1. A researcher used a developed problem solving test to randomly select 50 Grade6 pupils. In this sample, x = 80 and s = 10. The u and the standard deviation ofthe population used in the standardization of the test were 75 and 15,respectively. Use the 95% confidence level to answer the following questions:a. Does the sample mean differ significantly from the population mean?b. Can it be said that the sample mean is above average?

Answered: Image /qna-images/answer/0f60b0aa-32d2-455a-b880-24f61373bde3.jpg

Answered: 1. A researcher used a developed…

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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Allan, a Grade 12 senior high school student, wants to estimate the average number of students who will pursue collage degree in a certain school. How many sample sizes does he need, if he plans to use 98% confidence, 0.5 as the margin of error, and a standard deviation of 5.a. 542b. 543c. 540d. 533
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We wish to construct a 90% confidence interval for the population mean weight of newborn elephant calves. A sample of forty-nine weights of newborn elephants are collected. The sample mean is 254.148 pounds and a sample standard deviation of 13.265 pounds. a. Complete the following for the necessary statistics. i. How many places are your statistics rounded to? ? ✓ ii. Fill in the blank for the following statistics and s= iii. Which of the following statsitcs listed is the point estimate? v b. Verify the requirements for the confidence interval i. Which test should be used to verify the requirements? Select an answer ii. Has the requirements for the test met?? n = c. What is the sampling distribution Select an answer d. What are the two critical values? Round your answer to at least four decimal places right = e. What is the margin of error? Enter N/A if the margin of error does not exist. left = E= f. What is the confidence interval for the population parameter? Upper bound: g. State…
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