Task-1. A professor at a university is wishing to determine whether his introductory statistics class has a good grasp ofbasic math or not. For this purpose, he chooses six students from his class and gives them a math proficiency test. To havea good grip of basic maths, the professor wants the class score above 70 marks on the test. The scores that the sample of sixstudents gets are 62, 92, 75, 68, 83, and 95. Can the professor say with 90% confidence that the mean score for the wholeclass on the test would be above 70?

Assume that μ is the population mean score in math proficiency test.

Answered: Task-1. A professor at a university is…

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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Last year 46% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicated that 35% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 60 business owners. How many business owners in the survey plan to provide a holiday gift to their employees this year?
Recently a community college offered a 2-credit course to help students with math anxiety. At the beginning of the course, each student took a 30-question survey (called MARS-S); the higher the score, the more anxiety experienced by the student. The nine students remaining in the class took the same survey at the end of the course. The before and after scores for each of the nine students who completed the course are shown below, student before after 1 72 69 66 52 3 83 71 97 85 95 61 78 45 95 56 8. 52 43 93 62 Compute the correlation between before and after scores for these students. (Assu conditions have been satisfied and round your answer to the nearest 0.001.) the correlation Question Help: D Video O Message instructor Submit Question 目 Cip Co %23 24 96 & 4. 5 7 8. 9.
There are 160 questions on a test, and they are all multiple choice questions with four possible answers. For each question, only one answer is correct. Find the mean number of correct answers for someone who make random guesses for all of the questions.
What is the mean for the following scores: 2, 5, 4, 1, 8? A. 3 B. 4 C. 5 D. 20
As part of a statistics project, a teacher brings a bag of marbles containing 800 white marbles and 300 red marbles. She tells the students the bag contains 1100 total marbles, and asks her students to determine how many red marbles are in the bag without counting them. A student randomly draws 100 marbles from the bag. Of the 100 marbles, 32 are red. The data collection method can best be described as Survey Census Controlled study Clinical study The target population consists of The 1100 marbles in the bag The 300 red marbles in the bag The 32 red marbles drawn by the student The 100 marbles drawn by the student None of the above The sample consists of The 300 red marbles in the bag The 32 red marbles drawn by the student The 100 marbles drawn by the student The 1100 marbles in the bag None of the above Based on the sample, the student would estimate that marbles in the bag were red.
The times (in seconds) 878, 871, 906, 933, 930, 852, 890, 861, 882, 888, 897, 899, 879, 888, 848 Find the sample IQR is? And showing a boxplot of the data.

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