.05 means that in about 5 of 100 experiments, a result would appear significant just by chance (“Type I error”). ...
... By convention, p-values of <.05 are often accepted as “statistically significant” in the medical literature; but this is an arbitrary cut-off. A cut-off of p<.05 means that in about 5 of 100 experiments, a result would appear significant just by chance (“Type I error”). ...
Finding the t-value having area 0.05 to it`s right
... • Dr. Z hypothesizes that business executives spend more time on their cell phone each year than does the average cell phone user. She interviews a sample of 20 business executives, and finds that they use on average 3500 minutes of cellular air time each year, with a standard deviation 300 minutes. ...
... • Dr. Z hypothesizes that business executives spend more time on their cell phone each year than does the average cell phone user. She interviews a sample of 20 business executives, and finds that they use on average 3500 minutes of cellular air time each year, with a standard deviation 300 minutes. ...
infer
... shape of a histogram drawn from a small sample of observations does not always accurately represent the shape of the population. For this reason, we need additional methods for assessing the normality of a random variable when we are looking at sample data. ...
... shape of a histogram drawn from a small sample of observations does not always accurately represent the shape of the population. For this reason, we need additional methods for assessing the normality of a random variable when we are looking at sample data. ...
Exam # 1
... How many data points will be lost in the forecast process relative to the original data series? A) B) C) D) E) ...
... How many data points will be lost in the forecast process relative to the original data series? A) B) C) D) E) ...
Chapter 4
... standard deviation of .55. What is the standard error of the mean for sample sizes of 30? a) .02 b) .10 c) .37 d) 3.64 -24. In order for the standard error of the mean to equal 1.5 when the sample size is 9, what must be the value of the standard deviation of the population? a) .5 b) 1.5 c) 4.5 d) 1 ...
... standard deviation of .55. What is the standard error of the mean for sample sizes of 30? a) .02 b) .10 c) .37 d) 3.64 -24. In order for the standard error of the mean to equal 1.5 when the sample size is 9, what must be the value of the standard deviation of the population? a) .5 b) 1.5 c) 4.5 d) 1 ...
Sep.10
... Range is not resistant and it ignores the numerical values of nearly all the data. • deviation from the mean: the difference between the observation and the sample mean d = x − x̄ • variance: the average of the squared deviations P sum of squared deviations (x − x̄)2 ...
... Range is not resistant and it ignores the numerical values of nearly all the data. • deviation from the mean: the difference between the observation and the sample mean d = x − x̄ • variance: the average of the squared deviations P sum of squared deviations (x − x̄)2 ...