A random sample of 144 observations has a mean of 20, a medi…

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is known to equal 4.8. The 95.44% confidence interval for the population mean is 19.2 to _____________. Refer to the following formula and table. σ x   =   σ n z = x – μ σ x Standard Error = σ n Margin of Error = z α / 2   *   σ n Confidence Interval = x   ±   z α / 2 * σ n z dsistribution table from 0.0 to 2.49.jpg

A random sample of 36 students at a community college showed…

A random sample of 36 students at a community college showed an average age of 25 years. Assume the ages of all students at the college are normally distributed with a standard deviation of 1.8 years. The 98% confidence interval for the average age of all students at this college is ________________________. Refer to the following formula and table. σ x   =   σ n z = x – μ σ x Standard Error = σ n Margin of Error = z α / 2   *   σ n Confidence Interval = x   ±   z α / 2 * σ n z dsistribution table from 0.0 to 2.49.jpg

Frank was concerned that his mother was suffering from neuro…

Frank was concerned that his mother was suffering from neurocognitive disorder. She had gotten lost at the shopping center, misplaced objects, and forgotten names of friends and acquaintances. Her symptoms gradually disappeared after her physician put her on antidepressant medication. Her diagnosis was most likely