QUESTION 40 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standa deviation of 15 points. Answer the following based on this information: What grade is required in order to be in the top 20 percent? QUESTION 41 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standa deviation of 15 points. Answer the following based on this information: What percentage of people received a grade between 89 and 95? QUESTION 42 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standar deviation of 15 points. Answer the following based on this information: What percentage of people received a grade of 94 or less? OUESTI ON A2 Click Save and Submit to save and submit. Click Save All Answers to save all answers.

QUESTION 40 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standa deviation of 15 points. Answer the following based on this information: What grade is required in order to be in the top 20 percent? QUESTION 41 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standa deviation of 15 points. Answer the following based on this information: What percentage of people received a grade between 89 and 95? QUESTION 42 The results from a statistics class' first exam are as follows: The average grade obtained on the exam by its 45 students is an 85, with a standar deviation of 15 points. Answer the following based on this information: What percentage of people received a grade of 94 or less? OUESTI ON A2 Click Save and Submit to save and submit. Click Save All Answers to save all answers.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Please help me with the following question.
Suppose we want to test whether or not the average SAT score at the University of Seychelles is significantly larger than the average SAT score at Vermont. Taking a random sample, we manage to get the following seven scores from Vermont students: Vermont: 1340 1500 1430 1440 1380 1470 1290 and the following nine scores from Seychelles students: Seychelles: 1540 1480 1390 1450 1440 1350 1520 1400 1600 Assuming that the standard deviation in SAT scores for students at Seychelles and Vermont is the same and equal to 77 points, test at the α=:05 significance level whether or not the average SAT score atthe University of Seychelles is larger than the average SAT score at Vermont.
If the mean speed for a major league fast ball is 90 miles per hour and the standard deviation is 5 miles per hour, what would the standardized score be for a pitch that is 97 miles per hour? O 0.4 4.0 1.4 O 1.0
1. IQ scores have a mean of 100 and a standard deviation of 16. Albert Einstein reportedly had an IQ of 160. Convert Einstein's IQ score to a z score. a. b. If we consider "usual IQ scores to be those that convert z scores between -2 and 2, is Einstein's IQ usual or unusual? C. The organization MENSA, which calls itself the "high IQ society", requires a score of 130 or higher. What percent of adults would qualify for membership? 2. In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The responses were normally distributed, with a mean of 5.4 and a standard deviation of 2.2. Find the probability that a randomly selected study participant's response was: a. Less than 4 b. Between 4 and 6 c. More than 8 3. The red blood cell count for a population of adult males can be approximated by a normal distribution, with a mean of 5.4 million cells…
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
Which of the following statements is TRUE about the mean scores of the two sections? Descriptive Statistics Score Section A Section B Valid 45 45 Missing Mean 8.556 9.222 Std. Deviation 5.995 6.420 O a. Section B is more knowledgeable on the selected topic in Geometry than section A. b. Section B's mean score is higher than that of Section A's. O c. Section A's mean score is higher than that of Section B's. O d. Section A is more knowledgeable on the selected topic in Geometry than section B.
The following is the height of several students: Jessi: 4'-5", Tom: 6'-1", Mike: 5-9", Julie: 5-1", Michelle: 5-1", Jody: 5-2", and Dave: 6-3". What is the standard deviation of the height of the students? (Round to the nearest whole number.)
A philosophy professor assigns letter grades on a test according to the following scheme. A: Top 12% of scores B: Scores below the top 12% and above the bottom 57% C: Scores below the top 43% and above the bottom 18% D: Scores below the top 82% and above the bottom 8% F: Bottom 8% of scores Scores on the test are normally distributed with a mean of 76.376.3 and a standard deviation of 7.77.7. Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 49.1, with a standard deviation of 9.2. Based on this information, complete the following statements about the distribution of the scores on the writing section for the recent year. A) according to Chebysheva theorem, at least 36% of the scores lie between ? And ?. Rouen answer to 1 decimal. B) according to Chebyshev’s theorem, at least what perfect of the scores lie between 30.7 and 67.5 ?
This is not graded! Do question 2.
A psychology teacher gave an objective-type test to a class of 400 students and, after seeing the results, decided that the scores were normally distributed. The mean score was 46, and the standard deviation was 15. The teacher assigned a grade of A to all scores of 76 or over, B to scores of 61 to 75, C to scores of 31 to 60, D to scores of 16 to 30 and F to scores below 16. About how many of each grade did the teacher assign? (Round your answers to the nearest whole number. Due to rounding, values may not add to the given sum. Recall that 34% of z-scores lie between 0 and 1, 13.5% lie between 1 and 2, and 2.5% are greater than 2.) A B C D F
Question 3 Match the questions with answers. Use this sample data for all questions: Table 2: Time taken in seconds. Sample 290, 340, 150, 300, 200, 100, 400, 500, 600, 89, 94 What is the mean for table 2? A. 278.45 What is the median for table 2? B. no mode v What is the mode for table 2? C. 172.06 v What is the sample standard deviation for table2 ? D. -0.46 Calculate the 75th percentile for table 2. E. 622.58 v What is the interquartile range for table 2? F. 290.00 What is the z score for an x value of 200 using table 2? G. 0.46 v Using the empirical rule to find the range of values containing 95% of the data from table 2, what is the upper value of the range? Hint: use the mean and standard deviation you previously calculated. H. 794.64 I. 177.95 J. 400.00 K. 300.00 L. 198.38 M. 100 N. 370