State the null and alternative hypotheses and the level of significance for the question **Title: Impact of Preschool Attendance on Developmental Outcomes in Kindergarten Children****Introduction:**A research study investigates the developmental effects of preschool attendance on young children, specifically examining if increased time away from mothers influences the likelihood of developmental problems in kindergarten.**Study Overview:**- **Research Question:** Are children who spend more time away from their mothers more likely to exhibit developmental problems in kindergarten?- **Methodology:** - Using a standardized scale, the average behavioral problem rating for kindergarten children is 36.6, with a standard deviation of 8. - A sample of 15 kindergarten children who spent at least 20 hours per week in childcare during the previous year was analyzed.**Data Collection:**- The behavioral scores obtained from the sample are as follows: 38, 39, 42, 43, 48, 44, 38, 36, 42, 37, 36, 47, 48, 38, 41.**Analysis:**- Statistical testing is conducted at a 0.01 level of significance to determine if children spending more time away from their mothers during preschool are more prone to developmental problems in kindergarten.This study aims to offer insights into the implications of early child care environments on subsequent developmental metrics.

Consider that μ is the true rating of behavior problems in kindergarten children.

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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A change is made that should improve student satisfaction with the parking situation at your school. Before the change, 37% of students approve of the parking that's provided. The null hypothesis Ho : p = 0.37 is tested against the alternative H.: p > 0.37 The given hypotheses are incorrect. What are the appropriate hypotheses for performing this significance test? Ho : p = 0.37; Ha :p> 0.37, where p= the true proportion of students that approve of the parking that's provided. Ho : p = 0.37; Ho : p + 0.37, where p= the true proportion of students that approve of the parking that's provided. Ho : p > 0.37; Họ : p = 0.37, where p= the true proportion of students that approve of the parking that's provided. Ho : p = 0.37; H, : p + 0.37, where p the sample proportion of students that approve of the parking that's provided. Ho : p > 0.37; Họ : p = 0.37, where p the sample proportion of students that approve of the parking that's provided.
Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 23 people who drank ethanol and another group of 23 people given a placebo. The errors for the treatment group have a standard deviation of 2.40, and the errors for the placebo group have a standard deviation of 0.78. Assume that the two populations are normally distributed. Use a 0.05 significance level to test the claim that both groups have the same amount of variation among the errors. Let sample 1 be the sample with the larger sample variance, and let sample 2 be the sample with the smaller sample variance. What are the null and alternative hypotheses? OA. H₂:0² = 0²/2 OB. H₂:0² = 0²/2 H₁: 0²/12 #02/22 H₁:0² > 0²/2 ỌC Họỏi cơ OD. Ho: 0²/02/2 H₁:0² <0² H₁:0² = 0²/2 Identify the test statistic. (Round to two decimal places as needed.) Use technology to identify the P-value. (Round to three decimal places as needed.)
Can you give a specific example of possible wording of both a null and research hypothesis?
It is a hypothesis which is tested for the purpose of rejection under the assumption that it is true. A. Alternative hypothesis B. Composite hypothesis C. Null hypothesis D. Statistical hypothesis
Among a simple random sample of 331 American adults who do not have a four-year college degree and are not currently enrolled in school, 159 said they decided not to go to college because they could not afford school. A. A newspaper article states that only a minority of the American adults who decide not to go to college do so because they cannot afford it and uses the point estimate from this survey as evidence. State the null and alternative hypotheses both in symbols and in words. B. State and check the conditions for the hypothesis test.
Only about 14% of all people can wiggle their ears. Is this percent lower for millionaires? Of the 400 millionaires surveyed, 40 could wiggle their ears. What can be concluded at the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: ? Select an answer V (please enter a decimal) H1: ? v Select an answer V (Please enter a decimal) c. The test statistic ? v (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 3 decimal places.) e. The p-value is ? v a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest the population proportion is not significantly lower than 14% at a = 0.10, so there is statistically insignificant evidence to conclude that the population proportion of millionaires who can wiggle their ears is lower than 14%. O The data suggest the populaton proportion is significantly lower…
What are the null and alternative hypotheses? A.H0: The racial distribution is the same in at least two of the four regions. Ha: The racial distribution is not the same in at least two of the four regions. B. H0: The racial distribution is the same in each of the four regions. Ha: The racial distribution is not the same in each of the four regions. C. H0:The racial distribution is not the same in each of the four regions. Ha:The racial distribution is the same in each of the four regions. D. H0: The racial distribution is not the same in at least two of the four regions. Ha: The racial distribution is the same in at least two of the four regions. Find the test statistic. χ2= (Round to three decimal places as needed.) Find the P-value. P= (Round to three decimal places as needed.) Choose the correct conclusion below. A. Do not reject H0. The data do not provide sufficient evidence that there is a difference. B. Do not reject…

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