A bank is opening a new branch in one of neighborhoods.One of factors considered by the bank was whether theaverage monthly family income (in thousand pesos) in thetwo neighborhoods differed. From census records, thebank drew two random samples of 100 families each andobtained the following information:Sample A: x = 10,800; ơ =300; n = 100%3D%3DSample B: x2 = 10,300; 02 = 400; n2 = 100%3D%3D%3DThe bank claims that the two neighborhoods have thesame mean income. Is the bank correct? Test thehypothesis using a = 0.10.

There is always some contention about the value of a parameter or the relationship between…

Answered: A bank is opening a new branch in one…

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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As practiced by many in buying skirts or pants, they use the neckline to check if the waistline of the skirts or pants fits them. We would like to study this claim by using a random sample of neckline and waistline of 15 people. The data collected are summarized as follows: Subject 1 2 3 4 5 6 7 8 9 10 11 12 14 15 13 Neckline 35 34 38 45 38 33 38 42 44 33 35 31 33 35 30 (cm) Waistline(cm) 83 97 100 86 82 77 82 91 62 93 57 67 93 57 3-4. The regression equation is: Waistline' = - 3.9964 2.30321 neckline 5. Using the regression equation/model for waistline in Number 3-4, estimate the waistline if the neckline of a person is 37 cm. Round off final answer to two decimal places. 6-8. Solve for the coefficient of determination, r2 (Express the answer in percentage form, r2 x 100%; Round off final answers to two decimal places): E(y/ – 9)² = E(y – 9)² = 9. Solve for the coefficient of nondetermination (Express the answer in percentage form; Round off final answer to two decimal places):
table 1 gives flight arrival numbers from a random sample of flights for airlines. Airline 1 early =133 on-time = 416+ late =150 total 699.. Airline 2 early =58 on-time =354 late =87 total =499. total early = 191 on-time =770 late =237 overall total =1198 . Test whether there is a difference between the two airlines in the percent of flights that arrive late. FIND THE RELEVANT SAMPLE PROPORTIONS IN EACH GROUP AND THE POOLED PROPORTION. P HAT 1= ? P HAT 2= ? P HAT = ? STATE THE NULL AND THE ALTERNATIVE HYPOTHESES? GIVE THE TEST STATISTIC AND THE P-VALUE?…
9. Which formula is applicable when dealing with data about the sample means? A. z = * В. пл (1-п) C. . *-H D. *-H
Maryland, as the four U.S. cities with the highest percentage of millionaires (Kiplinger website). Consider a sample of data that show the following number of millionaires for samples of individuals from each of the four cities. Millionaire Cannot conclude Bridgeport, CT CA San Jose, CA Yes 42 36 No 458 264 a. What is the estimate of the percentage of millionaires in each of these cities (to 1 decimal)? 0.436 Use Table 3 of Appendix B to find the p-value. The p-value is greater than 0.10 What is your conclusion? City Washington, D.C. 35 365 Bridgeport, San Jose, Washington, Lexington Park, CT D.C. MD Lexington Park, 46 27.4 Percentage, % 36.5 b. Using a = 0.05 level of significance, test for the equality of the population proportion of millionaires for these four cities. What is the p-value? Compute the value of the x² test statistic (to 3 decimals). 36.5 MD 33 367 that there is a difference among the population proportion of millionaires for these four cities.
33) The owner of a manufacturing plant employs eighty people. As part of their personnel file, she asked each oneto record to the nearest one-tenth of a mile the distance they travel one way from home to work. The distancesfor a random sample of six employees are listed below:26 32 29 16 45 19Find the variance for the given data.A) 107.0 mi2 B) 18.9 mi2 C) 15.8 mi2 D) 5043.6 mi2
Suppose I want to sample the household incomes for EBR parish. Let's say I start with a simple random sample of 100 residents and calculate the sample mean. How would the sampling distribution of change if I increase the sample size to 1,000 residents?
The single sample z test may be used to determine: a)the variability in the sample b)if a sample mean is different from a known population mean c)if two population means are different d)the variability in the population of sample means
1. A dog groomer is often asked if small dogs bark more than larger dogs. To test this, he logs the number of separate barking episodes per day for three size dogs: small, medium, and large. In a separate file you will find the number of barking episodes for 12 dogs. On average, small dogs barked the most Mean: 7.25 On average, medium sized dogs barked the least Mean: 2.75 A. Do the different size dogs bark a significantly different number of times? Test with an α = 0.05. B. If appropriate, use Tukey’s HSD post hoc test and report where the differences are. If inappropriate, state why. C. Calculate and interpret the effect size.
If two large random samples are drawn from two populations, each having a mean of $100, the relevant sampling distribution of their difference has a mean of a. 200 b. The Sum of the 2 Sample Means C. 0 D. The difference between the two sample means.

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