ses/2177802/assignments/13744575A MapsQuestion 11>When doing a T-Test to compare two population means with unknown population standard deviations, theformula for finding the Degrees of Freedom is pretty messy:s?d. f.2n -1n2 -1n2You can compute this by hand, or just do the 2-SampTTest on a calculator and select "No" after the Pooled?prompt.nlineConsider the random sample data in this table:Роpn124107102912012Use a calculator to find the following for a two tailed test. Round all answers to three decimals.roctora. d. f. :b. Т:с. Р - valuе:You can also use a "simpler" estimation for Degrees of Freedom: d. f. = smaller sample size - 1Using this formula, with the STS you got for part b, find:d. d. f. estimate:e. P – value :MacBook ProG Search or type URL244.Y.

Given: Sample sizes: n1=24n2=29 Sample means: x¯1=107x¯2=120 Sample standard deviations:…

Answered: ses/2177802/assignments/13744575 A Maps…

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 company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 239.7-cm and a standard deviation of 0.8-cm. For shipment, 5 steel rods are bundled together.Find P58, which is the average length separating the smallest 58% bundles from the largest 42% bundles. P58 = -cmEnter your answer as a number accurate to 2 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
There is a weekend fishing competition that Boris participates in each year. There are several other fishing boats that participate in this competition. Among all of the competitors, the number of fish caught this year had a mean of 31 fish and a standard deviation of 6 fish. Boris caught 38 fish. (a) Find the z-score of the number of fish that Boris caught relative to the numbers of fish caught among all the competitors. Round your answer to two decimal places. (b) Fill in the blanks to interpret the z-score of the number of fish that Boris caught. Make sure to express your answer in terms of a positive number of standard deviations. The number of fish that Boris caught was standard deviations (Choose one) the mean number of fish caught among all the competitors.
can you give me a sample of this one? Test on mean for one sample
Part b and c
Using an evenly distributed data population of 8,000 samples, how many Would fall between a Z-score of -0.5 and +0.5? (blank)
You are part of a trivia team and have tracked your team's performance since you started playing, so you know that your scores are normally distributed with u = 88 and a = 15 Recently, a new person joined the team, and you think the scores have changed Sample data is: n = 28, sample mean = 72 Assuming a two tailed test, What is the test statistic (Z)?
The mean points obtained in an aptitude examination is 179points with a variance of 225. What is the probability that the mean of the sample would differ from the population mean by less than 2.5 points if 77exams are sampled? Round your answer to four decimal places.
A test statistic for one of the tests in this unit is given, along with information about degrees of freedom. Give the p-value and indicate whether the results are significant at the 5% level. An analysis of variance test with F-statistic 8.71 and df -numerator 3 and df -denominator = 17 Round your answer to four decimal places. p-value
a. Use a = 0.10 to test for a statistically significantly difference between the population means for first- and fourth-round scores. What is the p-value? t-value (to 3 decimals) Degrees of freedom p-value is greater than 0.20 What is your conclusion? There is no significant difference between the mean scores for the first and final rounds. b. What is the point estimate of the difference between the two population means? (to 2 decimals) For which round is the population mean score lower? First round c. What is the margin of error for a 90% confidence interval estimate for the difference between the population means? (to 3 decimals) Could this confidence interval have been used to test the hypothesis in part (a)? Yes Explain. Use the point of the difference between the two population means and add and subtract this MOE. If zero is in the interval the difference is not statistically significant. If zero is not in the interval the difference is statistically significant.
Analysis of variance compares the means of a response variable for several groups. ANOVA compares the variation within each group to the variation of the mean of each group. The ratio of these two is the F statistic from an F distribution with (number of groups - 1) as the numerator degrees of freedom and (number of observations - number of groups) as the denominator degrees of freedom.You intend to conduct an ANOVA with 7 groups in which each group will have the same number of subjects: n=16n=16. (This is referred to as a "balanced" single-factor ANOVA.)What are the degrees of freedom for the numerator?d.f.(treatment) = What are the degrees of freedom for the denominator?d.f.(error) =
Hello could you explain this and priovide excel/calculator formulas? Thank you very much!
Study groups are equivalent means that they are exactly the same number of male and female participants in each group statistically the same because sampling error is eliminated experimentally the same statistically equal, with small differences between groups due to sampling error

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