Question

A researcher used an independent sample t test to compare two treatment conditions. He wanted to...

A researcher used an independent sample t test to compare two treatment conditions. He wanted to test whether there is a significant difference between two treatments. Following data were obtained:

Treatment one group: # of participants = 12, sample mean = 55, sample standard dev (s) = 2.83

Treatment two group: # of participants = 12, sample mean = 52, sample standard dev (s) = 2.00

Use 5% significance level. Assume    µ1 and  µ2 are the population means for group one and two respectively.

a) What is null and alternative hypotheses?

b) What is the value of the test statistic?

c) What is the p-value?

d) What is your conclusion?

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
A researcher used an independent sample t test to compare two treatment conditions. He wanted to...
A researcher used an independent sample t test to compare two treatment conditions. He wanted to test whether there is a significant difference between two treatments. Following data were obtained: Treatment one group: # of participants = 12, sample mean = 55, sample standard dev (s) = 2.83 Treatment two group: # of participants = 12, sample mean = 52, sample standard dev (s) = 2.00 Use 5% significance level. Assume    µ1 and µ2 are the population means for group...
Questions 7 to 13 are based on the following problem A researcher used a sample of...
Questions 7 to 13 are based on the following problem A researcher used a sample of n =16 adults between the ages of 40 and 45. For each person, the researcher recorded the difference between the ratings obtained while smiling and the rating obtained while frowning. On average the cartoons were rated as funnier when the participants were smiling, with an average difference of MD = 1.6, with SS = 135. Are the cartoons rated as significantly funnier when the...
1a) A researcher used a sample of n =16 adults between the ages of 40 and...
1a) A researcher used a sample of n =16 adults between the ages of 40 and 45. For each person, the researcher recorded the difference between the ratings obtained while smiling and the rating obtained while frowning. On average the cartoons were rated as funnier when the participants were smiling, with an average difference of MD = 1.6, with SS = 135. Are the cartoons rated as significantly funnier when the participants are smiling ? Use a one-tailed test with...
A researcher wished to compare the average daily hotel room rates between San Francisco and Los...
A researcher wished to compare the average daily hotel room rates between San Francisco and Los Angeles. The researcher obtained an SRS of 15 hotels in downtown San Francisco and found the sample mean x1=$156 , with a standard deviation s1= $15 . The researcher also obtained an independent SRS of 10 hotels in downtown Los Angeles and found the sample mean x2= $143, with a standard deviation s2=$10. Let 1 and 2 represent the mean cost of the populations...
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use...
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use a Hartley’s F-max test to examine this assumption (each group has 6 participants, s2 in group 1 is 20, and s2 in group 2 is 15, set alpha level at .05). Also, how should this researcher estimate the standard error in the independent samples t test?
The following data are from an independent-measures experiment comparing two treatment conditions.                     Treatment 1   &n
The following data are from an independent-measures experiment comparing two treatment conditions.                     Treatment 1          Treatment 2                                                         4                    19                                                        5                    11                                                        12                    18                                                    10                    10                                                10                    12                                                    7                    14 (a) Calculate the mean for Treatment 1 and Treatment 2 (b) What is the Pooled Sample variance? © What is the estimated standard error? (d) Do these data indicate a significant difference between the treatments at the .05 level of    significance? (e) Compute r2 to measure the...
A t-test is generally used to analyze data with _____ level(s), and an ANOVA is generally...
A t-test is generally used to analyze data with _____ level(s), and an ANOVA is generally used to analyze data with _____ level(s). a.            less than two; more than two                b.            one; one or more                c.            two; more than two                d.            more than two; two                If you examined the effect of studying 0, 1, or 2 hours a day on grades, how        would you write the null hypothesis?                a.            µD = 0                b.           ...
A researcher performed a independent sample t test to test whether population mean of one group...
A researcher performed a independent sample t test to test whether population mean of one group is more than the the other. After taking random sample from both groups he calculated the p-value. It was 0.0345. He changed his mind and decided to test for difference of means in two populations. What is the new p- value? a. 0.0345 b. 0.01725 c. 0.069 d. Cannot determine from given information.
The following scores are from an independent-measures study comparing two treatment conditions. (Be sure to include...
The following scores are from an independent-measures study comparing two treatment conditions. (Be sure to include your critical values) a. Use an independent -measures t-test with a = 0.05 to determine whether there is a significant mean difference between the two treatments. b. Use an ANOVA with a = 0.05 to determine whether there is a significant mean difference between the two treatments. You should find that F = t2. Treatment I Treatment II 10 7 N = 16 8...
The following data represent the results from an independent-measures experiment comparing three treatment conditions. Use a...
The following data represent the results from an independent-measures experiment comparing three treatment conditions. Use a spreadsheet to conduct an analysis of variance with α=0.05α=0.05 to determine whether these data are sufficient to conclude that there are significant differences between the treatments. Treatment A Treatment B Treatment C 12 12 16 12 11 18 12 13 15 11 14 17 13 15 19 F-ratio = p-value = The results obtained above were primarily due to the mean for the third...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT