Question

Using a = 0.05, test for a difference in the means. group         n        mean       sample std...

Using a = 0.05, test for a difference in the means.
group         n        mean       sample std dev
1                20       8.3                 3.0
2               20       7.2                  3.0
ttest u1 = u2 ( VS NE) t= 1.16

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
ttest age == 56 One-sample t test ------------------------------------------------------------------------------ Variable | Obs Mean Std. Err. Std. Dev....
ttest age == 56 One-sample t test ------------------------------------------------------------------------------ Variable | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval] ---------+-------------------------------------------------------------------- age | 2,857 49.15576 .3310101 17.69279 48.50671 49.8048 ------------------------------------------------------------------------------ mean = mean(age) t = -20.6768 Ho: mean = 56 degrees of freedom = 2856 Ha: mean < 56 Ha: mean != 56 Ha: mean > 56 Pr(T < t) = 0.0000 Pr(|T| > |t|) = 0.0000 Pr(T > t) = 1.0000 State the null hypothesis, would you reject or accept...
Question 3: Independent-Samples t-Test Group Statistics type of school N Mean Std. Deviation Std. Error Mean...
Question 3: Independent-Samples t-Test Group Statistics type of school N Mean Std. Deviation Std. Error Mean reading score public 168 51.8452 10.42279 .80414 private 32 54.2500 9.19677 1.62578 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means F Sig. t df Sig. (2-tailed) Mean Difference Std. Error Difference 95% Confidence Interval of the Difference Lower Upper reading score Equal variances assumed .564 .453 -1.217 198 .225 -2.40476 1.97519 -6.29986 1.49034 Equal variances not assumed -1.326...
4. Group Statistics protestant N Mean Std. Deviation Std. Error Mean HIGHEST YEAR OF SCHOOL COMPLETED...
4. Group Statistics protestant N Mean Std. Deviation Std. Error Mean HIGHEST YEAR OF SCHOOL COMPLETED .00 1260 13.32 3.219 .091 1.00 745 13.62 2.810 .103 Using this information a) Conduct an independent samples t-test for these means b) Find the effect size
3. Group Statistics newengland N Mean Std. Deviation Std. Error Mean HIGHEST YEAR OF SCHOOL COMPLETED...
3. Group Statistics newengland N Mean Std. Deviation Std. Error Mean HIGHEST YEAR OF SCHOOL COMPLETED .00 1937 13.38 3.073 .070 1.00 81 14.72 2.955 .328 a) Conduct an independent samples t-test for these means
Null hypothesis (H0): The true difference in mean hemoglobin change for pregnant women not exposed to...
Null hypothesis (H0): The true difference in mean hemoglobin change for pregnant women not exposed to herbicides versus those who are somewhat exposed is 0 g/dL. (µbottle – µboth = 0 g/dL) Research hypothesis (H1): The true difference in mean hemoglobin change for pregnant women not exposed to herbicides versus those who are somewhat exposed is not 0 g/dL. (µbottle – µboth ≠ 0 g/dL) SAS Output: The TTEST Procedure Variable: change group Method Mean 95% CL Mean Std Dev...
Group Statistics Group N Mean Std. Deviation Std. Error Mean DRP Score 1 21 51.48 11.007...
Group Statistics Group N Mean Std. Deviation Std. Error Mean DRP Score 1 21 51.48 11.007 2.402 2 23 41.52 17.149 3.576 An educator conducted an experiment to test whether new directed reading activities in the classroom will help elementary school pupils improve some aspects of their reading ability. She arranged for a third grade class of 21 students to follow these activities for an 8-week period. A control classroom of 23 third graders followed the same curriculum without the...
One-sample t test ------------------------------------------------------------------------------ Variable |     Obs        Mean    Std. Err.   Std. Dev.   [95% Conf
One-sample t test ------------------------------------------------------------------------------ Variable |     Obs        Mean    Std. Err.   Std. Dev.   [95% Conf. Interval] ---------+-------------------------------------------------------------------- alctry | 16,149    991.0647    .0066429    .8441679    991.0517    991.0777 ------------------------------------------------------------------------------     mean = mean(alctry)                                           t = 1.1e+05 Ho: mean = 292.0672                              degrees of freedom =    16148 Ha: mean < 292.0672         Ha: mean != 292.0672          Ha: mean > 292.0672 Pr(T < t) = 1.0000         Pr(|T| > |t|) = 0.0000          Pr(T > t) = 0.0000 Write out the research question and write a short paragraph 3-4 sentences...
Hypothesis Test: Difference Between Means Sample A: 35 Observations, Mean = 10.255, Variance=0.310 Sample B :...
Hypothesis Test: Difference Between Means Sample A: 35 Observations, Mean = 10.255, Variance=0.310 Sample B : 20 Observations, Mean= 9.004, Variance= 0.831 H0: μA – μB= 0 H1: μA – μB ≠ 0 alpha=0.05 Can you run a hypothesis test for the difference between two means?
For each of the following data sets, carry out a one-tailed t-test, with α = 0.05,...
For each of the following data sets, carry out a one-tailed t-test, with α = 0.05, and the alternative hypothesis ????????: U1 > U2 In each case, give the p-value (if applicable) or explain why the data are inconsistent with the alternative hypothesis. State whether or not the null hypothesis is rejected. a) Sample 1: n=10 , mean= 10.8 Sample 2: n= 10, mean= 10.5 df= 18 SE= 0.23 b) Sample 1: n= 100, mean 750 Sample 2: n=100, mean=...
one group of mathematics students took a distance learning class while another group took the same...
one group of mathematics students took a distance learning class while another group took the same course in a regular classroom. the sample data is available in the table below statistic distance . regular Number of students . 40 50 mean scores 30.2 . 42.5 sample std dev 2.4 . 2.5 a) is there a significance difference in the mean scores? test the claim using a= 0.05 significance level b.) construct a 95% confidence interval for the difference between the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT