Given below are the sodium contents (in mg) for seven brands of hot dogs rated as "very good." 430 460 360 370 280 540 540 S USE SALT (a) Use the given data to produce a point estimate of u, the true mean sodium content for hot dogs. (Round your answer to four decimal places.) (b) Use the given data to produce a point estimate of o?, the variance of sodium content for hot dogs. (Round your answer to four decimal places.) g2 = (c) Use the given data to produce an estimate of o, the standard deviation of sodium content. (Round your answer to four decimal places.) = Is the statistic you used to produce your estimate of o unbiased? (Hint: See the discussion following Example 9.3.) O Yes O No
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.
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