Can vaccination be regarded as a preventive measure for small pox from the data given below ? 'Of 1482 persons in a locality exposed to small box 368 in all were attacked'. 'Of 1482 persons , 343 has bean vaccinated and of these only 35 were attacked'.
Q: Assume that 40% of students at SCC receive A or B’s, 35% receive C’s, and 25% receive D or F’s. A…
A: The following information has been provided: Categories Observed Value A 100 B 130 C 70…
Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…
A:
Q: Is the proportion of wildfires caused by humans in the south lower than the proportion of wildfires…
A: As per our guidelines we are supposed to answer only 3 sub-parts of any questions so i am solving…
Q: Eight middle aged women participated in a study of exercise and health. Each woman’s resting pulse…
A: Given: woman’s resting pulse rate (bpm) before and after a two-week program of regular exercise. n=8…
Q: What statistical test would you use to compare three different groups on some dependent variable?
A: Given : What statistical test would you use to compare three different groups on some dependent…
Q: A researcher wanted to examine the effect of a new math study skills program on second graders.…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: People with z-scores greater than 2.5 on an IQ test are considred as geniuses. If IQ tests have a…
A: given data, μ=100σ=16z- scores greater than 2.5 on an IQ test are considred as geniuses.cutoff…
Q: Suppose a hypertension trial is mounted and 18 participants are randomly assigned to one of the…
A: Given: N=18 α=0.05 One-way ANOVA will be used here: Set Hypothesis: H0: There is no difference in…
Q: Researchers at a local public health office are interested in the difference in prevalence of sickle…
A: Given information- We have given the data that represents prevalence of sickle cell anemia reported…
Q: Find the relative risk for the headache data.
A: here use given information , For treatment group n = 2142 x= 22 (reported headache) for control…
Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…
A: a. Denote p1, p2 as the true population proportions of wildfires caused by human in south and west,…
Q: Suppose a statistics teacher wants to evaluate whether her students who received online lectures did…
A: The objective of the question is to critique the use of a two-sample z test in a situation where the…
Q: A study of the relationship between blood pressure and cholesterol level showed the following…
A: Let A = have high cholesterol B = Have high blood pressure Give that, we can write as…
Q: The average one-ounce chocolate chip cookie contains 128 calories. A random sample of different…
A:
Q: A researcher wants to investigate whether mood is related to chocolate consumption. She recruits a…
A: Claim : The mood is related to chocolate consumption we have to use Chi-square test of independence…
Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…
A: GivenFor wildfires looked at in the southn1=567x1=452p1^=x1n2=452567≅0.7972For wildfires looked at…
Q: 1. For this problem, treat the data in the Pre-Module and Post-Module scores as independent samples.…
A: Given: The data in pre-module and Post module scores are independent samples. Sample size of both…
Q: A researcher wants to see if there is a difference in APGAR scores of newborns depending on whether…
A: It is needed to test, whether there is a difference in APGAR scores of newborns depending on whether…
Q: A study was conducted to determine the proportion of people who dream in black and white instead of…
A: The given hypothesis is H0:p1=p2 versus H1:p1>p2.
Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…
A:
Q: The authors of a paper concluded that more boys than girls listen to music at high volumes. This…
A:
Q: A statistician wants to determine if there is a difference in the fuel efficiency of cars between…
A: Given info: The claim of the test is there is a difference in the fuel efficiency of cars between…
Q: Suppose 250 subjects are treated with a drug that is used to treat pain and 50 of them developed…
A: given data clim : p > 0.20n = 250x = 50α = 0.05p^ = xn = 50250 = 0.20
Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…
A: n1=590,x1=386,n2=538,x2=363
Q: An ANOVA procedure is used for data obtained from four populations. Four samples, each comprised of…
A:
Q: Close Confidants and Social Networking Sites A study1 has been conducted in which 2006 randomly…
A: Given Sample size =n1=947 Sample size =n2=1059 X1bar=2.5 X2bar=1.9 Sample standard deviation s1=1.4…
Q: Social networking is becoming more and more popular around the world. Pew Research Center used a…
A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of adults using social networking…
Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…
A: Let us consider the two samples which are independent. Let the observation in each samples are taken…
Q: A study seeks to estimate the difference in the mean fuel economy (measured in miles per gallon) for…
A: The 90% confidence interval for the true difference in the mean fuel economy for cars is -3.339 mpg…
Q: An article claimed that "those with a college degree reported a higher incidence of sunburn than…
A:
Q: A researcher computed a 3 x 3 mixed ANOVA. How many independent variables did the researcher have?…
A:
Q: An article published in the “American Journal of Public Health” describes the results of a health…
A: No. of 50 years of age or older male convicts in the administered health survey, The sample…
Q: Miss America winners from the 1920's and 1930's had a average BMI of 19.4. A sample of recent…
A: Given data Miss America winners from 1920's and 1930's had an average BMI of 19.4 The reported BMI…
Q: researcher hypothesizes that the regions in the US feel differently about Hip Hop Music. To test…
A: Applying ANOVA test for a single factor, Given, SS(between) = 76.1335 SS(within) = 100.71 SS(Total)…
Q: 4. Data were collected from a pretest and posttest of students taking a two-week course in substance…
A: The given data is as follows: PretestPosttest8490857570896591718572798488858566826799
Step by step
Solved in 2 steps with 2 images
- A substance abuse counselor wants to demonstrate the effect of situational stress on alcohol cravings. He recruits two groups of men who are similar in respect to history of alcohol use and demographic variables. He divides them in to two groups. In one group(n=11), the men are exposed to a stressful situation and then asked to complete a measure rating their alcohol cravings on a scale from 0-10, where 0 representsno cravings and 10 represents intense cravings. In the second group (n=10), the men are exposed to a neutral situation and asked to complete the same measure. What test and graph should I create to find out if a stressful situation result in more intense alcohol cravings than a non-stressful situation?Two popular brands of tires for tractor-trailers are the Puma and the Eternal. Salma is a buyer for a major shipping company and wants to determine if there is any difference between the two brands of tire in the mean distance (in thousands of km) driven on them before they need to be replaced. In the company's testing lab, Salma tests a random sample of 14 Puma tires and a random sample of 15 Eternal tires. (These samples are chosen independently.) For the Puma tires, the sample mean distance (in thousands of km) until they would need to be replaced is 54.71 with a sample variance of 5.95. For the Eternal tires, the sample mean distance (in km) until they would need to be replaced is 50.21 with a sample variance of 37.75. Assume that the two populations of distances driven are approximately normally distributed. Can Salma conclude, at the 0.05 level of significance, that there is a difference between the population mean of the distances (in thousands of km) driven on Puma tires before…Is the proportion of wildfires caused by humans in the south different from the proportion of wildfires caused by humans in the west? 372 of the 563 randomly selected wildfires looked at in the south were caused by humans while 372 of the 521 randomly selected wildfires looked at the west were caused by humans. 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 answerv Select an answerv Select an answerv (please enter a decimal) H: Select an answerv Select an answerv Select an answerv (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 4 decimal places.) e. The p-value is ? a f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that ... O The results are statistically insignificant conclude that the population proportion from the…
- st is 22. Oishi and Shigehiro (2010) report that people who move from home to home frequently as children tend to have lower than average levels of well-being as adults. To further examine this relationship, a psychologist obtains a sample of n = 12 young adults who each experienced 5 or more different homes before they were 16 years old. These participants were given a standardized well-being questionnaire for which the general population has aA study was conducted to determine the proportion of people who dream in black and white instead of color. Among 318 people over the age of 55, 77 dream in black and white, and among 298 people under the age of 25, 16 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. H4: P1 P2 H: P1 #P2 O D. Ho: P1 SP2 H1: P1#P2 O E. Ho: P1 P2 H1: P1 = P2 O F. Ho: P1 =P2 H1: P1 #P2 Identify the test statistic. z= 6.52 (Round to two decimal places as needed.) Identify the P-value. P-value = 0.000 (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is less than the significance level of a = 0.05, so reject the null hypothesis. There is sufficient evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion…Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 380 of the 581 randomly selected wildfires looked at in the south were caused by humans while 318 of the 503 randomly selected wildfires looked at the west were caused by humans. 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: Ho: Select an answer v Select an answer Select an answer v (please enter a decimal) Hj: Select an answer Select an answer vSelect 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 4 decimal places.) e. The p-value is ? a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... |the null hypothesis. O The results are statistically significant at a = 0.10, so there is sufficient evidence to…
- Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 348 of the 574 randomly selected wildfires looked at in the south were caused by humans while 272 of the 518 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the = 0.01 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 Select an answer Select an answer (please enter a decimal) H₁: Select an answer Select an answer Select an answer (Please enter a decimal) = c. The test statistic ? ◊ your answer to 3 decimal places.) (please showThe National Cancer Institute conducted a 2-year study to determine whether cancer death rates for areas near nuclear power plants are higher than for areas without nuclear facilities. A spokesperson for the Cancer Institute said, "From the data at hand, there was no convincing evidence of any increased risk of death from any of the cancers surveyed due to living near nuclear facilities." Let p denote the proportion of the population in areas near nuclear power plants who die of cancer during a given year. The researchers at the Cancer Institute have considered the null and alternative hypotheses below: А. Họ: p = value for areas without nuclear facilities Hạ: p> value for areas without nuclear facilities According to the spokesperson's statement, what is the conclusion of the National Cancer Institute? Select one of the following: Reject Ho Fail to reject Ho Reject Ha Fail to reject HaWhich of these experimental designs has the most statistical power (is more likely to show a true difference between 2 treatment conditions)? A. Between-Subjects B. Descriptive Study C. Correlational Study D. Within-Subjects
- A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 295 people over the age of 55, 64 dream in black and white, and among 312 people under the age of 25, 13 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and alternative hypotheses for the hypothesis test? O A. Ho: P₁ = P₂ H₁: P₁ P2 O B. Ho: P₁ P₂ H₁: P₁ = P2 O E. Ho: P₁ SP₂ H₁: P₁ P2 OC. Ho: P₁ P2 H₁: P₁ P2 OF. Ho: P₁ H₁: P₁ P₂ P2A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 294 people over the age of 55, 63 dream in black and white, and among 300 people under the age of 25, 19 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of people over the age of 55 and the second sample to be the sample of people under the age of 25. What are the null and alternative hypotheses for the hypothesis test? A. Ho: P₁ = P2 H₁: P₁ P2 D. Ho: P₁ P2 H₁: P₁ P2 OB. Ho: P1 P2 H₁: P₁ P2 O E. Ho: P1 H₁: P₁ P2 P2 O C. Ho: P₁ P2 H₁: P₁ = P2 OF. Ho: P₁ P2 H₁: P₁ P2An article published in the “American Journal of Public Health” describes the results of a health survey administered to 119 male convicts, 50 years of age or older, residing in a state social rehabilitation center. It was found that 21.6% of them claimed to have a history of venereal diseases. Based on these findings, we wish to evaluate whether more than 15% of this population has a history of venereal diseases. What would be the p value that allows evaluating the research question? A. 4.32 B. 2.09 C. -1.72 D. 0.018 E. 0.957
