sment/showtest.php?action-skip&to-3- 0.05.You wish to test the following claim (Ha) at a significance level of aHo Pi P2Ha:Pi P2/1))481 from the first population. You obtain 54.9% successes in a284 from the second population. For this test, you should NOT use the continuity correction, andYou obtain 3% successes in a sample of size n1sample of size n2you should use the normal distribution as an approximation for the binomial distribution.What is the test statistic for this sample? (Report answer accurate to three decimal places.)test statistic = 0.509What is the p-value for this sample? (Report answer accurate to four decimal places.)8p-value = 0.610The p-value is..less than (or equal to) agreater than aThis test statistic leads to a decision to..reject the nullaccept the nullfail to reject the null

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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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10.3.15-T In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected 20 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x= 8.03 cm and s =0.8 cm°. Conduct the appropriate test at the a= 0.01 level of significance. Ho: = 9.02 H1:p < 9.02 (Type integers or decimals. Do not round.) Identify the t-statistic. to = - 5.53 (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.)
Do question 7,8 and 9 only The new study also carried out a test to determine whether the population proportion of unvaccinated school children contracting winter flu was higher than the population proportion of vaccinated school children. The Z test statistic to test this belief is found to be 1.874. The corresponding p-value is 0.0305 0.1212 0.3036 0.7724 Question 7 Suppose that the new study uses a level of significance of 0.05 to test the claim in Question 6. The probability of Type I error is 0.025 0.05 0.95 0.975 Question 8 Based on previous studies of school children who were vaccinated and contracted the flu, the time in hours that the flu symptoms last is assumed to follow a normal distribution with a mean of 20.7 hours and a standard deviation of 7.3 hours. The probability that a randomly selected school child has flu symptoms for more than 24 hours is 0.1628 0.3256 0.6744 0.8372 Question 9 Suppose that a random sample of 5 vaccinated school children is taken. Assuming the…
Question 3 Y Only about 12% of all people can wiggle their ears. Is this percent lower for millionaires? Of the 369 millionaires surveyed, 33 could wiggle their ears. What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer ✓ H₁: ? Select an answer (please enter a decimal) (Please enter a decimal) c. The test statistic?v= d. The p-value = e. The p-value is ? a f. Based on this, we should [Select an answer the null hypothesis. g. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 3 decimal places.) O The data suggest the population proportion is not significantly lower than 12% at a = 0.05, so there is statistically significant evidence to conclude that the population proportion of millionaires who can wiggle their ears is equal to 12%. The data suggest the population proportion is not significantly…
23:13 2月8日周一 +令 @70% A smschool.myschoolapp.com G not a simp - Google (79) 【Gmod 日常】逆风笑是我老大 M Student smschool.myschoolapp.com/ftpi.. Significance Testing Handout Name For each of the following scenarios, complete a thorough and complete test of significance. Be sure your write-ups include all of the following steps: 1. Define the parameter(s) of interest. 2. State in symbols and in words your null and alternative hypotheses. 3. Draw and label an appropriate diagram of the sampling distribution. 4. Check the technical conditions for this problem. Is your sampling distrubution valid? (For the sake of review, complete the problems regardless of whether or not the conditions hold!) 5. Determine the p-value for this application. 6. Explain what the p-value tells you about your sample result. Be sure to interpret this number as a probability. 7. State the results of your test keeping your comments within the context of the application. (This usually requires several sentences). 8. Have the…
collected data from 150 surveys ne nanaed out at a busy park located in the region. To continue the study into the drinking habits of adults, the researcher decides to collect data from adults working in "white collar" jobs to see whether their drinking habits are in the same proportion as the general public. The null hypothesis for this test is Ho: p = 0.26 and the alternative hypothesis is Ha: p<0.26. The researcher collected data from a random sample of 120 adults with "white collar" jobs of which 25 stated that they drank once a week or less in the last month. Assume that the conditions that must be met in order for us to use the N(0, 1) distribution as the sampling distribution are satisfied. Find the values of the sample proportion, p, the test statistic, and the p-value associated with the test statistic. Round all values to the nearest thousandth. P = 0.30, z = 0.803, p-value = 0.041 A P = 0.208, z = -1.290, p-value = 0.098 P = 0.75, z = -1.32, p-value = 0.599 P = 0.208, z =…
Is the following results section correct? A single sample t test was conducted to measure the affect of a drug on short-term memory in 8 randomly selected participants. Each participant was given the drug, and then told to memorize a list of 10 words. After 15 minutes, they were tested for retention. The result was statistically significant, t (7) = 4.32, p = .003, two-tailed., 95% CI [6.9054, 9.0946]. The words remembered in the task (M = 8.00, SD = 1.30) differed significantly from the population (m = 6) with a large effect size, d = 1.31. A) Is it correct in APA style? B) Is it correct as per the outputs shown on SPSS?
A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population was such that 19% were under 20 years old, 14% were in the 20- to 35-year-old bracket, 33% were between 36 and 50, 23% were between 51 and 65, and 11% were over 65. A study done this year used a random sample of 210 residents. This sample is given below. At the 0.01 level of significance, has the age distribution of the population of Blue Valley changed?Under 20 20 - 35 36 - 50 51 - 65 Over 6529 27 67 65 22(i) Give the value of the level of significance. State the null and alternate hypotheses.H0: The population 10 years ago and the population today are independent.H1: The population 10 years ago and the population today are not independent.H0: The distributions for the population 10 years ago and the population today are the same.H1: The distributions for the population 10 years ago and the population today are different. H0: Time ten years ago and today are independent.H1: Time ten years…
Question 1. Greater than or Less than. Question 2. IS or IS NOT.
Answer question 7 and 8
Several students were tested for reaction times (in thousandths of a second) using their right and left hands. (Each value is the elapsed time between the release of a strip of paper and the instant that it is caught by the subject.) Results from five of the students are included in the graph to the right. Use a 0.20 significance level to test the claim that there is no difference between the reaction times of the right and left hands. 220- 170- 120+ 100 Click the icon to view the reaction time data table. 150 200 Right Hand What are the hypotheses for this test? Let µa be the of the right and left hand reaction times. Ho: Hd H1: Hd Reaction Time Data Table Right Hand Left Hand 113 138 121 132 141 157 173 187 197 211 Print Done Left Hand
Find C.
According to the Bureau of Transportation Statistics, on-time performance by airlines is described as follows: Action % of time On Time National Aviation System Delay Aircraft arriving late 71 9. 10 Other (weather and other conditions) 10 When a study was conducted it was found that of the 211 randomly selected flights, 150 were on time, 19 were a National Aviation System Delay, 21 arriving late , 21 were due to weather. Perform a test to see if there is sufficient evidence at a = 0.10 to see if these differ from the governments statistics. The correct hypotheses are: O Ho: The sample is a good fit to the Bureau of Transportation Statistics. HA: The sample is not a good fit to the Bureau of Transportation Statistics. (claim) O Ho: The sample is not a good fit to the Bureau of Transportation Statistics. HA: The sample is a good fit to the Bureau of Transportation Statistics. (claim) O Ho: The sample and the Bureau of Transportation Statistics are independent. HA: The sample and the…

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