Force Data1,896 1,735 1,687 1,625 1,6071,853 1,697 1,701 1,662 1,7021,849 1,740 1,7571,6861,769 1,568 1,681 1,595 1,6601,8901,793 1,823 1,762 1,7521,687 1,842 1,656 1,7341,845 1,7970I A manufacturing company produces electric insulators. You define the variable of interest as the strength of theinsulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry outdestructive testing to determine how much force is required to break the insulators. You measure force by observinghow many pounds are applied to the insulator before it breaks. The accompanying data represent the amount of forcerequired to break a sample of 30 insulators. Complete parts (a) through (c) below.Click the icon to view the data.a. Construct a 95% confidence interval for the population mean force.ο sus Π(Round to the nearest integer as needed.)

Answered: a. Construct a 95% confidence interval…

Math

Statistics

a. Construct a 95% confidence interval for the population mean force. sus D (Round to the nearest integer as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Construct a 99% confidence interval for u, - H, with the sample statistics for mean cholesterol content of a hamburger from two fast food chains and confidence interval construction formula below. Assume the populations are approximately normal with unequal variances. Stats X1 = 105 mg, s, = 3.71 mg, n, = 16 X2 = 92 mg, s2 = 2.02 mg, n2 = 12 %3D si s3 Confidence interval when (X1 - X2) - to variances are not equal
2.13 The t-value that would be used to construct a 99% confidence interval for the mean with a sample of size n-17 would be a. 2.898 b. 2.567 C. 2.921 d. 2.583 2.14 A confidence interval was used to estimate the proportion of statistics students that are female. A random sample of 72 statisticS students generated the following 90% confidence interval: (0.438, 0.642). Using the information above, what size sample would be necessary if we wanted to estimate the true proportion to within ±0.08 using 95% confidence? a. 420 b. 150 c. 105 d. 597 Calculations:
A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 54 men and 70 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. Two sample T for Men vs Women N Mean StDev SE Mean Men Women 98% CI for mu Men - mu Women (- 12.20, - 1.00) T-Test mu Men = mu Women (vs H2 O C. Ho: H1 = H2; Ha: H1 #H2 (b) Identify the P-value and state the researcher's conclusion if the level of significance was a = 0.01. What is the P-value? P-value =
A study found that a 95% confidence interval for the mean μ of a particular population was computed from a random sample of 1200 people and found it to be 10 ± 4. Therefore, we may conclude:
a. What are the sample estimates of β0,β1,and β2? b. What is the least squares prediction equation? c. FindSSE,MSE,and standard deviation . Interpret the standard deviation in the context of the problem. d. Test H0: β1=0 against Ha: β1≠0.Use α=0.01. e. Use a 95% confidence interval to estimate β2. f. Find R2 and R^2_a and interpret these values. g. Find the test statistic for testing H0: β1=β2=0. h. Find the observed significance level of the test in part g.interpret the result.
The yield per tract in a certain region of farmland is known to have a populationstandard deviation of 13 bushels. Using the old seed variety, the population mean yield μwas 39 bushels. A farmer tests a new seed variety on a random sample of 36 tracts, andfinds a sample mean yield of 45.2 bushels. Is the population mean yield using the newseed variety different from 39? Use α= 0.10.a. State the null hypothesis . __________________State the alternative hypothesis.____________________b. Find the test statistic. _____ c. Find the P-value for the test. _____________
A random sample of 10 items is taken from a normal population. The sample had a mean of 82 and a standard deviation is 26. Which is the appropriate 99% confidence interval for the population mean? a. 82tzo0os (26) b. 82±io0os (26) C. 82tzo01 20 26, W10 26 d. 82±to00s 10
Researchers were interested in the impact of texting on student learning. A group of 99 college students received texts from the researcher during a prerecorded psychology lecture. At the end of the 20-minute lecture, students answered a 17-question quiz about the material that had just been presented; scores were compared to a population mean of 15 on the test, though the population standard deviation was unknown. Which statistical test should the researchers use to analyze their data? a. dependent-samples t test b. one-sample t test c. independent-samples t test d. z test
The manager at a large fitness centre keeps track of amount of time it takes a sample of 65 clients to run a mile she finds the mean time to run a mile in this sample is 10.4 minutes with standard deviation of 2.1 minutes. Assume that the sample is random sample that is normally distributed. a. Construct a 68, 95, 99 confidence interval for the parameter of interest in this problem.
Gn. don't provide handwriting solution
If X=115, 25, and n = 31, construct a 99% confidence interval estimate of the population mean, μ. ☐ sμs ☐ (Round to two decimal places as needed.)
A researcher predicts that smoking cigarettes decreases a person's sense of smell. On a test of olfactory sensitivity (smell), the mean for non-smokers is 18.4. A sample of 12 people who smoke a pack each day have a sample mean of 16.25 (sample variance = 4.75). Complete the following statement: We ["", ""] the null. Smokers have ["", "", ""] in olfactory sensitivity compared to non-smokers.