Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each

Question:

Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each of two normal populations:

a. Calculate s2, the pooled estimator of s2.
b. Find a 90% confidence interval for (µ1 - µ2), the difference between the two population means.
c. Test H0: (µ1 - µ2) = 0 against Ha: (µ1 - µ2)

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Introduction To Probability And Statistics

ISBN: 9781133103752

14th Edition

Authors: William Mendenhall, Robert Beaver, Barbara Beaver

See More Books

Question Posted: Apr 15, 2016 07:24 AM

See More Questions

Suppose two independent random samples of sizes n1 = 9 and n2 = 7 that have been taken from two normally distributed populations having variances 21 and 22 give sample variances of an s21 = 100 and...
Consider two populations for which 1 = 30, 1 = 2, 2 = 25, and 2 = 3. Suppose that two independent random samples of sizes n 1 = 40 and n 2 = 50 are selected. Describe the approximate sampling...
Suppose two independent random samples of sizes n1 = 9 and n2 = l6 that have been taken from two normally distributed populations having variances 21 and 21 give sample variances of s21 = 100 and s22...
An abc-sequence balanced three-phase wye-connected source supplies power to a balanced wye-connected load. The line impedance per phase is 1 + j10, and the load impedance per phase is 20 + j20. If...
Bychowski Company purchased land containing an estimated 10 million tons of ore for a cost of $3,300,000. The land without the ore is estimated to be worth $600,000. The company expects that all the...
Explain why K 2 [PtCl 4 ] is first converted to K 2 [PtI 4 ] in the synthesis of the anticancer drug cisplatin, cis-PtCl 2 (NH 3 ) 2 .
Where should treasury bonds be shown on the balance sheet?
A conventional multiloop control scheme consisting of two PI controllers is to be used to control the product compositions xD and xB of the distillation column shown in Fig. The manipulated variables...
$200 to $260 in 24 months. What is the annualized HPY?
Sarita Construction Co. obtained a contract for construction of a dam. The following details are available in records of company for the year ended 31st March, 2018: PIn Lakhs Total Contract Price...
Find the critical value(s) of t that specify the rejection region in these situations: a. A two-tailed test with = .01 and 12 df b. A right-tailed test with = .05 and 16 df c. A two-tailed test...
Independent random samples of n1 = 16 and n2 = 13 observations were selected from two normal populations with equal variances: a. Suppose you wish to detect a difference between the population means....
(a) How long would the muon in Example 28.1 have lived as observed on the Earth if its velocity was 0.0500c? (b) How far would it have traveled as observed on the Earth? (c) What distance is this in...
In the circuit of Fig. 4-51 write two loop equations using I 1 and I 2 . Then find the currents and node voltages. A 3A ( 4 3 V 792 B +1 D w 392 12 C
The capacitor in the circuit shown in Fig. 7-37 has initial charge Q 0 = 800 C, with polarity as indicated. If the switch is closed at t = 0, obtain the current and charge, for t > 0. 100 V (+ 10 4 F
A gift shop sells 400 boxes of scented candles a year. The ordering cost is $$60$ for scented candles, and holding cost is $$24$ per box per year. What is the economic order size for scented...
Kay Vickery is angry with Gene Libby. He is behind schedule developing supporting material for tomorrows capital budget committee meeting. When she approached him about his apparent lackadaisical...
Tharpe Painting Company is considering whether to purchase a new spray paint machine that costs $$3,000$ . The machine is expected to save labor, increasing net income by $$450$ per year. The...
Let X and Y be independent continuous random variables with the densities e (x1)2 and respectively. Using Table 3 from the Appendix, estimate P(2 S 4), where S = X +Y.
Complete the following acid-base reactions: (a) HCCH + NaH
A study carried out by Baturin and colleagues looked at the effects of light on female mice. Fifty mice were randomly assigned to a regimen of 12 hours of light and 12 hours of dark (LD), while...
The idea of sending delinquents to Scared Straight programs has appeared recently in several media programs (such as Dr. Phil) and on a program called Beyond Scared Straight. So it seems appropriate...
A 2009 study analyzed data from the National Longitudinal Study of Adolescent Health. Participants were studied into adulthood. Each study participant was categorized as to whether they were obese or...
The Regal Cycle Company manufactures three types of bicyclesa dirt bike, a mountain bike, and a racing bike. Data on sales and expenses for the past quarter follow: Total Dirt Bikes Mountain Bikes...
?? A local college is deciding whether to conduct a campus beautification initiative that would imvolve various projects, such as planting trees and remodeling bulidings, to make the campus more...
A company has net income of $196,000, a profit margin of 9.7 percent, and an accounts receivable balance of $135,370. Assuming 70 percent of sales are on credit, what is the companys days sales in...

Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each

Question:

Population 1 12 3 8 5 Population 2 14 7 7 9 6

Step by Step Answer:

a When the actual data are given and s 2 must be calculated the calculation is done by using yo...View the full answer

Introduction To Probability And Statistics

Students also viewed these Statistics questions