.. A certain drug is claimed to be effective in curing cold. In an experiment on were given the 500 persons with cold, half of them were given the drug and half of them sugar pills. The patients' reactions to the treatment are recorded in the following table: Helped Harmed No effect Total 30 70 250 Drug Sugar pills 150 130 40 80 250 Total 280 70 150 500 On the basis of the data can it be concluded that there is a significant difference in the effect of the drug and sugar pills ?
Q: For this question: The price drivers pay for gasoline often varies a great deal across regions…
A: Given: The number of observations are N=33. The provided data is: Metropolitan area Shell BP…
Q: A food-frequency questionnaire is used to measure dietary intake. The respondent specifies the…
A: Blood pressureDietary Cholestrol High LowTotalHigh15991250Low78172250Total237263500
Q: he following data was collected from a clinical trial testing a new drug aimed to lower blood…
A: We have to calculate the mean and standard deviation for the data given above
Q: The table below summarizes data from a survey of a sample of women. Using a 0.01significance level,…
A: Here it is needed to test, whether the proportions of agree/disagree responses are the same for…
Q: 4h. The National Football League (NFL) records a variety of performance data for individuals and…
A: The question is about regression Given : c ) estimated regression eq. e ) pred. % of games won by…
Q: A researcher wants to know whether the acidity of rain (pH) near Houston, Texas, is significantly…
A: In order to determine whether there is significant difference in the pH of rain in Chicago and…
Q: -0.307 -0.294 0.079 0.019 -0.136 -0.324 -0.176 0.125 -0.013 0.082 0.091 0.318 0.459 0.154 0.137…
A: *Answer: . Yes there is an evidence to indicates that mean in pH readings for the four devices are…
Q: A study surveys students to determine the amount of Facebook use during the time they are doing Math…
A: The null hypothesis assumes that the math scores for all three types of users- Non-User, Rarely-Use,…
Q: 3. A researcher was interested in the effects of a drug on depression. Subjects were randomly…
A:
Q: After completing the experiment, Kendall wants to see if the difference between the averages for the…
A:
Q: Dr. Ngo would like to know whether there is a relationship between the number of minutes per day…
A: The data are given, sample size = n = 10 Here we conduct correlation test, The null and alternative…
Q: A new over-the-counter medicine to treat a sore throat is to be tested for effectiveness. The makers…
A: The objective of this question is to determine whether there is a significant difference in the mean…
Q: A new drug for pain relief is being tested within a given palliative care population. The new drug…
A: Null and alternative hypothesis: Given data represents the pain ratings reported by the patients…
Q: A company that produces a certain medicine claims that less than 0.1% of the people who take the…
A: as in question it is not giving that claimes ratio increases or decreasea after changing. so,I am…
Q: Car Window Skin Cancer? A study suggests that exposure to UV rays through the car window may…
A:
Q: Professor Wonka is interested in whether candy influences children's mood. One group of children is…
A: The formula for effect size is obtained as given below: Effect…
Q: A study surveys students to determine the amount of Facebook use during the time they are doing Math…
A: Alternative Hypothesis: At least one of the groups is statistically different
Q: Is there a relationship between autism and what an infant is fed? To determine if there is, a…
A: Solution: The claim is to test if the data provide enough evidence to show that that what an infant…
Q: Do certain car colors attract the attention of the police more than others, so that they are more…
A: The observed frequencies are 16, 33, 39 and 32.
Q: Do larger universities tend to have more property crime? University crime statistics are affected by…
A: Given data is x 11.1 30.0 24.5 14.3 7.5 27.7 16.2 20.1 y 22 69 39 23 15 30 15 25
Q: A researcher wants to know whether the acidity of rain (pH) near Houston, Texas, is significantly…
A:
Q: A businesswoman is considering whether to open a coffee shop in a local shopping center. Before…
A: Point Estimate of the Population MeanA point estimate of a population parameter (in this case, the…
Q: Slept less than 8hrs 235 Slept 8hrs or more Failed the exam Passed the exam 180 190 203 a) Find the…
A:
Q: Do larger universities tend to have more property crime? University crime statistics are affected by…
A:
Q: A paper investigated the driving behavior of teenagers by observing their vehicles as they left a…
A: MaleDriver FemaleDriver 1.4 -0.2 1.2 0.5 0.9 1.1 2.1 0.7 0.7 1.1 1.3 1.2 3 0.1 1.3…
Q: A psychologist is examining the influence of an older sibling in the development of social skills. A…
A:
Q: A small study (n=10) is designed to assess if there is an association between smoking in pregnancy…
A: Given data of birth weights of babies born to mothers who reported smoking in pregnancy and those…
Q: 5. Imagine we collect data from 132 people. Each person writes two tests (test 1, correlation…
A: question:
Q: The following data are from an experiment comparing illness symptoms for 3 treatment conditions with…
A: The question is about ANOVA Given : No. of treatment groups ( k ) = 3 No. of samples in each grp =…
Q: The following data are from an experiment on carnations. The explanatory variable is the amount of…
A: Let X: the amount of bromine and Y: the average number of flowers per carnationTotal observations,
Q: Dr. Guidry conducts a study examining the relationship between the number of friends one has and the…
A: A study reported in the Journal of Small Business Management concluded that self- employed…
Q: Suppose you are comparing the time to relief of three headache medicines -- brands 1, 2, and 3. The…
A: Given Data : Brand 1 Brand 2 Brand 3 24.5 28.4 26.1 23.5 34.2 28.3 26.4 29.5 24.3…
Q: (b) Use a calculator to verify that Ex = 154.0, Ex? = 3357.62, Ey = 241, Ey? = 9501 and Exy =…
A: Given :∑x=154.0∑x2=3357.62∑y=241∑y2=9501∑xy=5365.4n=8The formula for r is…
Q: A researcher is interested in examining whether people experience greater traumatic stress after a…
A: In this case, the independent t test is obtained using T1-84 calculator. The hypothesis of interest…
Q: Seattle Grace Medical Center. As part of a long-term study of individuals 65 years of age or older,…
A: Given the sample data A and B as Sample A Texas Washington South Carolina 7 9 3 5 4 3 6 12…
Step by step
Solved in 3 steps with 3 images
- Suppose we are interested in comparing the proportion of male students who smoke to the proportion of female students who smoke. We have a random sample of 150 students (60 males and 90 females) that includes two variables: Smoke = "yes" or "no" and Gender = "female (F)" or "male (M)". The two-way table below summarizes the results. Smoke = Yes Smoke = No Sample Size 60 90 Gender = M Gender = F Reference: 3-15-No Tech 9 9 51 81 Describe how to use the data to construct a bootstrap distribution. What value should be recorded for each of the bootstrap samples.A health educator wants to evaluate the effect of a dental film on the frequency with which children brush their teeth. A random selection of 8 children is used for the experiment. First, a baseline of the number of times the children brush their teeth over a month’s period is established. Next, the children are shown the dental film and again the number of teeth brushings are recorded for a month. The following data are recorded: Subject 1 2 3 4 5 6 7 8 After Film 28 29 25 30 25 27 28 24 Baseline 25 28 22 30 26 24 25 22 What is the nondirectional alternative hypothesis? df = ∑ D2 = __ Dobt = µD = SSD =A food-frequency questionnaire is used to measure dietary intake. The respondent specifies the number of servings of various food items they consumed over the previous week. The dietary cholesterol is then quantified for each respondent. The researchers were interested in assessing if there was an association between dietary cholesterol intake and high blood pressure. In a large sample of individuals who had completed the questionnaire, 250 persons with a high dietary cholesterol intake (greater than 300 mg /day) were selected and 250 persons with a low dietary cholesterol intake (less than 300 mg/day) were selected. The 500 selected participants had their medical history taken and were classified as having normal or high blood pressure. The data are given here. Dietary Cholesterol Blood Pressure Total High Low High 159 91 250 Low 78 172 250 Total 237 263 500 Test 2: two-tailed test for comparing two independent proportions Clearly state…
- A researcher wanted to know if there was a correlation between the number of times a boxer incurred head injuries (traumatic encephalopathy) to depression scores reported by the same individuals. The data for 10 boxers (number of injuries and depression scores from 0-10 where 0 means no depression) is as follows: Number of brain injury Depression Score 0 1 9 10 4 7 7 8 2 1 1 0 8 10 5 5 0 2 4 6 a. Use the four steps of hypothesis testing and calculate a Pearson correlation for the above data, starting with the hypotheses.b. Find critical value at an alpha level at α=.05, two tailed.c. Include the coefficient of determination with a sentence explaining the outcome of both calculations in APA format.d. Create a scatter plot by hand of the above data set.. Do patients with gastrointestinal issues experience more psychological distress than the general population? The DASS-21 questionnaire is a validated measure of depression, anxiety, and stress. For the general population, the mean for anxiety is µ = 4.2. Anxiety levels are calculated based on self-reported answers to questions on a scale from 0 through 42, with lower scores indicating lower anxiety. Participants with gastrointestinal issues (specifically inflammatory bowel disease, IBD) completed the DASS-21. Use the data presented below to determine whether having gastrointestinal issues like IBD significantly increases risk for anxiety. Test whether or not the performance of this sample is significantly higher than the normal population using the proper t-test. Here are the data: Anxiety scores: 12, 15, 10, 8, 10, 5, 10, 13, 4, 6 ANALYSES AND UNGRADED OPTIONAL GUIDING QUESTIONS: 1a. Identify the Indep.Variable:__ Dep.Variable:__ Is it the Hypothesis…You are interested in investigating the efficacy of a new pain medication and design an experiment measuring pain levels before and after the administration of a new medication. You recruit 9 people to participate in your study and bring the same 9 participants in for two separate sessions. Here is the raw data: Pair Number Placebo Pain Score Pain Medication Pain Score 1 2 4 5 6 7 8 9 5 7 10 5 8 7 8 6 8 QUESTION 20 5 5 8 4 4 3 5 3 2 Use the t-test handout printout provided to calculate the t- statistic. What is the t-test statistic value? Round to the nearest tenth. What conclusion would you make on the above data, based on the t-value you calculated and the critical value of t? O You accept the null hypothesis because the t-value you calculated is inside the bounds of the critical t-value O You reject the null hypothesis because the t-value you calculated is inside the bounds of the critical t-value O You reject the null hypothesis because the t-value you calculated is outside the…
- A businesswoman is considering whether to open a coffee shop in a local shopping center. Before making this decision, she wants to know how much money people spend per week at coffee shops in that area. She took a random sample of 26 customers from the area who visit coffee shops and asked them to record the amount of money (in dollars) they would spend during the next week at coffee shops. At the end of the week, she obtained the following data (in dollars) from these 26 customers: 16.63 38.63 15.14 14.47 5.01 63.64 10.19 13.28 32.25 36.00 16.19 65.91 10.28 37.14 3.22 6.92 34.65 6.40 36.35 27.59 38.67 13.18 9.80 9.48 1.21 5.19 Assume that the distribution of weekly expenditures at coffee shops by all customers who visit coffee shops in this area is approximately normal. Round your answers to cents.a. What is the point estimate of the corresponding population mean?x¯=$b. Make a 99% confidence interval for the average amount of money spent per week at coffee shops by all…A researcher hypothesizes that different colors of cars result in different average speeds. To test this claim, she took a random sample of 20 people who own 4 different colors of colors of cars (n = 20, N = 80, G = 4), and she then tracks their average speed on the highway for a week of driving. The following ANOVA table has some of her results. Please help her answer her research questions by completing the following ANOVA table below and answering the follow-up questions. Be sure to label your answers with the appropriate letter and show all your work! Source Sums of Squares df Mean Square F Effect (between) Error (within) 100.90 ------ Total 170.10 ------- ------ a) What is the Sums of Squares (SS) between (effect)? b) What are the Mean Square (MS) between (effect) and the MS within (error)? c) What are the degrees of freedom (df) between, the df within, and the df total? d) What is the overall F-statistic? e) Based on the…Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings.• Life satisfaction and experience of daily stress: r = .57 (p = .01)• Number of friends one has and experience of daily stress: r = .09, not sig.• Number of friends one has and life satisfaction: r = .36 (p = .04) Which of the following conclusions can Dr. Guidry draw about the number of friends one has and life satisfaction based on her statistical analyses? a. The probability of her sample coming from a zero association population is about 4%. (correct answer) b. The probability of her sample coming from a zero association population is about 96%. c. The relationship is not statistically significant. d. The strong correlation means that the number of friends one has causes an…
- . A developmental psychologist would like to determine how much fine motor skill improves for children from age 3 to age 4. He takes a random sample of 9 three-year old children and gives each a manual dexterity test that measures fine motor skill. He tests these same children a year later, when they are each four-years old. Higher scores on this test indicate better fine motor skills. Scores are recorded in the table below. Is there a significant difference in the motor skills from age three to four? Test with an α = 0.05. What type of error is possible based on the outcome? What is the mean motor skill score for the children at age three? What is the mean motor skill score for the children at age four? Explain the advantage of using a dependent measures design over the independent measures design. What are some disadvantages?Professor Rouge wants to see if the color red increases people's attraction. For all participants, she shows them someone in a red shirt, someone in a blue shirt, and someone in a green shirt - and the participant rates each person from 1-10 in terms of their attractiveness. The data that she collected are below. Conduct the appropriate statistic in order to test her hypothesis. Include calculations of the effect size. Report your findings in a brief paragraph (a complete paragraph, like the one from class) and include the two tables that we did in class. Participant Red Green Blue 1 7 2 6. 10 7 6. 4 8 Upload Choose a File 6.Do larger universities tend to have more property crime? University crime statistics are affected by a variety of factors. The surrounding community, accessibility given to outside visitors, and many other factors influence crime rate. Let x be a variable that represents student enrollment (in thousands) on a university campus, and let y be a variable that represents the number of burglaries in a year on the university campus. A random sample of n = 8 universities in California gave the following information about enrollments and annual burglary incidents.x 12.3 28.6 24.5 14.3 7.5 27.7 16.2 20.1y 23 72 39 23 15 30 15 25 a) Compute r. (Round your answer to four decimal places.)