The test scores for the analytical writing section of a particular standardizedtest can be approximated by a normal distribution, as shown in the figure.(a) What is the maximum score that can be in the bottom 10% of scores?(b) Between what two values does the middle 80% of scores lie?(a) The maximum score that can be in the bottom 10% is(Round to two decimal places as needed.)H 3.3Jeo=0.760.63.3Score-co

Answer:- Given, mean, µ = 3.3 Standard deviation, σ = 0.76 Let, X is the score of any random…

Answered: The test scores for the analytical…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Assume that you want to test the claim that the paired smaple data come from a population for which the mean difference is population mean d=0. Compute the value of the t test statistic. Round intermediate calculations to four decimal places as need and final answers to three decimal places as needed x 9 6 7 5 12 y 6 8 3 6 7
Score: 90/260 • Question 11 Suppose your manager indicates that for a normally distributed data set you are analyzing, your company wants data points between z = -1.6 and z = 1.6 standard deviations of the mean (or within 1,6 standard deviations of the mean). What percent of the data points will fall in that range? Answer: percent (Enter a number between 0 and 100, not 0 and 1 and round to 2 decimal places)
For each problem, select the best response. (a) The scores of adults on an IQ test is approximately Normal with mean 100 and standard deviation 15. Corinne scores 118 on such test. Her z-score is about O A. 0.67 OB. 1.2 O C. 7.87 OD. 18 O E. None of the above. (b) A researcher wishes to determine whether the rate of water flow (in liters per second) over an experimental soil bed can be used to predict the amount of soil washed away (in kilograms). In this study, the explanatory variable is the O A. size of the soil bed. O B. rate of water flow. OC. amount of eroded soil. O D. depth of the soil bed. O E. None of the above. (c) Smokers don't live as long (on the average) as nonsmokers, and heavy smokers don't live as long as light smokers. You regress the age at death of a group of male smokers on the number of packs per day they smoked. The slope of your regression line A. will be greater than zero. OB. will be less than zero. OC. must be between 1 and 1. D. can't tell without seeing…
In a particular statistics exam, the 35th percentile of final exam score is 42, and the 70th percentile of final exam score is 76. A histogram of the scores approximately follows the normal curve. What is the approximate standard deviation of the final exam scores? Hints: What is the z value in the normal table that gives you closest to 35% of the area between -z and z? Now what does that tell you about the number of SDs in between 42 inches and 76 inches? You might find it helpful to draw a picture of the normal curve with original units and standard units. Group of answer choices a. 7.5 b. 13.1 c. 20.7 d. 37.8
On a scale of 0 to 10, the student rated her enjoyment of stats as an 8. The average rating among students is 5, and the average spread around that mean is 1.5. I got the z score as 2.0. Can you kindly help with these questions below? What percent of college students enjoy statistics more? What percent of college students enjoy statistics less?
(a) The figure to the right represents the normal curve with μ=266 days and σ=16 days. The area to the left of X=245 is 0.0947. Provide two interpretations of this area. Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) A. The proportion of human pregnancies that last more than nothing days is nothing. B. The proportion of human pregnancies that last less than nothing days is nothing.
To estimate the mean score ?μ of those who took the Medical College Admission Test on your campus, you will obtain the scores of an SRS of students. From published information you know that the scores are approximately Normal with standard deviation about 6.56.5 . You want your sample mean ?¯x¯ to estimate ?μ with an error of no more than 1.41.4 point in either direction. (a) What standard deviation must ?¯x¯ have so that 99.7%99.7% of all samples give an ?¯x¯ within 1.41.4 point of ?μ ? Use the 68–95–99.768–95–99.7 rule. (Enter your answer rounded to four decimal places.) standard deviation of ?¯=x¯= (b) How large an SRS do you need in order to reduce the standard deviation of ?¯x¯ to the value you found? (Enter your answer rounded to the nearest whole number.)
(I'm having a hard time solving for the data, can you please help? The first photo is the given values, and the second the equation for the solution.) Identify the following to calculate the test statistic and will input the given to the following formula: The sample mean (x̄) The population mean (μ) The sample standard deviation (s) Number of observations (n)
thank you in advance!!!
the mean = 146, and s = 35 Question #4 A score of 181 is how many z-scores above the mean?
A B. The mean blood cholesterol level for all men aged 20 to 34 years is p = 188 mg/dl with a standard devlation of a = 41 mg/dl. We suspect that the mean for cross-country runners is lower. A random sample of 20 cross-country runners yielded a mean level of 172 mg/di. SHOW YOUR FORMULAS AND ALL WORK ON THIS PAGE What is the standard deviation of the mean length X? Standard Deviation 41.0000
ACT scores range from 1 to 36 and are normally distributed where N (21.5, 5.4). SAT scores• range from 600 to 2400 and are normally distributed where N (1498, 316). Jorge scores 2090 on the SAT. If both tests measure the same thing, what score on the ACT is equivalent to Jorge's SAT score?

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