possibleA college entrance exam company determined that a score of 21 on the mathematics portion of the exam suggests that astudent is ready for college-level mathematics. To achieve this goal, the company recommends that students take a corecurriculum of math courses in high school. Suppose a random sample of 200 students who completed this core set ofcourses results in a mean math score of 21.3 on the college entrancerexam with a standard deviation of 3.2 Do theseresults suggest that students who complete the core curriculum are ready for college-level mathematics? That is, are theyscoring above 21 on the mathematics portion of the exam? Complete parts a) through d) below(a) State the appropriate null and alternative hypotheses. Fill in the correct answers belowThe appropriate null and alternative hypotheses are Hoversus H(Type integers or decimals. Do not round)(b) Verity that the requirements to perform the test using the t-distribution are satisfied Select all that applyA. A boxplot of the sample data shows no outliers.B. The sample data come from a population that is approximately normalC. The students were randomly sampled.D. The sample size is larger than 30.E. The students' test scores were independent of one anotherF. None of the requirements are satisfied.(c) Use the P-value approach at the a=0.05 level of significance to test the hypotheses in part (a)O O O

ANSWER : The provided sample mean is X = 21 population standard deviation is σ = 3.2 Level of…

Answered: (a) State the appropriate null and…

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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Suppose that the sample average is 44.4 while the null hypothesis is that the population mean is 44. If the standard error is 1 then what is the t test statistic? (Answer to 4 decimal places if necessary).
The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z = -1.90, what is the correct statistical decision?
A data set includes data from student evaluations of courses. The summary statistics are nequals=8585, x overbarxequals=3.423.42, sequals=0.540.54. Use a 0.010.01 significance level to test the claim that the population of student course evaluations has a mean equal to 3.503.50. Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.
All other conditions being equal, does a larger sample size increase or decrease the corresponding magnitude of the z or t value of the sample test statistic?
Got stuck, and wasn’t sure what to do.
An ANOVA test is a way to find out if survey or experiment results are significant. In other words, they help you to figure out if you need to reject the null hypothesis or accept the alternate hypothesis. ANOVA is a test between groups to see if there’s a difference between them. State the four assumptions required for one-way ANOVA. How crucial are these assumptions? One-way ANOVA is a procedure for comparing the means of several populations. It is the generalization of what procedure for comparing the means of two populations? In one-way ANOVA, identify the statistic used a. as a measure of variation among the sample means. b. as a measure of variation within the samples. c. to compare the variation among the sample means to the variation within the samples. 4. What is a two-way ANOVA?
Which statement best represents the logic of a one way analysis of variance which also called ANOVA which is also called the F test? A. Under the null, The population means are equal to each other, so any difference in sample means will register as significant difference B. Under the null, at least one mean is different from the others, so if this condition is met with the data, it will register as a significant difference C. Under the null, The means are assumed to be equal; as a result the between group variance will equal the within group variance ; if the calculated SSbetween is sufficiently larger than SSbetween this would suggest the between group variation is larger than within group variation and indicate there is a significant difference amount the means D. Under the null, the means are assumed to be equal, as a result, the within group variance will be larger than the between group variance and this will be revealed by a significant F, which would indicate that the…
In a hypothesis test for the population variance, the alternate hypothesis is the population variance doesn't equal 17.0. The significance level to be used is 0.05 and the sample size to be taken is 25. The table value(s) to use from the chi-square distribution is/are 12.401 and 39.364. 13.181 39.364 40.671
I need help with this one please thank you
i. Combined ratio gives the higher estimated variance than the separate ratio estimator. A. True B. False ii. The difference estimator is always unbiased in simple random sample. A. True B. False
use the math problem uploaded to answer the question. Will you reject or fail to reject the null hypothesis? choose one: a) The P-Value is greater than the level of significance and so we reject the null hypothesis that the variances are equal. At 0.05 level of significance, we conclude that the variance for the first plot is greater than the variance for the second plot. b) The P-Value is greater than the level of significance and so we fail to reject the null hypothesis that the variances are equal. At 0.05 level of significance, we conclude that the variance for the first plot is equal to the variance for the second plot. c) The P-Value is greater than the level of significance and so we reject the null hypothesis that the variances are equal. At 0.05 level of significance, we conclude that the variance for the first plot is equal to the variance for the second plot. d) The P-Value is less than the level of significance and so we fail to reject the null hypothesis…
The accompanying data set includes volumes (ounces) of a sample of cans of regular Coke. The summary statistics are that a simple random sample has been selected. Use a 0.05 significance level to test the claim that cans of Coke have that consumers are being cheated? Click the icon to view the data set of regular Coke can volumes. Identify the null and alternative hypotheses. H₂: H₁: ▼ (Type integers or decimals. Do not round.) C n = 36, x= 12.193 oz, s = 0.106 oz. Assume mean volume of 12.00 ounces. Does it appear

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