State the random variable and the parameter in words for the question. A researcher is exploring the impact of preschool on young children's development, specifically questioning whether children who spend more time away from their mothers are more or less likely to exhibit developmental problems in kindergarten. The study utilizes a standardized scale, where the average rating of behavioral problems in kindergarten children is 36.6, with a standard deviation of 8. A random sample of 15 kindergarten children, who spent at least 20 hours per week in child care during the previous year, produced the following scores:38, 39, 42, 43, 48, 44, 38, 36, 42, 37, 36, 47, 48, 38, 41The study is conducted at a 0.01 level of significance to test the hypothesis that children spending more time away from their mothers are more prone to develop behavioral issues in kindergarten.

Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Answered: A researcher is testing the effect…

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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Each question on a multiple-choice exam has four choices. One of the choices is the correct answer, worth 6 points, another choice is wrong but still carries partial credit of 4 points, and the other two choices are worth 0 points.If a student picks answers at random, what is the expected value of his or her score for a problem? pointsIf the exam has 90 questions, what is his or her expected score?
Choose the letter that corresponds to the correct answer Which of the following is an example of dicrete variables? a. Weight of students b. Number of purple marble in the basket I. с. Distance travelled between tricycles d. Height of the students in a certain class I. Which are the possible values of the random variable for the number of heads when you toss two coins а. 0,1,2,3 b. 1,2,3 с. 0,1 d. 0,1,2 II. Which of the following statement describe a discrete random variable? a. The average increase in height of baby each year b. The number of avocado produced by an avocado tree each year c. The length of span of a 10 months baby d. The average increase in weight of baby each year Which of the following will yield a higher interest? a. Investing in a bank that offers a simple interest rate of 10% annually for 2 years b. Investing in a cooperative that offers an interest rate of 10% compounding annually for IV. 2 years c. Both A and B d. Saving money in a piggy bank for 2 years Which of…
Diagnostic tests of medical conditions can have several types of results. The test result can be positive or negative, whether or not a patient has the condition. A positive test (+) indicates that the patient has the condition. A negative test (−) indicates that the patient does not have the condition. Remember, a positive test does not prove the patient has the condition. Additional medical work may be required. Consider a random sample of 200 patients, some of whom have a medical condition and some of whom do not. Results of a new diagnostic test for the condition are shown. Condition Present Condition Absent Row Total Test Result + 108 22 130 Test Result − 20 50 70 Column Total 128 72 200 Assume the sample is representative of the entire population. For a person selected at random, compute the following probabilities. (Enter your answers as fractions.) (a) P(+ | condition present); this is known as the sensitivity of a test.(b) P(− | condition present); this is…
You are to submit 2 real life examples of statistical statements and state if they are biased or unbiased Example: A toothpaste advertisement states that 3 or 4 people prefer their product. This could be a biased survey, one that is not based on a random sample. They could have asked exactly 4 people about their product. An unbiased sample accurately represents the population. Each member of the population is equally to be chosen Example: A person wants to find out how many people prefer chocolate of vanilla ice cream. To get an unbiased sample, she would pick out a few of the ice cream shops in her town and survey people leaving the establishment.
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