ng Tut was an ancient Egyptian ruler whose tomb was discovered and opened in 1923 . Legend has it that the archaeologists who opened the tomb were subject to a "mummy's curse," which would shorten their life spans. A team of scientists conducted an investigation of the mummy's curse. They reported that the 24 people exposed to the curse had a mean life span of 71.1 years with a standard deviation of 11.6 years, while a sample of
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.
King Tut was an ancient Egyptian ruler whose tomb was discovered and opened in
. Legend has it that the archaeologists who opened the tomb were subject to a "mummy's curse," which would shorten their life spans. A team of scientists conducted an investigation of the mummy's curse. They reported that the
people exposed to the curse had a
years with a standard deviation of
years, while a sample of
Westerners in Egypt at the time who were not exposed to the curse had a mean life span of
years with a standard deviation of
years. Assume that the populations are approximately normal. Can you conclude that the mean life span of those exposed to the mummy's curse differs from the mean life span of those not exposed? Let
denote the mean life span of those exposed to the mummy's curse and
denote the mean life span of those not exposed. Use the
level and the
-value method with the TI-84 Plus calculator.
do we reject or not
is there enough evidence or not
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