select all the correct answers. select all the studies in which the results may have been skewed by bias. a…

select all the correct answers. select all the studies in which the results may have been skewed by bias. a study on employees commute time, with 90% of the data falling within 1 standard deviation of the population mean a study on the average life span of a type of plant, where 50% of the data fell above the population mean a study of the popularity of a particular music genre, with a small standard deviation about the mean a study with a significantly larger than expected standard deviation about the sample mean a study on the heights of a group of fourth - graders, where 90% of the data fell below the population mean a study of the average annual rainfall, with 28% of the data having a z - score greater than 1

select all the correct answers. select all the studies in which the results may have been skewed by bias. a study on employees commute time, with 90% of the data falling within 1 standard deviation of the population mean a study on the average life span of a type of plant, where 50% of the data fell above the population mean a study of the popularity of a particular music genre, with a small standard deviation about the mean a study with a significantly larger than expected standard deviation about the sample mean a study on the heights of a group of fourth - graders, where 90% of the data fell below the population mean a study of the average annual rainfall, with 28% of the data having a z - score greater than 1

Answer

Brief Explanations:

In a normal - distribution, about 68% of data falls within 1 standard deviation of the mean. If 90% of data falls within 1 standard deviation (as in the first option), it may indicate bias. When 90% of data falls below the population mean (fifth option), it is highly non - normal and likely biased. A significantly larger than expected standard deviation (fourth option) can also be a sign of bias in sampling or data collection. A z - score distribution should follow certain patterns in a normal distribution, and 28% of data having a z - score greater than 1 (sixth option) may suggest non - normality and potential bias. The second option with 50% of data above the mean is normal for a symmetric distribution, and a small standard deviation (third option) doesn't necessarily imply bias.

Answer:

a study on employees' commute time, with 90% of the data falling within 1 standard deviation of the population mean a study with a significantly larger than expected standard deviation about the sample mean a study on the heights of a group of fourth graders, where 90% of the data fell below the population mean a study of the average annual rainfall, with 28% of the data having a z - score greater than 1