State and check the assumptions for a hypothesis test. Write out anything you need to draw on paper for the question A researcher is testing the effect preschool has on the development of young children—are children who spend more time away from their mothers more or less likely to show developmental problems in kindergarten? Using a standardized scale, 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 had spent at least 20 hours per week in child care during the previous year produced the scores shown in the data. Test at 0.01 level of significance that children who spend more time away from their mothers are more likely to show developmental problems in kindergarten.Sample Scores:38, 39, 42, 43, 48, 44, 38, 36, 42, 37, 36, 47, 48, 38, 41

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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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At a nearby college, there is a school-sponsored website that matches people looking for roommates. According to the school's reports, 39% of students will find a match their first time using the site. A writer for the school newspaper tests this claim by choosing a random sample of 160 students who visited the site looking for a roommate. Of the students surveyed, 54 said they found a match their first time using the site. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.10 level of significance, to reject the claim that the proportion, p, of all students who will find a match their first time using the site is 39%. (a) State the null hypothesis H, and the alternative hypothesis H₁ that you would use for the test. Ho: H₁:0 р 0<0 0<0 □□ 0=0 (b) For your hypothesis test, you will use a Z-test. Find the values of np and n (1-p) to confirm that a Z-test can be used. (One standard is that np≥ 10 and (1-p) ≥10 under the assumption that the…
Solve 2 and 3
Subject : Statestic
The academic planner of a university thinks that at least 34% of the entire student body attends summer school. Which of the following is the correct set of hypotheses to test his bélle ? Ho:p 0.34 H:ps 0.34 Ho: P2 0.34 H:p 0.34
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You watch people exiting Dodgers stadium after a game and you write down the number of males and the number of females that exit the stadium past you during the 20 minutes that you spend watching. You assumed that there would be a perfectly equal number of males and females attending a Dodgers game, but you look at the number of males and females that you actually counted, and you see if you still think that is actually true. What kind of hypothesis test would allow you to do this? a. One-Factor, Independent-Measures ANOVA b. Two-Factor ANOVA c. Correlation/Regression d. Chi-Square Goodness of Fit
HYPOTHESIS TESTING 1. Formulate the null and the alternative Ho: hypotheses In symbol: Ho: μ = 50 Ha: The average weight of bag of chemical is not equal to 50 kilograms. In symbol: Ha: 2. Specify the following: A. Level of Significance A. B. Types of Hypothesis Testing [one-tailed test B. two tailed test (left-tailed or right-tailed) or a two-tailed test] 3. Specify the following: A. The test statistic to be used. (t-test: one sample mean or t-test: two sample means) A. B. Find the Degree of Freedom Formula: df = n-1 (for one-sample mean test) B. df = n -1 df = (n + n₂) - 2 (for two-sample mean test) df = 16-1 C. The critical or tabular value (t critical). (Can be found on the given table of Tabular Value of T) df = 15 C. 2.947 4. Compute for the value of the test statistic Formula: (t computed) using the data from the population (x-μ)√n t= and the sample/s. Given: хэ 48.1 μl - n-29 s-0.9 Substitute the given to the formula and solve:
Number 1
C and D
At a nearby college, there is a school-sponsored website that matches people looking for roommates. According to the school's reports, 42% of students will find a match their first time using the site. A writer for the school newspaper tests this claim by choosing a random sample of 170 students who visited the site looking for a roommate. Of the students surveyed, 86 said they found a match their first time using the site. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to reject the claim that the proportion, p, of all students who will find a match their first time using the site is 42%. (a) State the null hypothesis H, and the alternative hypothesis H, that you would use for the test. H₁: p=0.42 H₁: p = 0.42 020 0=0 ロッロロロ (b) For your hypothesis test, you will use a Z-test. Find the values of p and (1-p) to confirm that a Z-test can be used. (One standard is that np ≥ 10 and (1-p) ≥10 under the assumption…
Some of the statements below refer to the null hypothesis, some to the alternate hypothesis. State the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the appropriate parameter (μ or p). Private universities' mean tuition cost is more than $20,000 per year.

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