Question

1. Assume you have two independent samples having the same sample size. If the variance for...

1. Assume you have two independent samples having the same sample size. If the variance for the first sample is 50 and the variance for the second sample is 40, then the pooled variance for these two samples is 45.

True /False

2.

An F test for the equality of two population variances can be a two-tailed test or a one-tailed test.

True

False

3.

A Chi-Square test is often used to determine if there is a significant relationship between two continuous variables.

True

False

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. You have an independent-measures study where your first sample has an SS = 36 and...
1. You have an independent-measures study where your first sample has an SS = 36 and your second sample has an SS = 24. a. If your sample size for both samples is n = 5, find the sample variances and compute the pooled variance. b. On the other hand, if your samples have difference sample sizes, n1 = 5 and n2 = 13. Again, calculate the two sample variances and your pooled variance. c. Compare your answers from part...
Assume you are conducting a 2 independent samples t-test with the following information SAMPLE 1 SAMPLE...
Assume you are conducting a 2 independent samples t-test with the following information SAMPLE 1 SAMPLE 2 SAMPLE SIZE (n) 30 25 SAMPLE MEAN 42 39 The pooled estimate of the common variance is 18. What is the value of the test statistic, tc ? Include 2 decimal places in your answer.
E. Using the same data, assuming that they are independent sample and not paired. Using SPSS,...
E. Using the same data, assuming that they are independent sample and not paired. Using SPSS, the outcome of the data analysis as follow. Independent Samples Test Levene’s Test for equality of variances t-test for equality of means 95% Confidence Interval of the difference F Sig. t df Sig.(2-tailed) Mean Difference Std. Error Difference Lower Upper Test score Equal variances assumed 0.153 0.700 1.215 18 .240 5.200 4.280 -3.793 14.193 Equal variances not assumed 1.215 17.694 .240 5.200 4.280 -3.804...
In a two-tailed hypothesis test of the difference between two means based on independent random samples,...
In a two-tailed hypothesis test of the difference between two means based on independent random samples, the first sample had 30 observations with a mean of 40 and a standard deviation of 4. The second sample had 20 observations with a mean of 45 and a standard deviation of 5. Find the test statistic.
consider the following results frmo two independent random samples taken from two populations. assume that the...
consider the following results frmo two independent random samples taken from two populations. assume that the variances are NOT equal. Population 1 population 2 sample size 50 50 sample mean 35 30 sample variance 784 100 a) what is the "degrees of freedom" for these data? b) what is the 95% confidence interval difference of the population means?
3. There is a different t distribution for every hypothetical sample size. True or False 2....
3. There is a different t distribution for every hypothetical sample size. True or False 2. For a chi-square test, if the observed number of cases in your sample fits what you expect given your knowledge of the population, you would reject the null hypothesis. True or False 1. A two-tailed hypothesis will have more statistical power than a one-tailed hypothesis. True or False
Two random samples are selected from two independent populations. A summary of the samples sizes, sample...
Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given below: n1=45,n2=40,x¯1=50.7,x¯2=71.9,s1=5.4s2=10.6 n 1 =45, x ¯ 1 =50.7, s 1 =5.4 n 2 =40, x ¯ 2 =71.9, s 2 =10.6 Find a 92.5% confidence interval for the difference μ1−μ2 μ 1 − μ 2 of the means, assuming equal population variances.
A. Two independent samples have means of M1 = 15 and M2 = 12, with variances...
A. Two independent samples have means of M1 = 15 and M2 = 12, with variances of s21 = 4 and s22 = 8. If the pooled variance is computed to be s2p = 6, which of the following could be the sample sizes for each of the samples? Group of answer choices n1 = 30 and n2 = 5 n1 = 5 and n2 = 30 It CANNOT be any of these n1 = 10 and n2 = 10...
Question 10.25 pts If you are using SPSS to conduct a two independent samples t-test, examining...
Question 10.25 pts If you are using SPSS to conduct a two independent samples t-test, examining the impact of your independent variable of "smoking status" (smoker vs. non-smoker) on your dependent variable of "number of cavities reported in a 3 year period", the variable of "number of cavities reported in a 3 year period" would be your identified "Grouping Variable" in the Independent Samples T-Test pop up box. True False Flag this Question Question 20.25 pts If SPSS reports a...
From a sample of size 50, we have that Sxx=450 and Syy=800. Having tested the hypothesis...
From a sample of size 50, we have that Sxx=450 and Syy=800. Having tested the hypothesis that there is a negative relationship between two variables (i.e., H0:β1≤0), we obtain a p-value of 0.01186. A. calculate the slope
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT