t test confidence interval best suit for this case.
Which test statistic should be used when computing a confidence interval given only the number in...
Of the following general derivations, choose the formula that you need for computing a confidence interval: Select one: a. Confidence interval = sample statistic + margin of error b. Confidence interval = sample statistic + standard deviation c. Confidence interval = population parameter + margin of error d. Confidence interval = population parameter + standard deviation
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation . Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. 21) A sociologist develops a test to measure attitudes about public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95%...
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal pl aces as the sample standard deviation. 21) A sociologist develops a test to measure attitudes about public transportation, and 27 21) randomly selected subjects are given the test. Their mean scoreis 76.2 and their standard deviation is 21.4. Construct the...
Suppose the 90% confidence interval for the mean SAT scores of applicants at a business college is given by [1,694, 1,836]. This confidence interval uses the sample mean and the sample standard deviation based on 25 observations. [You may find it useful to reference the t table.] What are the sample mean and the sample standard deviation used when computing the interval? (Round "t" value to 3 decimal places and “Sample mean” and "Sample standard deviation" to 2 decimal places.)
Confidence Interval Given. Assume I created a 95% confidence interval for the mean hours studied for a test based on a random sample of 64 students. The lower bound of this interval was 4 and the upper bound was 14. Assume that when I created this interval I knew the population standard deviation. Using this information, (a) Calculate the width of the interval. (b) Calculate the margin of error for the interval. (c) Calculate the center of the interval. (d)...
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a nomn to the same number of decimal places as the sample standard deviation. al distribution. Round the confidence interval limits 7) The mean replacement time for a random sample of 20 washing machines is 10.9 years and the standard deviation is 2.7 years. Construct a 99% confidence interval for the standard deviation, o, of...
QUESTION 4 Which distribution would you make use of when constructing a confidence interval given the following information: Sample mean is 9.4, sample standard deviation is 7.8, sample is size is 100. A. Both B. Neither ОСТ D. Normal
statistics itl 5 LTE Confidence Interval for the P... DOCX -16 KB Close Confidence Interval for the Population Mean l. Determine the critical values for 80%, 90%, 95%, and 99%; 2. Construct 80%, 90%, 95%, and 99% confidence interval for the population mean given that the standard deviation of the population is 900 and the sample mean is 425 and the sample consist of 100 points of data 3. Find the T interval for the following: Construct 80% 90%. 95%,...
Use the given degree of confidence and sample data to construct a confidence interval for the population mean u. Assume that the population has a normal distribution. A sociologist develops a test to measure attitudes towards public transportation, and 27 randomly selected subjects are given the test. Their mean score is 76.2 and their standard deviation is 21.4. Construct the 95% confidence interval for the mean score of all such subjects. 074.6 < u < 77.8 0 69.2 < <...
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation o. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. College students' annual earnings: 98% confidence; n = 9, sample mean is $4121, s = $873 $551<o< $1925 O $590 < 0 < $1672 $531 < o < $1708 $687 <o< $1139