Question: Find the pooled variance for two populations with the following sample sizes and sample variances. n1 = 9, n2 = 15, s21 = 2.5, s22

Find the pooled variance for two populations with the following sample sizes and sample variances.
n1 = 9, n2 = 15, s21 = 2.5, s22 = 3.5. Compare with the value in Exercise 5.

Step by Step Solution

★★★★★

3.47 Rating (163 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Because the two sample sizes are not equal we ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

808-C-L-D (1674).docx

120 KBs Word File

Students Have Also Explored These Related Calculus Questions!

In a one-factor ANOVA with sample sizes n1 = 5, n2 = 7, n3 = 6, n4 = 7, n5 = 5, the test statistic was Fcalc = 2.447. (a) State the hypotheses. (b) State the degrees of freedom for the test. (c) What...

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 (1 - 2),...

In Figure, where n 1 = 1.70, n 2 = 1.50, and n 3 = 1.30 light refracts from material 1 into material 2. If it is incident at point A at the critical angle for the interface between materials 2 and 3,...

2. Describe what is measured by the estimated standard error in the bottom of the independentmeasures t statistic. 4. One sample has SS= 60 and a second sample has SS=48. a. If n=7 for both samples,...

11) A sample tested the claim that heights oi men and heights ot women have diiterence variances, with s = 7.41435 cm for women and 7.15449 cm for men. The sample sizes are HI = 145 and n2 = 151....

Calculate the 95% confidence interval for the difference between the mean Anger-In score for the athletes and non-athletes. What can you conclude? Learning Objectives State the assumptions for...

1) A research assistant wants to compute a two-independent sample t test. He determines the sample size for both are n1 = 15 and n2 = 25. If he was to compute the estimated standard error for the...

Independent random samples were selected from two normally distributed populations with means m1 and m2, respectively. The sample sizes, means, and variances are LO3 shown in the following table....

Q1 - Independent random samples were selected from two quantitative populations, with sample sizes, means, and variances given below. Population 1 2 Sample Size 39 46 Sample Mean 9.4 7.3 Sample...

Answer Exercise 6.3.22 when the roller at node 4 only allows it to move in the vertical direction. Exercise 6.3.22 (a) Construct the reduced incidence matrix and the equilibrium equations in this...

gmol.K) (30 p). 2. Maltase enzyme is added to 1 m volume of solution with 0.4 kgmol/m concentration at 30C. When maltose is enzymatically hydrolyzed, 2 moles of glucose are produced from 1 mol of...

Work Assignment 6 Intermediate Corporation earmed $ 4 6 , 2 4 0 , 2 5 0 in calendar ( and fiscal ) year 2 0 2 4 . The company has the following Stockholders' Equity Section as of January 1 , 2 0 2 4...

Two different types of two-sample t tests are the ___-samples t test and the ___-samples t test.

For the simple regression model yi = + i, i ~ N [0, 2], prove that the sample mean is consistent and asymptotically normally distributed. Now consider the alternative estimator = i wi yi, wt =...

In the discussion of the instrumental variables estimator we showed that the least squares estimator b is biased and inconsistent. Nonetheless, b does estimate something: plim b = = + Q1. Derive...

For the model in (5-25) and (5-26), prove that when only x* is measured with error, the squared correlation between y and x is less than that between y* and x*. (Note the assumption that y* = y.)...

a A local firm reports 7,500 bonds outstanding with a face value of $1,000 each, a market value of $1,025 each, and a coupon rate of 6.5 percent. The interest is paid semiannually. What is the amount...

Answer correctly. Original solution. Don't guess The General Mills Company (GMC) purchased a milling machine for $90,000, which it intends to use for the next five years. This machine is expected to...

Use the following probability distribution. a) Find the expected rate of return on Stock X. (3 pts) b) Find the expected rate of return on Stock Y. ( 3 pts) c) Find the standard deviation of Stock X....