For the following sample sizes and confidence levels, find the t-values suitable for building confidence intervals:
a) n = 15; 90%.
b) n = 6; 95%.
c) n = 19; 99%.
d) n = 25; 98%.
e) n = 10; 99%.
f) n = 41; 90%.
For the following sample sizes and confidence levels, find the t-values suitable for building confidence intervals:...
2. Find the critical values, Z-scores, for the following confidence intervals by showing a graph and respective areas: a) 90% z-scores b) 99 % t-scores. n=51
19. Given a test statistic: Zc 2 and the known Z-values for common confidence intervals: 1.645, 1.96, and 2.576 for the 90%, 95% and 99 % confidence levels respectively. Can you reject the null hypothesis at the 95% confidence level? Be sure to define and discuss the test statistic and Z-values in your answer.
Q3: Practice building Confidence Intervals For each scenario, take the sample data and build up the specified confidence interval for the specified population parameter. a. Scenario: You want to know the average number of calories you consume per day. Over the next 5 months you randomly select 25 days and carefully record your consumption on those days (assume that you don't change your eating habits) Build an 80% confidence interval for your average daily consumption of calories if the following...
Find zα/2 for each of the following confidence levels used in estimating the population proportion. Round your answers to 3 decimal places.) zα/2 a. 90% b. 98% c. 85% d. 95% e. 99%
If sample size is 15, below please fill the UPPER and LOWER critical values of the standard normal distribution and t distribution under the various confidence levels. (20%) Confidence level standard normal distribution t distribution 80% _______________ _______________ 90% _______________ _______________ 95% _______________ _______________ 98% _______________ _______________ 99% _______________ _______________
Determine the t critical value for a two-sided confidence interval in each of the following situations. (Round your answers to three decimal places.) (a) Confidence level = 95%, df = 10 (b) Confidence level = 95%, df = 15 (c) Confidence level = 99%, df = 15 (d) Confidence level = 99%, n = 5 (e) Confidence level = 98%, df = 22 (f) Confidence level = 99%, n = 38 You may need to use the appropriate table in...
Determine the t critical value for a two-sided confidence interval in each of the following situations. (Round your answers to three decimal places.) (a) Confidence level-95%, df-10 (b) Confidence level-9596, d-15 (c) Confidence level = 9996, df = 15 (d) Confidence level 99%, n-10 (e) Confidence level-98%, af 21 (F) Confidence level 99%, n36
Find a confidence interval for μ assuming that each sample is from a normal population. (Round the value of t to 3 decimal places and your final answers to 2 decimal places.) (a) x⎯⎯ x ¯ = 25, s = 5, n = 7, 90 percent confidence. The 90% confidence interval is to (b) x⎯⎯ x ¯ = 50, s = 4, n = 19, 99 percent confidence. The 99% confidence interval is to (c) x⎯⎯ x ¯ = 121,...
14) Find critical values. a) Find the value from table for the indicated confidence level (by using A-2 table). Draw the curve and show all of your work, like we did in the classroom 80% 85% b) Find the value from Table A - 3 for the indicated confidence level and sample size. 95% confidence and n=19 98% confidence and n-22 c) Find the critical values Xi and X(by using A-4 table) that correspond to the given confidence level and...
10. -/10 points DevoreStat9 7.E.030 Determine the t critical value for a two-sided confidence interval in each of the following situations. (Round your answers to three decimal places.) (a) Confidence level = 95%, df = 10 (b) Confidence level 95%, dr 15 (c) Confidence level-99%, df 15 d) Confidence level = 99%, n = 10 (e) Confidence level 98%, df-23 (f) Confidence level 99%, n-34