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- What is the function to got variance sigma 40?Obesity is an increasing problem in America among all age groups. A recent study reparted 1276 individuals in a sample of 4115 adults were found to be obese (a body mass index exceeding 30; this index is a measure of weight relative to height). Five years ago, surveybased on people's own assessmentrevealedthat 20% of adult Americans considered themselves obese. Daes the mostrecent data suggest that the true propartion of adults who are abese is more than 1.5 times the percentage from the self-assessment survey? Carryout a test using a significance level of 5%. Question 3 Determine the critical value. O z- 1.645 O t= -1.645 z = 1.96 z = 1.282 O t= 1.96 z = -1.282 Frfff n (Ctrl) -The researcher hypothesizes that partners' attitudes are significantly related to each other. Test the typothesis with a coffelation and with out your conclusion. Show your work
- 'prestig10' what does that mean according to GSSWhat does power curve shows?Can you please anwer all parts of the question. The Conference Board produces a Consumer Confidence Index (CCI) that reflectspeople’s feelings about general business conditions, employment opportunities, and their own income prospects. Some researchers feel that consumer confidence is a function of median household income. Shown here are CCIs for 9 years and median household incomes for thesame 9 years published by the U. S. Bureau of the Census.
- What is meant by unbiasedness of estimators?Suppose the scores of students on an exam are normally distributed with a mean of 376 and a standard deviation of 30. Then approximately 95% of the exam scores lie between the integers _ & _ such that the mean is half way between these two integers. I know the answers are 316 and 436. But I don't know how they got them. I cannot use excel and so I need help to solve this by hand. Thanks so much in advance!Hello, I'm having a hard time computing all of this: Solve and find the mean, observation from each treatment. Experimental Setup Trial 1 Trial 2 Trial 3 Treatment 1 20-30 seconds 20-30 seconds 20-30 seconds 6 7 1 Treatment 2 20-30 seconds 20-30 seconds 20-30 seconds 5 4 5 Treatment 3 20-30 seconds 20-30 seconds 20-30 seconds 3 4 7 Controlled Setup Trial 1 Trial 2 Trial 3 Controlled Treatment 20-30 seconds 20-30 seconds 20-30 seconds 7 10 10
- Suppose we want to test the hypothesis that mothers with low socioeconomic status (SES) deliver babies whose birth weights are different from normal. To test this hypothesis, a random sample of 100 birth weights is selected from a list of full-term babies of SES mothers. The mean birth weight is found to be 115 oz. Suppose the average birth weight of all babies (based on nationwide surveys of millions of deliveries) is known to be 120 oz with = 24 oz. Set = .05 Assume all conditions are met, what is the p-value of their test? Give your answer to 4 decimal places.If an F statistic is negative, which of these statements is true?Suppose a data file from a certain study has information for the following variables: 1. Gender- (X1) 2. Monthly income in US dollars- (Y) 3. Carownership (own a car/does not own a car)-(X2) 4. Age (X3) From such a hypothetical data set, answer the following questions: a) Suggest how you can define dummy variables for the nominal variables gender, and car ownership b) Suggest the null and alternative hypotheses for a global F-test examining the joint significance of coefficients of the independent variables in the model E(Y)=B0 + B1X1 +B2X2 +B3X3 c) Interpret the parameters BO, B1, B2, and B3 for the model in b) above
