Company: Auronova_MCQ
Difficulty: medium
The interquartile range (IQR) is a measure of: The central tendency of the data The spread between the lower and upper quartiles The spread of the data The total range of a dataset Which of the following statements about hypothesis testing is most accurate? To test the claim that X is greater than zero, the null hypothesis would be H₀: X > 0. The power of a test is one minus the probability of a Type I error. The probability of a Type I error is equal to the significance level of the test. If you can disprove the null hypothesis, then you have proven the alternative hypothesis. If 'x' is a positive real number such that (x² + x⁻²) = 47, the value of (x + x⁻¹) is: 57 123 7 129 What is the main purpose of measures of central tendency? To represent the typical or middle value in a dataset To measure the correlation between variables To identify outliers in the data To show the spread of data In a moderately skewed distribution, the relationship between the mean, median, and mode can be