0
120 is one standard deviation greater than the mean (z = 1).
So you want Pr(z < 1)
The probability of a score at most 1 sd away from the mean is 0.68
That is Pr(-1 < z < 1) = 0.68
So Pr(|z| > 1) = 1 - 0.68 = 0.32
then by symmetry,
Pr(z > 1) = 1/2*0.32 = 0.16
So Pr(z < 1) = 1 - 0.16 = 0.84
120 is one standard deviation greater than the mean (z = 1).
So you want Pr(z < 1)
The probability of a score at most 1 sd away from the mean is 0.68
That is Pr(-1 < z < 1) = 0.68
So Pr(|z| > 1) = 1 - 0.68 = 0.32
then by symmetry,
Pr(z > 1) = 1/2*0.32 = 0.16
So Pr(z < 1) = 1 - 0.16 = 0.84
120 is one standard deviation greater than the mean (z = 1).
So you want Pr(z < 1)
The probability of a score at most 1 sd away from the mean is 0.68
That is Pr(-1 < z < 1) = 0.68
So Pr(|z| > 1) = 1 - 0.68 = 0.32
then by symmetry,
Pr(z > 1) = 1/2*0.32 = 0.16
So Pr(z < 1) = 1 - 0.16 = 0.84
120 is one standard deviation greater than the mean (z = 1).
So you want Pr(z < 1)
The probability of a score at most 1 sd away from the mean is 0.68
That is Pr(-1 < z < 1) = 0.68
So Pr(|z| > 1) = 1 - 0.68 = 0.32
then by symmetry,
Pr(z > 1) = 1/2*0.32 = 0.16
So Pr(z < 1) = 1 - 0.16 = 0.84
What else can I help you with?
Is the relative frequency of surveyed girls that have sports as their activity a joint relative frequency or a marginal relative frequency?
Yes
What is the difference between absolute deviation and relative deviation?
absolute deviation is a difference between say two numbers. The result has the same units as the two numbers have. Relative deviation is a ratio and so it is a pure number without any units.
What is the Difference in relative frequency and percentage frequency?
Relative frequency is a method of calculating the frequency of an event. Percentage frequency is a way of presenting the frequency of an event.
What is the meaning of a relative frequency of 0?
Relative frequency of an event is the frequency of that event divided by the total number of observations. Therefore, a relative frequency of 0 implies the event has zero proportion (or probability).
The first class in a relative frequency table is 50-59 and the corresponding relative frequency is 0.2What does the 0.2 value indicate?
The sum of the relative frequencies must equal 1 (or 100%), because each individual relative frequency is a fraction of the total frequency. The relative frequency of any category is the proportion or percentage of the data values that fall in that category. Relative frequency = relative in category/ total frequency It means a number in that class appeared 20% of the total appearances of all classes
Why is it that only one normal distribution table is needed to find any probability under the normal curve?
Anything that is normally distributed has certain properties. One is that the bulk of scores will be near the mean and the farther from the mean you are, the less common the score. Specifically, about 68% of anything that is normally distributed falls within one standard deviation of the mean. That means that 68% of IQ scores fall between 85 and 115 (the mean being 100 and standard deviation being 15) AND 68% of adult male heights fall between 65 and 75 inches (the mean being 70 and I am estimating a standard deviation of 5). Basically, even though the means and standard deviations change, something that is normally distributed will keep these probabilities (relative to the mean and standard deviation). By standardizing these numbers (changing the mean to 0 and the standard deviation to 1) we can use one table to find the probabilities for anything that is normally distributed.
Are relative deviation and absolute deviation the same?
I am pretty sure they are not.
Is the relative frequency of surveyed girls that have sports as their activity a joint relative frequency or a marginal relative frequency?
Yes
What is the difference between absolute deviation and relative deviation?
absolute deviation is a difference between say two numbers. The result has the same units as the two numbers have. Relative deviation is a ratio and so it is a pure number without any units.
Is relative standard deviation an absolute value?
No, as its name suggests, it is a relative measure.
What is the Difference in relative frequency and percentage frequency?
Relative frequency is a method of calculating the frequency of an event. Percentage frequency is a way of presenting the frequency of an event.
What is the significance of the delta f over f parameter in frequency modulation?
The delta f over f parameter in frequency modulation is significant because it represents the frequency deviation relative to the carrier frequency. It determines the amount by which the frequency of the modulated signal varies from the original carrier frequency. This parameter is crucial in determining the bandwidth and quality of the modulated signal in frequency modulation systems.
Why standard deviation is the best measurement for dispersion?
Standard deviation is often considered the best measurement for dispersion because it quantifies the amount of variation or spread in a dataset relative to the mean. Unlike range or interquartile range, standard deviation takes into account all data points, allowing for a more comprehensive understanding of variability. It also has a direct mathematical relationship with other statistical measures, making it useful for further analysis, particularly in normally distributed data. Additionally, it is expressed in the same units as the data, facilitating easier interpretation.
What is the use of coefficient of deviation?
the relative measures of the mean deviation to the average about which it is calculated,i.e. arithmetic mean.
What is the meaning of a relative frequency of 0?
Relative frequency of an event is the frequency of that event divided by the total number of observations. Therefore, a relative frequency of 0 implies the event has zero proportion (or probability).
The first class in a relative frequency table is 50-59 and the corresponding relative frequency is 0.2What does the 0.2 value indicate?
The sum of the relative frequencies must equal 1 (or 100%), because each individual relative frequency is a fraction of the total frequency. The relative frequency of any category is the proportion or percentage of the data values that fall in that category. Relative frequency = relative in category/ total frequency It means a number in that class appeared 20% of the total appearances of all classes
What is the name for a relative frequency distribution shown by heights?
Are you talking about a histogram of the relative frequency distribution.
