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Statistics Questions

Explore questions in the Statistics category that you can ask Spark.E!

example 10.2 the Medco pharmaceutical company has just developed a new antibiotic for children. 2% of children taking competing antibiotics experience headaches as a side effect. a researcher for the food and drug administration wise to know if the percentage of children taking the new antibiotic who experience headaches as a side effect is more than 2%. the researcher conducts a hypothesis test with H0: p=0.02 and H1: p > 0.02. explain what it would mean to make a type 1 error and a type 2 error.

example 10.1 determine the null and alternative hypothesis, state wether the test is two tailed, left tailed, or right tailed. a.) the Medco pharmaceutical company has just developed a new antibiotic for children. two percent of children taking competing antibiotics experienced headaches as a side effect. a researcher for the food and drug administration wishes to know if the percentage of children taking the new antibiotic who experience headaches as a side effect is more than 2%b.) the blue book price of a used 3 year old chevy corvette ZR1 is $86,012. grant wonders if the mean price of a used 3 year old chevy corvette ZR1 in the Miami metropolitan area is different from $86,012c.) the standard deviation of the contents in a 64 ounce bottle of detergent using an old filling machine is 0.23 ounce. the manufacturer wants to know if a new filling machine has less variability

what Z score is attached to 90% confidence interval?

what percentage of data is within 2 standard deviation?

T or F: Even if a distribution is skewed or bimodal, the distribution of means computed from a large number of samples (N>100) will always be approximately normal

what Z score is attached to 99.9% confidence interval?

what Z score is attached to 95% confidence interval?

what Z score is attached to 99% confidence interval?

what percentage of data is within 3 standard deviation?

what percentage of data is within 1 standard deviation?

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