In each of the following variables, decide which type of data grouping (single-value, limit, or cutpoint) is probably the best. 4 a. Number of Bedrooms. The number of bedrooms per single family dwelling b. Ages of Householders. The ages of householders, given as a whole number c. Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100 patients by using a particular brand of sleeping pill. d. Number of Smartphones. The number of smartphones per person. e. Gas Mileage. The gas mileages, rounded to the nearest number of miles per gallon, of all new car models. f. Grammostola. The weight, in grams, of a sample of 50 Grammostola, a variety of tarantulas
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
In each of the following variables, decide which type of data grouping (single-value, limit, or cutpoint) is
probably the best.
4
a. Number of Bedrooms. The number of bedrooms per single family dwelling
b. Ages of Householders. The ages of householders, given as a whole number
c. Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100 patients
by using a particular brand of sleeping pill.
d. Number of Smartphones. The number of smartphones per person.
e. Gas Mileage. The gas mileages, rounded to the nearest number of miles per gallon, of all new car
models.
f. Grammostola. The weight, in grams, of a sample of 50 Grammostola, a variety of tarantulas
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