Do one of the following, as appropriate. (a) Find the critical value z/2, (b) find the critical value t/2, (c) state that neither the normal nor the t distribution applies.Confidence level 99%; n= 28; o is known; population appears to be very skewed.t-tableClick here to view a table of critical t-values.Click here to view page 1 of the standard normal table.Click here to view page 2 of the standard normal table.Find the critical value.t distribution: Critical t valuesO A. tu/2 = 2.771Area in One Tail0.0250.0050.050.100.01O B. Za/2 = 2.575Degrees ofFreedomArea in Two Tails0.050.010.100.200.02Oc. ta/2 = 2.47331.8216.9654.5413.7473.3653.1432.9982.8962.8212.7642.7182.68112.7064.3033.1822.7762.5712.4472.3652.3062.2622.2282.2012.179163.65763.6576.3142.9202.3532.1322.0151.9431.8951.8601,8331.8121.7961.7821.7713.0781.8861.6381.5331.4761.4401.4151.3971.3831.3721.3631.3561.3501.350O D. Za/2 = 2.339.9255.8415.8414.604O E. Neither normal nor t distribution applies.4.0323.7076.3.4993.3553.2503.1693.1063.0553.0553.0121012132.160

Here population appears to be very skewed, So, we cannot assume the distribution to be Normal. So,…

Answered: Do one of the following, as…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Use the normal distribution of SAT critical reading scores for which the mean is 508 and the standard deviation is 118. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 625? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 550? Click to view page 1 of the standard normal table. Click to view page 2 of the standard normal table. (a) Approximately 81.59 % of the SAT verbal scores are less than 625. (Round to two decimal places as needed.) (b) You would expect that approximately 363 SAT verbal scores would be greater than 550. (Round to the nearest whole number as needed.)
Do one of the following, as appropriate. (a) Find the critical value z/2, (b) find the critical value t,/2, (c) state that neither the normal nor the t distribution applies. Confidence level 95%; n= 28; o = 31.5; population appears to be normally distributed. i t-table Mastering here to view a table of critical t-values. VInuk here to view page 1 of the standard normal table. Click here to view page 2 of the standard normal table. Find the critical value. t distribution: Critical t values O A. Za/2 = 1.645 Area in One Tail 0.025 0.005 0.01 0.05 Area in Two Tails 0.05 Degrees of O B. ta/2 = 1.703 Freedom 0.01 0.02 0.10 O C. Za/2 = 1.96 63.657 31.821 12.706 6.314 2. 9.925 6.965 4.303 2.920 O D. ta/2 = 2.052 5.841 4.541 3.182 2.776 2.353 4.604 3.747 2.132 4.032 3.707 3.365 2.571 2.447 2.015 Click to select your answer. 1.943 6. 3.143 3.499 2.998 2.365 1.895 3.355 3.250 2.896 2.306 2.262 1.860 Save for Later 2.821 1.833
Pumpkins from a local farmer have a mean weight of 16 pounds with a standard deviation of 2.5 pounds. What is the z-score of an 21 pound pumpkin? z=-2 z=+2 z=-1 z=+1
Do one of the following, as appropriate. (a) Find the critical value z,/2. (b) find the critical value t/2. (c) state that neither the normal nor the t distribution applies. Confidence level 90%; n= 27; o is unknown; population appears to be normally distributed. Click here to view a table of critical t-values. Click here to view page 1 of the standard normal table. Click here to view page 2 of the standard normal table. i t-table Find the critical value. O A. Za/2 = 1.645 t distribution: Critical t values O B. t/2 = 1.706 Area in One Tail 0.025 0.005 0.01 0.05 0.10 Oc. ta/2 = 1.315 Degrees of Area in Two Tails Freedom 0.01 0.02 0.05 0.10 0.20 O 20 O D. Z/2 = 1.28 63.657 9.925 31.821 6.965 12.706 6.314 3.078 4.303 2.920 1.886 O E. Neither normal nor t distribution applies. 5.841 4.604 3.182 2.353 4.541 1.638 3.747 2.776 2.132 1.533 4.032 3.707 3.365 2.571 2.447 2.015 1.476 6. 3.143 1.943 1.440 7. 3.499 2.998 2.365 1.895 1.415 3.355 2.896 2.306 1.860 1.397 3.250 2.821 2.262 1.833 1.383…
Use the normal distribution of SAT critical reading scores for which the mean is 501 and the standard deviation is 116. Assume the variable x is normally distributed. (a) What percent of the SAT verbal scores are less than 625? (b) If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 550? Click to view page 1 of the standard normal table. Click to view page 2 of the standard normal table. (a) Approximately% of the SAT verbal scores are less than 625. (Round to two decimal places as needed.) (b) You would expect that approximately SAT verbal scores would be greater than 550. (Round to the nearest whole number as needed.)
For the specified margin of error and confidence level, obtain a sample size that will ensure a margin of error of at most the one specified. margin of error = 0.03; confidence level = 90% Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. n= (Round up to the nearest integer.)
Do one of the following, as appropriate. (a) Find the critical value za/2, (b) find the critical value ta/2, (c) state that neither the normal nor the t distribution applies. Confidence level 99%; n= 23; o is unknown; population appears to be normally distributed. Click here to view a table of critical t-values. Click here to view page 1 of the standard normal table. Click here to view page 2 of the standard normal table. t-table Find the critical value. t distribution: Critical t values O A. ta/2 = 2.508 O B. ta/2 = 2.819 Area in One Tail 0.005 0.05 0.10 0.01 0.025 Degrees of Freedom Area in Two Tails 0.05 O C. Za/2 = 2.575 O D. Za/2 = 2.33 0.01 0.10 0.20 0.02 31.821 6.965 4.541 3.747 3.365 3.143 2.998 63.657 12.706 4.303 3.182 2.776 2.571 2.447 2.365 1 6.314 2.920 2.353 2.132 2.015 1.943 1.895 3.078 1.886 1.638 1.533 1.476 1.440 1.415 9.925 5.841 4.604 4.032 3.707 E. Neither normal nor t distribution applies. 6. Click to select your answer and then click Check Answer. 3.499
A random sample of 10 chocolate energy bars of a certain brand has, on average, 280 calories per bar, with a standard deviation of 15 calories. Construct a 90% confidence interval for the true mean calorie content of this brand of energy bar. Assume that the distribution of the calorie content is approximately normal. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. The confidence interval is (Round to one decimal place as needed.)
Suppose a sample of O-rings was obtained and the wall thickness (in inches) of each was recorded. Use a normal probability plot to assess whether the sample data could have come from a population that is normally distributed.. Click here to view the table of critical values for normal probability plots Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. 0.180 0.188 0.192 0.199 0.213 0.218 0.227 0.240 0.264 0.266 0.287 0.288 0.303 0.304 0.317 0.308 Using the correlation coefficient of the normal probability plot, is it reasonable to conclude that the population is normally distributed? Select the correct choice below and fill in the answer boxes within your choice. (Round to three decimal places as needed.) OA. Yes. The correlation between the expected z-scores and the observed data, data come from a normal population. OB. No. The correlation between the expected z-scores and the observed data, that…
A random sample of 10 chocolate energy bars of a certain brand has, on average, 240 calories per bar, with a standard deviation of 15 calories. Construct a 90% confidence interval for the true mean calorie content of this brand of energy bar. Assume that the distribution of the calorie content is approximately normal. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. The confidence interval is <µ< (Round to one decimal place as needed.)
Examine the normal quartile plot and determine whether it depicts sample data from a population with a normal distribution Does the normal quantile plot depict sample data from a population with a normal distribution? A. No. The points do not lie close to a straight lineB. Yes. The points are evenly distributed above and below the mean, 0C. The points exhibit some systematic pattern that is not a straight-line patternd. Yes. The pattern of the points is reasonable close to a straight line.

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