10. Researchers studying the acquisition of pronunciation often compare measurements made onthe recorded speech of adults and children. One variable of interest is called "voice onset time"(VOT), the length of time between the release of a consonant sound (such as "p") and thebeginning of an immediately following vowel (such as the "a" in "pat"). For speakers ofEnglish, this short time lag can be heard as a period of breathiness between the consonant andthe vowel.Here are the results for some randomly-selected 4-year-old children and adults asked topronounce the word "pat." VOT is measured in milliseconds and can be either positive ornegative.ChildrenAdultsnx1060.67 39.8920 88.17 24.74You are interested in whether there is a difference in the VOT of adults and children, so youplan to test Ho: M₁-M 0 against H₁M-μ0, where and are the populationmean VOT for adults and children, respectively.(a) What additional information would you need to confirm that the conditions for this testhave been met?(b) Assuming the conditions have been met, calculate the test statistic and P-value for this test.(c) Interpret the P-value in the context of this study, and draw the appropriate conclusion at thea = 0.05 level.(d) Given your conclusion in part (c), which type of error, Type I or Type II, is it possible tomake? Describe that error in the context of this study.

Answered: Image /qna-images/answer/3b18dfb1-7a60-4f38-acb0-cf9bdd2e4c05.jpg

Answered: recorded speech of adults and children.…

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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In 1974, Loftus and Palmer conducted a classic study demonstrating how the language used to ask a question can influence eyewitness memory. In the study, college students watched a film of an automobile accident and then were asked questions about what they saw. One group was asked, “About how fast were the cars going when they smashed into each other?” Another group was asked the same question except the verb was changed to “hit” instead of “smashed into.” The “smashed into” the group reported significantly higher estimates of speed than the “hit” group. Suppose a researcher repeats this study with a sample of today’s college students and obtains the following results. Estimated SpeedSmashed Into Hitn = 16 n = 16M = 40.8 M = 34.0SS = 510 SS = 414 For this problem, complete the four stages of hypothesis testing to determine whether the assumption of homogeneity of variance is met. (Note: This problem is NOT asking you to conduct an independent-samples t-test.) Use a nondirectional…
In 1974, Loftus and Palmer conducted a classic study demonstrating how the language used to ask a question can influence eyewitness memory. In the study, college students watched a film of an automobile accident and then were asked questions about what they saw. One group was asked, “About how fast were the cars going when they smashed into each other?” Another group was asked the same question except the verb was changed to “hit” instead of “smashed into.” The “smashed into” group reported significantly higher estimates of speed than the “hit” group. Suppose a researcher repeats this study with a sample of today’s college students and obtains the following results: Estimated Speed Smashed into Hit n=15M=40.8SS=510 n=15M=34.9SS=414 Use an independent-measures t test with α=.05 to determine whether there is a significant difference between the two conditions and compute r2 to measure effect size. Now, increase the variability by doubling the two SS values to…
An SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores? Let d = (verbal SAT scores prior to taking the prep course)-(verbal SAT scores after taking the prep course). Use a significance level of α = 0.05 for the test. Assume that the verbal SAT scores are normally distributed for the population of students both before and after taking the SAT prep course. Student 1 2 3 4 567 Score on first SAT 380 440 470 490 440 Score on second SAT 420 530 530 550 460 420 410 490 430 Step 1 of 5: State the null and alternative hypotheses for the test. Answer 0 Ho: Md 0 Ha IVA A VI Copy Data Tables Keypad Keyboard Shortcuts
An SAT prep course claims to improve the test score of students. The table below shows the scores for seven students the first two times they took the verbal SAT. Before taking the SAT for the second time, each student took a course to try to improve his or her verbal SAT scores. Do these results support the claim that the SAT prep course improves the students' verbal SAT scores? Let d = (verbal SAT scores prior to taking the prep course)-(verbal SAT scores after taking the prep course). Use a significance level of a = 0.01 for the test. Assume that the verbal SAT scores are normally distributed for the population of students both before and after taking the SAT prep course. 1 234567 520 570 540 380 370 490 450 Student Score on first SAT Score on second SAT 540 600 610 470 410 510 480 Step 1 of 5: State the null and alternative hypotheses for the test. Answer 0 Ho: Md 0 Ha Ma IA IV V A || < = Copy Data Tables Keypad Keyboard Shortcuts
If the mode of the scores 10, 12, 13, 15, 15, 13, 12, 10, x is 15, then what is the value of x? (a) 10 (c) 13 Δ о (b) 12 (d) 15 ㅁ J
9
Dr.Blume has trained observers to use frequency recording to record the behavior of 12 schizophrenic clients. According to the analysis of the data κ = 0 . 47, do you think the observers are sufficiently trained to allow Dr. Blume to proceed with the research?
When we examine a proposed experimental study for possible confounds, which of these should look for? Confounds due to the age of the participants the order in which the conditions of the study were tested the size of the sample whether the study has ever been carried out before and published (a and b), but not (c and d)
The two-way frequency table below shows the current inventory of lumbar in a lumberyard. Suppose a board is selected at random. Find P(maple or cherry)
in a math class , studenys are given task of the collection of data on the age of custo,ers for a clothimg establishment of thier choosing George randmly selects days and times to gather data at the store on the stanford campus Mary randomly selrctd days and times to gather data a the in - n -out near the stanford campus out of the 2 , which studets data will have smallrer standard devaition .kindly explain why hint -ur answer must hint to what charcyeristics of data will lead to smaller st devaition

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