Find the probability that if an individual score is randomly selected from a population with a...
A normal distribution of scores in population has a mean of µ = 100 with σ = 20. A. What is the probability of randomly selecting a score greater than X = 110 from this population? B. If a sample of n = 25 scores is randomly selected from this population, what is the probability that the sample mean will be greater than M = 110?
Using the table, find for a randomly selected individual from this population the probability that he or she: Is in the age interval 40-49 and weighs 170-189 lbs 400 adult males with angina pectoris are classified by age and weight as follows: Weight in Pounds I 130-149 150-169 I 170-189 I >=190I Total Age years) 30-39 10 20 20 40 90 40-49 10 15 50 70 145 50-59 15 50 40 110 60-69 5 10 15 25 55 | 175...
Find the probability that a randomly selected piece of data from a normal population will have a z-score between 1.28 and 2.25
A population is normally distributed with μ=200 and σ=25. a. Find the probability that a value randomly selected from this population will have a value greater than 245. b. Find the probability that a value randomly selected from this population will have a value less than 190. c. Find the probability that a value randomly selected from this population will have a value between 190 and 245.
3. On one I.Q. test, the mean score (µ) is 100 and the population standard deviation (σ) is 15. A sample of 50 scores is selected from a very large population. Find the probability that the mean of the sample group is more than 103.
1) What is the probability of a randomly selected value from a normally distributed population falling within 1.5 standard deviations of the mean? 8) What is the probability of a randomly selected value from a normally distributed population NOT being between 0.68 standard deviations below the mean and 1.5 standard deviations above the mean? ***For the following questions, assume a business has an average daily revenue of $1200 and revenue levels are found to be normally distributed with a standard...
The probability that an individual randomly selected from a particular population has a certain disease is 0.04. A diagnostic test correctly detects the presence of the disease 94% of the time and correctly detects the absence of the disease 96% of the time. If the test is applied twice, the two test results are independent, and both are positive, what is the (posterior) probability that the selected individual has the disease? [Hint: Tree diagram with first-generation branches corresponding to Disease...
is selected at random from the population represented by the graph. Find the probability that the member selected at random is from the shaded area of the graph. Assume the variable x is SAT Cica Reading Scaes Q 200 4x< 400 514 σ-122 200 400 800 Score The probability that the member selected at random is from the shaded area of the graph is(Round to four decimal places as needed)
In a region, there is a 0.8 probability chance that a randomly selected person of the population has brown eyes. Assume 11 people are randomly selected. Complete parts (a) through (d) below. a. Find the probability that all of the selected people have brown eyes. The probability that all of the 11 selected people have brown eyes is (Round to three decimal places as needed.) b. Find the probability that exactly 10 of the selected people have brown eyes. The...
Suppose that we will randomly select a sample of 72 measurements from a population having a mean equal to 18 and a standard deviation equal to 9. (a) Describe the shape of the sampling distribution of the sample mean. Do we need to make any assumptions about the shape of the population? Why or why not? (b) Find the mean and the standard deviation of the sampling distribution of the sample mean. (Round your σx⎯⎯ answer to 1 decimal place.)...