The histogram below shows the amount of time visitors to a museum spent browsing an exhibit on a Saturday. There were 300 visitors that day. The following histogram is of the data collected. a) How many visitors spent less than 25 minutes at the museum that day? b) What percent of visitors spent between 35 to 55minutes at the museum that day? c) Give two sentences to describe the overall shape of the distribution and in terms of the amount of time spent by the visitors. d) If 1% of visitors have spent more than 145 minutes in the museum, how many visitors would that be?
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.
The histogram below shows the amount of time visitors to a museum spent browsing an exhibit on a Saturday. There were
300 visitors that day.
The following histogram is of the data collected.
a) How many visitors spent less than 25 minutes at the museum that day?
b) What percent of visitors spent between 35 to 55minutes at the museum that day?
c) Give two sentences to describe the overall shape of the distribution and in terms of the amount of time spent by the visitors.
d) If 1% of visitors have spent more than 145 minutes in the museum, how many visitors would that be?
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