A student was analyzing a data set that was Normally distributed with a mean of . She calculated the z-score of a score z inthe data set and looked up this value on a z-table (the same z-tables we have been using in class). The table gave a value of0.4918 in this instance. Which of the following statements is true.O Any score in this data set has a 49.18% chance of being between 2 and z.O The score has a probability of 49.18.O The standard deviation of this data set is 0.4918O The score x is 0.4918 standard deviations away from the mean.

In general normal distribution table gives the probability of left of z score that is probability of…

Answered: A student was analyzing a data set that…

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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A researcher wishes to see if there is a difference in the number of stories in the tall buildings of Makati, Ortigas, and Bonifacio Global City. The researcher randomly selects five buildings in each city and records the number of stories in each building. The data are shown in the table below. At a = 0.05, can it be concluded that there is a significant difference in them mean number of stories in the tall buildings in each city? Do you reject the null hypothesis? Refer to QUESTION NO. 3a. Bonifacio Global Makati Ortigas City 53 85 98 67 52 54 75 60 45 52 57 41 36 94 83 34 42 49 Select one: O True O False 万以

Which of the following statements is true of Group 2’s mean FIQ score? Group of answer choices: 1. Group 2’s mean FIQ score is higher than Group 1’s mean FIQ score 2. Group 2’s mean FIQ score is lower than Group 1’s mean FIQ score 3. Group 2’s mean FIQ score is higher than the mean FIQ scores for Groups 1 and 3 4. Group 2’s mean FIQ score is lower than the mean FIQ scores for Groups 1 and 3 None of the above Which of the following statements is true of Group 3’s mean FIQ score? Group of answer choices: 1. Group 3’s mean FIQ score is higher than Group 1’s mean FIQ score 2. Group 3’s mean FIQ score is lower than Group 1’s mean FIQ score 3. Group 3’s mean FIQ score is higher than the mean FIQ scores for Groups 1 and 2 4. Group 3’s mean FIQ score is lower than the mean FIQ scores for Groups 1 and 2 None of the above
Joselyn hopes to receive a grade of B or better in her statistics class. Currently she has scored 75, 83, and 81 on her three in-class tests and also has a homework average of 88. Her professor calculates the class grade by finding the mean of five grades: three in-class tests, the homework average and the final exam. What is the minimum score Joselyn must earn on the final exam to have a class grade (mean) of 80? A. 67 B. 95 C. 70 D. 73
Tiffany is a manager who needs to fire the worst performing 3% of employees. At her organization, employee performance is a normally distributed variable. Tiffany should fire employees who have a performance score that correspond with a z-score less than or equal to _____
Last week Jenni had exams in Spanish and in Cognition. She scored 5 points above the mean on both exams. From this information, what can you conclude about the z-scores for Jenni’s two scores? a. Jenni will have a higher z-score for the exam with the lower mean. b. None of the other choices is correct. c. Jenni has identical z-scores for the two exams. d. Both of Jenni's z-scores are positive.
None
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Out of 57 high school female athletes, data was collected on how much they were able to bench press. From this data we get x=79.9,Q1=70, Q2=80, and Q3=90. Determine if the data distribution is skewed or symmetric. Give 2 reasons to back up your answer.
The distribution of number of goals scored per match in the 15 home and 14 away matches so far this season for one team in the English Premier Soccer League is shown below. HOME AWAY 2 4 Goals Scored Per Match Which of the following statements is true? (A) The mean number of goals scored in AWAY matches is less than the mean number of goals scored in HOME matches. (B) The range of goals scored for AWAY matches is greater than the range of goals scored for HOME matches. (C) The shape of the distribution of HOME goals scored is left-skewed. (D) The median number of goals scored for AWAY matches is more than the median number of goals scored for HOME matches. (E) The number of AWAY matches in which the team scored three or more goals is three.
A researcher tests whether his students are smarter than the general population. He knows the mean of the population is 100 for the Wechsler Adult Intelligence Scale. He tests the mean of his student’s scores against the mean of the population. What kind of t-test should be used?
So far, Walter has scores of 18, 17, 19, and 21 points for the first four science quizzes. What does he need to score on the next quiz in order to achieve an average(mean) score of 20 points per quiz?

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