We poll 800 people and find that 60% favor Candidate S. In order to estimate with 99% confidence the percent of ALL voters would vote for Candidate S, we should use: O TInterval O2-SampZint O1-PropZInt O ZInterval O2-PropZInt O2-SampTint
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- What is meant by the sample space of an experiment?List the sample space of each experiment. Selecting a letter of the alphabetonly need help with part d and e The weight was recorded for each newborn baby in a sample of 30. A 95% confidence interval for μ is (7, 20) ounces.a) The individual object in the study was a randomly selected _____. This is computer-graded so use exact wording from the problem above. Correctb) What was the variable information recorded for each object in the study? This is computer-graded so use exact wording from the problem above. Correctc) State the statistical interpretation of the confidence interval in the context of this problem. Correct the Correct weight of Correct newborn babies is/are between 7Correct Correct and 20Correct Correct d) What is the symbol and value of the point estimate for μμ? = ouncese) What is the margin of error for the given interval? ouncesf) Fill in the boxes below to show the relation on the number line between the numeric values of the point estimate and the interval estimate for μμ.…
- Conditions For each situation described below, identify the population and the sample, explain what p and pn rep-resent, and tell whether the methods of this chapter can be used to create a confidence interval.a) Police set up an auto checkpoint at which drivers arestopped and their cars inspected for safety problems.They find that 14 of the 134 cars stopped have at least one safety violation. They want to estimate the per-centage of all cars that may be unsafe. b) A TV talk show asks viewers to register their opinionson prayer in schools by logging on to a website. Of the602 people who voted, 488 favored prayer in schools.We want to estimate the level of support among thegeneral public.c) A school is considering requiring students to wear uniforms. The PTA surveys parent opinion by send-ing a questionnaire home with all 1245 students; 380 surveys are returned, with 228 families in favor of thechange.d) A college admits 1632 freshmen one year, and fouryears later 1388 of them graduate…A study of 1700 participants looked at the association between Tamoxifen and uterine cancer. The study included 689 cases. There were 139 cases and 58 controls taking Tamoxifena) What study design was used b) Calculate estimates of OR of the above study c) Calculate the 95% confidence limits for the above OR d) Interpret the measure of association above and write a brief report to the Uganda cancerinstitutea) Three confidence intervals were constructed using the same sample. Place these intervals in order from lowestconfidence to highest confidence: (17, 23) (14, 26) (18, 22)b) What was the sample mean of the data used to construct the intervals in part a?
- The captain of a military ship has seen another ship in the distance. It is foggy and visibility is not great. You kno All ships in this area are either commercial ships or pirate ships: 90 percent are commercial ships and 10 percent are pirate ships. The captain identified the ship as pirate. The captain’s recognition capabilities have been tested in foggy conditions as part of his training. In his training, he made correct identificationscent of the time and erred 20 percent of the time. For (a)–(d) to get the full points you need to write down the formulas you are using and all the steps of your calculations. (a) What is the probability that a randomly selected ship in the area would be a pirate ship and that the captain would correctly identify it as such? (b) What is the probability that a randomly selected ship in the area would be commercial and that the captain would incorrectly identify it as pirate? (c) What is the probability that a randomly selected ship in the area would…develop a research question that can be addressed with the dependent-samples t test, making sure to state the null and alternative hypotheses (in words)4) The 90% confidence interval of the mean 5) Construct a complete hypothesis test and determine if the two groups have significantly different balance using α = 0.05. Write a one page introduction to your research, discuss how you selected your sample (is it a random sample?), and write a one page conclusion. Present your data in an organized manner.
- The data referred to in this question were collected from several sales districts across the country. The data represent sales for a maker of asphalt roofing shingles. Information on the following variables is available: Sales Sales from last year in thousands of squares Expenditures Promotional expenditures in thousands of dollars Accounts Number of active accounts Competing Brands Number of competing brands producing equivalent or similar products District Potential A coded indicator of the potential of the district (higher score = better potential) Partial SPSS regression output of a multiple regression model with sales as the response variable and the other four variables as predictor variables is given below: ANOVA Sum of Model Squares df Mean Square F Sig. Regression 176777.1 4 44194.265 479.099 .000 Residual 1937.137 21 92.245 Total 178714.2 25 Coefficients Unstandardized Standardized Coefficients Coefficients Model Std. Error Beta t Sig. (Constant) Promotional Expenditures 1…Suppose the cholesterol levels of 6 patients before taking a medicine (the first number) and after taking a medicine (the second number) are (225,194),(222,205),(202,203),(222,207), (224,205),(217,205), then the 99% confidence interval for the difference between the two cholesterol levels is O a. (2.04,28.96) O b. (-1.60,32.60) O c. (-34.2018,65.20) Od. None of these O e. (-57.01,88.01)A study of all 2093 employees of a company shows that 54% are satisfied with the company's health care policy. Is the underlined value a parameter or a statistic and why? O Statistic because the value was calculated from a sample. O Parameter because the sample size is known. O Statistic because the value was calculated from a population. O Parameter because the value was calculated from all students.