Scores on an aptitude test are normally distributed with a mean of 1000 and standard deviation of120.Use the Cumulative Z-Score Table to answer the following questions.Write your answer rounded to the nearest whole number.If 1,590,000 students take the test......how many would you expect to score below 1156?...how many would you expect to score above 1156?...how many would you expect to score below 1066?...how many would you expect to score above 1066?...how many would you expect to score between 1066 and 1156?studentsstudentsstudentsstudentsstudents

It is give that the value of mean is 1000 and standard deviation is 120. If 1,590,000 student take…

Answered: Scores on an aptitude test are normally…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An aptitude test was taken by 800 students at the Fairfield Middle School. The box-and-whiskers plot below shows the distribution of their scores. 40 50 60 70 80 90 100 (a) How many students scored above 88? students (b) How many students scored below 72? students (c) How many scores are represented in each quartile? Scores (d) What percent of the students had scores of at least 54? %
The mean scores for students in a statistics course (by major) are shown below. What is the mean score for the class? 9 engineering majors: 90 5 math majors: 94 13 business majors: 76 The class's mean score is________ (Type an integer or a decimal rounded to two decimal places as needed.)
The graph illustrates the distribution of test scores. The mean score was 73 and the standard deviation was 9. 46 55 64 73 82 91 100 Distribution of Test Scores Use the "Empirical Rule", not a calculator or other technology. a. What is the approximate percentage students who scored between 64 and 82 on the test? b. What Is the approximate percentage of students who scored between 55 and 91 on the test? 96 C. What is the approximate percentage of students who scored less than 55 on the test? d. What is the approximate percentage of students who scored between 73 and 82 on the test?
Which of the following is an example of doing inferential statistics? You calculate the average grade on an exam in a class of 5th grade math students to see if they did better or worse than last year. You lookup the median and the standard deviation of the age for the U.S. population from U.S. Census data. You use a sample of homes in Rancho Cucamonga to draw a conclusion about the mean home price for all Rancho Cucamonga homes. You compare the distributions of scores for two Social Science 10 classes to see which class did better on the exam.
An Excel assignment counts for 0-10 points. The scores in a class of 12 students are recorded as follows:1 5 5 6 7 7 8 8 8 9 10 10 What is the deviation of the score 10 from the mean in 13a (recall that this involves a subtraction of the mean from the particular score)? I think I got answer but want to check.
The following stem-and-leaf plot represents scores on a university psychology test. If one more person was to take the test, which value would most likely represent the person's expected score? Stem Leaf 5 07 169 7 001258 8 359 24 O 57 O 66 O 70 O 85
Students in a class were given a quiz. These were their scores: 7 8 10 9 8 8 4 6 7 8 9 8 6 8 5 What is the standard deviation for these students' quiz scores?
Older people often have a hard time finding work. A research group reported on the number of weeks it takes a worker aged 55 plus to find a job. The data on number of weeks spent searching for a job is given in the table below. At 95% confidence, what is the margin of error? (Round your answer to four decimal places.) ___ weeks What is the 95% confidence interval estimate of the mean? (Round your answers to two decimal places.) ____ weeks to ____ weeks
For the sample scores in the frequency distribution table below, the median is 1 4 4. 1 1 1 3.
a. t test for population mean or z test for population proportion b. μ or p H0: =, <, >, or ≠ H1: =, <, >, or ≠ c. z or t
During an experiment, the following times (in seconds) were recorded. Find the mean. 6.3, 5.4, 6, 3.2, 5.4, 5.5 ... The mean is (Round to one decimal place as needed.) ...
A sample of n = 6 scores has a mean of M = 5. One person with a score of X= 12 is added to the distribution. What is the mean for the new set of scores? O M= 8

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