.Probability of accept a hypothesis when it is wrong is known as O a. Confidence level O b. Type II error O c. Significance level O d. Type I error
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- 22. The probability that a 95% confidence interval calculated from a random sample of a normally distributed variable contains the true value of the target parameter is 95%. Group of answer choices True FalseThe two main methods of statistical inference are Confidence Intervals and Hypothesis Testing. 1) TRUE 2) FALSEIf a confidence interval is __________, this means the point estimate is not directly in the center of the interval. A. two-sided B. symmetric C. non-symmetric D. inferential
- 5Suppose in one season, one baseball team averaged 20 run per game ( team 1), and team 2 averaged 10 runs . Assume each team had 10 hitters (n=10 for both). Assume that we don’t know the population standard deviations on each teams hits, but assume the sample standard deviations are 5 for each team. Test whether this difference is significant at the 95% confidence level, i.e., it is rarely likely to occur by chance if one team isn’t really better than the other. Use this information to answer questions 8 -12 below (Hint: Solve like “Are Men and Women Equal Talkers” Problems) The appropriate test statistic for testing whether the difference between these two means is unlikely to have happened by chance is the z-statistic b .t-statistic chi-square statistic F-statistic The value of the test statistic is (assume population standard deviations are unknown, and not equal). 14.14 .401 .600 4.46 At the 95% confidence level, can we say this is a common difference in…SELECT ALL THAT APPLY. If a 95% confidence level is selected, then a. the corresponding Z score is 2.58. b. the probability of a selected sample falling in this interval is 0.95. c. there is a 5% chance of the interval being incorrect. d. 5 chances out of 100 will fall in the interval.
- Suppose that Tom and Jerry determine confidence intervals using the same confidence level, based on the same sample proportion. Tom uses a larger sample size than Jerry. How will the midpoint and width of the confidence intervals compare? Same midpoint and same width Same midpoint, Tom has a wider interval Same midpoint, Jerry has a wider interval Same width, Tom has a larger midpoint Same width, Jerry has a larger midpoint Tom has a larger midpoint, wider interval Jerry has a larger midpoint, wider intervalcutive pusu 8. A survey will be conducted on the use of social media among senior high school students. a. How large a sample must be obtained if the researchers want to be 95% confident that the maximum error will not exceed 5%? b. Suppose the researchers conducted the survey involving 500 senior high school students and 400 responded that they have social media accounts. Give the 99% confidence interval for the true proportion of senior high school students who have social media accounts.randtrom expects 1 argument If a school district takes a random sample of 80 Math SAT scores and finds that the average is 442, and knowing that the population standard deviation of Math SAT scores is intended to be 100. Find a 99% confidence interval for the mean math SAT score for this district. Submit Question
- UrgentA box model is used to calculate a confidence interval in the following scenario: A institution selects 300 households in a town asking about their annual income. They want to construct a confidence interval for the percentage of people having income more than $100,000 annually. For each of the following quantities in the box model, select the answer if the quantity is random, not fixed. Leave the quantities that are fixed unselected. O the EV and SE of the sample percentage of households having income more than $100. 000 annually O the population percentage of households having income more than $100,000 annually O the sample percentage of households having income more than $100,000 annually O the proportion of 1's in the box model