ssignmentOOOOeThe following probability distributions of job satisfaction scores for a sample of information systems (IS) senior executives and middle managerrange from a low of 1 (very dissatisfied) to a high of 5 (very satisfied).Excel File: data05-21.xlsxJob SatisfactionScore723 45IS SenlorExecutives0.050.090.030.420.41ExecutivesProbabilityIS MiddleManagers0.040.100.120.460.28a. What is the expected value of the job satisfaction score for senior executives (to 2 decimals)?b. What is the expected value of the job satisfaction score for middle managers (to 2 decimals)?c. Compute the variance of job satisfaction scores for executives and middle managers (to 2 decimals).Middle managersd. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals).Sep 13 d. Compute the standard deviation of job satisfaction scores for both probability distributions (to 2 decimals).ExecutivesMiddle managerse. What comparison can you make about the job satisfaction of senior executives and middle managers?- Select your answer -0-Icon KeyExercise 05.21 (Expected Value and Variance)Ummehp►SaveSu

Given data: Probability Probability Job satisfaction score IS Senior Executives IS Middle…

Answered: The following probability distributions…

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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Lost-time accidents occur in a company at a mean rate of 0.3 per day. Using the data above, what is the probability that the number of lost-time accidents occurring over a period of 7 days will be more than 3?
Does playing Mozart for unborn babies result in having children with higher IQs? A psychologist obtains a random sample of 30 mothers in the first trimester of their pregnancy. The mothers are asked to play Mozart in the house at least 45 minutes each day until they give birth. We know that IQs are normally distributed with a mean of 100. A few years after their births the children were given an IQ test and the IQs of the 30 children in the study resulted in a sample mean of 104.2. Assume the population standard deviation for IQ of children is 15. Is there evidence that the children who listen to Mozart for at least 45 minutes each day during pregnancy have higher IQs at the 0.05 level of significance? Use the p-value approach. a. Define the parameter we are testing and setup a hypothesis test to see if the mean IQ of children who listened to Mozart at least 45 minutes a day during pregnancy is higher than the national mean of 100: b. Calculate the test statistics for this…
(first part of question is attached) (e) What is the probability that the sample proportion of students of adults living with parents or other relatives is higher than 0.3? (f) What is the probability that the sample proportion of adults living alone is between 0.1 and 0.15?
The time seen as normal meeting time in a day is 300 minutes. What is the probability that a manager is below 300 minutes on a given day? Based on your answer and your analysis Do you think the company should make an initiative to reduce manager time in meetings, so they have more time to develop teams? Explain. Each data point is a managers time in meetings for a given day. 515 221 433 399 280 533 326 337 469 269 423 494 521 334 341 258 490 340 264 499 489 252 231 377 201 290 471 537 257 488 228 464 379 307 365 331 277 262 537 356 431 533 274 236 249 316 350 522 304 354
Does playing Mozart for unborn babies result in having children with higher IQs? A psychologist obtains a random sample of 30 mothers in the first trimester of their pregnancy. The mothers are asked to play Mozart in the house at least 45 minutes each day until they give birth. We know that IQs are normally distributed with a mean of 100. A few years after their births the children were given an IQ test and the IQs of the 30 children in the study resulted in a sample mean of 104.2. Assume the population standard deviation for IQ of children is 15. Is there evidence that the children who listen to Mozart for at least 45 minutes each day during pregnancy have higher IQs at the 0.05 level of significance? Use the p-value approach. Select the correct conclusion for this test: We fail to reject the null hypothesis because the p-value is less than the level of significance. We fail to reject the null hypothesis because the p-value is greater than the level of significance. We…
r a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 510 and a standard deviation of 170 . The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 526 . What is the probability that a sample of 40 exams will have a mean score of 526 or more if the exam scores follow the same distribution as in the past? Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.
Is the expected value (mean) of the probability distribution of a random variable always one of the possible values of x from the distribution ? Explain
6. A study was conducted to determine the number of emergency calls per day received by the Conestoga Valley Fire Company. The data are shown here: # of phone calls Frequency 5 7 8 28 32 21 10 (a) Construct a probability distribution for the number of phone calls. (b) Find the mean number of phone calls, rounded to the nearest tenth.

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