12. You wish to estimate, with 99% confidence, the population proportion of U.S. adults who support labeling legislation for genetically modified organisms (GMOS). Your estimate must be accurate within 3% of the population proportion. No preliminary estimate is available. Find the minimum sample size needed. 13. A research center claims that more than 23% of U.S. employees have changed jobs in the past three years. In a random sample of 150 U.S. employees, 61 have changed jobs in the past three years. At a =0.10, is there enough evidence to support the center's claim? A. State the hypotheses: Ho: На: B. Calculate the z test statistic: (Can be done on calculator) Round to 2 decimal places. C. Calculate the p-value: (Can be done on calculator) Round to 4 decimal places. D. Decision (Circle one): Reject Ho Fail to Reject Ho E. Interpret the meaning of your decision in a complete sentence.
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.
13)
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