When we set a = 0.05 for a hypothesis test, we are setting O the probability of reaching the wrong conclusion to 0.05 O the probability of a Type Il error equal to 0.05 the probability of reaching the correct conclusion equal to 0.05 O the probability of a Type I error equal to 0.05
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- Explain probability and nonprobability samplingtechniques.A presidential election poll contacts 2,000 randomly selected people. Should the number of people that support candidate A be analyzed using discrete or continuous probability models?The sum of the probabilities for all the experimental outcomes in a probability distribution must equal 1. True O False
- 2. A city had an unemployment rate of 7%. The mayor pledged to lower this figure and supported programs to decrease unemployment. A group of citizens wanted to test with 0.032 label of significance if the unemployment rate had actually decreased, so they obtained a random sample of 500 citizens to see what proportion of the sample was unemployed. Only 32 citizens in the above sample is still unemployed. What is the probability of Type II error if the actual unemployment rate is 6.5% please don't use software everything needs to be done by hand. Explain because I don't understand my professor. Note:- Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. Answer completely. You will get up vote for sure.Question in economics statistics: A committee of 4 persons is to be appointed from 3 officers of the production department, 4 officers of the purchase department, two officers of the sales department and I chartered accountant. Find the probability of forming the committee in the following manner : (i) There must be one from each category (ii) It should have at least one from the purchase department (iii) The chartered accountant must be in the committee?Student body elections are coming up and there are a lot of options. There are 3 candidates for president, 4 for secretary, and 10 for mascot. Suppose a student were to fill out their ballot by randomly picking a candidate or abstaining for each position. Each outcome in the sample space for the random ballots is equally likely. What is the probability of each outcome in the sample space? 17 120 220
- Suppose that researchers conduct a clinical trial to test the effectiveness of a new vaccine to prevent HPV-related cervical cancer. They compare HPV-related cancer rates in women who were vaccinated during adolescence to women who were not. The incidence of cancer in vaccinated women is statistically significant at the 1% level. (P=0.006). What is the probability of a Type I error for this hypothesis test? a) 0.006 O b) it is impossible to tell from the information given O c) 0.01 Page 24 of 25 Previous Page Next PageAn IBD/TIPP poll conducted to learn about attitudes toward investment and retirement asked male and female respondents how important they felt level of risk was in choosing a retirement investment. The following survey result was construed from the data of 500 respondents. "Important" means the respondent said level of risk was either important or very important. Important Not Important Total Male 150 132 282 Female 210 108 318 Total 360 240 500 a. Construct a probability table. b. What is the probability that a survey respondent will say level of risk is important? C. What is the probability a male survey respondent will say level of risk is important? d. What is the probability a female survey respondent will say level of risk is important? e. Do male and female attitudes toward risk differ? Hint: check if the level of risk is independent to the gender of the respondent.If a TV show has a rating of 8.0/16.0 what does it mean? а. 8% of all televisions in use at the time were tuned to that show, and 16% of all households with a TV were tuned to that show b. 50% of all households with a TV set were tuned to that show с. 8% of all households with a TV set were tuned to that show and 16% of all televisions in use at the time were tuned to that show d. 50% of all televisions in use at the time were tuned to that show
- The time taken to complete a bicycle race is normally distributed, with anaverage time (μ) of 2.25 hours and a standard deviation (σ) of 0.65 hours.What is the probability that a randomly selected cyclist will: Q.7.3.1 Take between 2.75 and 3.15 hours to complete the race? Interpretyour answer. Q.7.3.2 Take between 2.05 and 2.15 hours to complete the race? Interpretyour answer.According to a 2017 Wired magazine article, 40% of e-mails that are received are tracked using software that can tell the e-mail sender when, where, and on what type of device the e-mail was opened (Wired magazine website). Suppose we randomly select 50 received e-mails. a. What is the expected number of these e-mails that are tracked? b. What are the variance (to the nearest whole number) and standard deviation (to 3 decimals) for the number of these e-mails that are tracked? Variance Standard deviationIn an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table. Complete parts (a) through (c) below. Students Given Four Quarters Students Given a $1 Bill Purchased Gum 30 Kept the Money 19 13 26 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability is (Round to three decimal places as needed.) b. Find the probability of randomly selecting a student who kept the money, given that the student was given four quarters. The probability is (Round to three decimal places as needed.) c. What do the preceding results suggest? OA. A student given four quarters is more likely to have kept the money. OB. A student given four quarters is more likely to have spent the money than a student given a $1 bill. OC. A student given four quarters is more likely to have kept the money than a student given a…