According to the National Institute of Mental Health website, the prevalence (base rate) of schizophrenia is less than 1% of the populat For purposes of this question, let's assume that it is 1%. Suppose we have a diagnostic test for schizophrenia that is 90% correct for those who have the disorder and also 90% correct for those who do not have it. ACTUAL Schizophrenic Normal

I don’t know how to calculate ‘d.’ into my TI-84 Plus calculator. Please show me step by step.

Statistically what is “all the children are above average.” mean

Hello, An item is rated on a scale of 0 to 3 with 0 being no signs of symptoms  and 3 being the most severe. Is this item categorical or continuous? Is a total score a continuous or categorical measure?

PLEASE ANSWER ALL THE PARTS OF THE QUESTION ( THIS IS NOT A GRADED ASSIGNMENT)

Overproduction of uric acid in the body can be an Indication of cell breakdown. This may be an advance indication of liness such as gout, leukemia, or lymphoma. Over a period of months, an adult male patient has taken five blood tests for uric acid. The mean concentration was x- 5.35 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal, with a-1.81 mg/dl. (a) Find a 95 % confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error?  (b) What conditions are necessary for your calculations? (c) Interpret your results in the context of this problem. (d) Sample size Find the sample size necessary for 95% confidence level with a maximal margin of error E = 1.10 for the mean concentration of uric acid in this patient's blood. Thank you

The mean performance score of a large group of fifth-grade students on a math achievement test is 76. The scores are known to be normally distributed. What percentage of the students had scores more than 2.1 standard deviations above the mean? Click here for page 1 of the Areas under the Normal Curve Table Click here for page 2 of the Areas under the Normal Curve Table The percentage of the students that had scores more than 2.1 standard deviations above the mean is%. (Round to two decimal places as needed.)