Statistics mathematics


Question description

The ages of the members of a gym have a mean of 44 years and a standard deviation of 12 years. What can you conclude from chebyshev's theorm about the percentage of gym members aged? 

The mean age of lead actress from the top ten grossing movies of 2010 was 29.6 with a standard deviation of 6.35 years. Assume the distribution of the actresses' age is approximately inimical and symmetric. Between what two values would you expect to find about 95% of the lead actresses' ages? 16.9-42.3, 10.55-48.65, 23.25-35.95, or none.

Find the score corresponding to the given value and use the z-score to determine whether the value is unusual. Consider a score to be unusual if it's z-score is less than -2.00 or greater than 2.00. Round the z-score to the nearest tenth. A weight of 224 pounds among a population having a mean weight of 158 pounds and a standard deviation of 23.5 pounds.

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