A psychologist is interested in constructing a 95% confidence interval for the proportion ofpeople who accept the theory that a person's spirit is no more than the complicated network ofneurons in the brain. 72 of the 817 randomly selected people who were surveyed agreed withthis theory. Round answers to 4 decimal places where possible.a. With 95% confidence the proportion of all people who accept the theory that a person's spiritis no more than the complicated network of neurons in the brain is betweenandb. If many groups of 817 randomly selected people are surveyed, then a different confidenceinterval would be produced from each group. Aboutpercent of these confidenceintervals will contain the true population proportion of all people who accept the theory that aperson's spirit is no more than the complicated network of neurons in the brain and aboutpercent will not contain the true population proportion.Hint: Hinte

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Answered: an the complicated network of neurons…

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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ttps://ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/act smework: Chapter 8 (Sections 8.4 through 8.6) 6 Saved A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean is = 820 and the sample standard deviation is s= 25. Use Appendix D to find the values of Student's t (a) Construct an interval estimate of u with 99% confidence. (Round your answers to 3 decimal places.) The 99% confidence interval is from to (b) Construct an interval estimate of u with 99% confidence, assuming that s = 50. (Round your answers to 3 decimal places.) eBook The 99% confidence interval is from to (c) Construct an interval estimate of u with 99% confidence, assuming thats= 100. (Round your answers to 3 decimal places.) Ask The 99% confidence interval is from to Print (d) Describe how the confidence interval changes as s increases. The interval stays the same as s increases.…
Although a research study is typically conducted with a relatively small group of participants known as a most researchers hope to generalize their results to a much larger group known as a
2. When she was 9 years old, Emily Rosa did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, then she asked the therapists to identify the selected hand by placing their hand just under Emily's hand without seeing it and touching it. Among the 280 trials, therapists were correct 123 times. Do the data provide sufficient evidence to indicate that touch therapists are effective? Test at the 1% level with both the critical value and p-value methods.
Your daughter is doing a case study with my husband to know which devices are used by the students in their online classes. As such, a survey was conducted to 100 engineering students at PUP. 54 of them use smartphone, 37 use laptop and 24 of the respondents use iPad. 21 of them use both smartphone and laptop. 13 of them use both iPad and smartphone. In addition to that, 18 of them use both iPad and laptop. Only 9 of the respondents use all the three devices in their online class. Those who do not have any devices are studying through modular approach. How many respondents are modular?
A research study was conducted about gender differences in 'sexting'. The researcher believed that the proportion of girls involved in 'sexting' is different from the proportion of boys involved. The data collected in the spring of among a random sample of middle and high school students in a large school district in is summarized next: out of 380 females 43 sent 'sexts' and out of 410 males 64 sent 'sexts'. Is the proportion of girls sending sexts different from the proportion of boys 'sexting'? Choose the appropriate procedure. Procedure: Assumptions: (select everything that applies) Population standard deviations are known Normal populations Sample sizes are both greater than 30 Population standard deviation are unknown but assumed equal Paired samples Population standard deviation are unknown Simple random samples The number of positive and negative responses are both greater than 10 for both samples Independent samples
A doctor is studying the relationship between blood pressure and heartbeat abnormalities in her patients. She tests a random sample of her patients and notes their blood pressures (high, low, or normal) and their heartbeats (regular or irregular). She finds that: 14% have high blood pressure. • 22% have low blood pressure. 15% have an irregular heartbeat. • Of those with an irregular heartbeat, one-third have high blood pressure. • Of those with normal blood pressure, one-eighth have an irregular heartbeat. What portion of the patients selected have a regular heartbeat and low blood pressure? (0.2)
I am going to run a statistical test in SPSS for N=20 particants who filled out a survey. I have 4 variable that I believe are the indepedent variables and they are 3 different religions chosen and a 4th that is "none" in case they don't have one. I then have 6 dependent variables being questions asking the strength of how religion affects their life, rated on a scale of 1-10 depending on strength. Am I right that my independent variable is type of religion and dependent variables are the 6 questions of strength of belief? Would the type of religion be a nominal variable and the dependent variable (the rated questions) be a within groups ordinal variable? I didn't think it would be scale? Once I get those answers I think I would know what test to do in SPSS. If you have a thought on that too (ie Kruskal Walis), I do appreciate it. Otherwise, just know about the status of the variables would be a great help. Thanks!
A recent study revealed that the average weight of babies born in the United States is normally distributed with a mean of 7.5 pounds. This number is lower than recent years and so researchers are interested in determining what factors are associated with lower birth weights. One researcher decides to look at the age of the mother to determine if younger mothers have babies that are significantly heavier or lighter than average. To study this the researcher collects data from 87 babies who were born to mothers between the ages of 16 and 18. Only one baby was measured per mother. Twins and other multiple births were excluded. The average weight for these babies was 7.3 pounds with a standard deviation of .6 pounds. Was the average weight of babies of young mothers significantly different than babies in the general population? No, the difference was not significant Yes, they were lighter. Yes, they were heavier
7. A new drug study was conducted by a drug company. In the study, 10 people were chosen at random to take Vitamin X for 3 months and then have their cholesterol levels checked. In addition, 10 different people were randomly chosen to take Vitamin Y for 3 months and then have their cholesterol levels checked. All 20 people had cholesterol levels between 8 and 10 before taking one of the vitamins. The drug company wanted to see which of the 2 vitamins had the greatest impact on lowering people's cholesterol. The following data was collected: Vitamin X 7.27.5 5.2 6.5 7.7 10 6.47.6 7.77.8 Vitamin Y 4.8 4.44.5 5.1 6.5 8.03.1 4.6 5.2 6.1 (a) Draw a box-and-whisker plot for both sets of data on the same number line. (b) Use the double box-and-whisker plots to compare the 2 vitamins and provide a conclusion for the drug company. (e) State the skewness of both distributions and justify your answer.
According to the National Health and Nutrition Examination Survey (NHANES) sponsored by the U.S. government, a random sample of 712 males between 20 and 29 years of age and a random sample of 1,001 males over the age of 75 were chosen and the weight of each of the males were recorded (in kg). Do the data provide evidence that the younger male population weighs more (on average) than the older male population? Use “Y” for ages 20-29 and “S” for ages 75+. It was found that x̅Y=83.4, sY=18.7, x̅S=78.5, and sS=19.0. a)Suppose the test statistic is t = 2.398. What is the associated p-value? Group of answer choices 0.001 < p-value < 0.002 0.005 < p-value < 0.01 0.01 < p-value < 0.02 0.0005 < p-value < 0.001 b) Suppose the p-value is 0.02 < p-value < 0.04. At α = 0.10 what is the appropriate conclusion to make? Group of answer choices Fail to reject H0 and conclude that the mean weight of all males ages 20-29 is greater than the mean weight of all…
A population consists of four numbers 3, 4, 2, 5. Consider ail possible distinct samples (without replacement) of size two and verify that the population mean is equal to the mean of the sample means.
A candy maker offers Child and Adult bags of jelly beans with different color mixes. The company claims that the Child mix has 30% red jelly beans, while the Adult mix contains 15% red jelly beans. Assume that the candy maker’s claim is true. Suppose we take a random sample of 50 jelly beans from the Child mixand a separate random sample of 100 jelly beans from the Adult mix. Let ?^ and ?^ be the sample ??proportions of red jelly beans from the Child and Adult mixes, respectively.a. What is the shape of the sampling distribution of ?^ − ?^ ? Why???b. Find the mean of the sampling distribution. Show your work.c. Find the standard deviation of the sampling distribution. Show your work.

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