select all the studies in which the results may been skewed by bias.For each study,assume a normal distribution. O a study of employee satisfaction, with 25% of the data having a z-score greater than 1 a study with a significantly smaller than expected standard deviation about the sample mean a study on crosswalk wait times with 95% of the data falling within 1 standard deviation of the population mean a study on the average length of hiking trails in all state parks, with 50% of the data falling below the population mean a study of employees' annual number of vacation days, with a large standard deviation about the mean a study on cooking times at high altitudes, with 90% of the data falling above the population mean

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