You conduct an experiment on 36 subjects which yields a sample mean of 35 with a...

You conduct an experiment on 36 subjects which yields a sample mean of 35 with a standard deviation of 5. Using that data, what is the 95% Confidence Interval for the mean of your sample’s population?

Describe the difference between statistical significance and effect size.

How is each used in describing the results of an experiment?

What is Statistical Power?

What are 3 ways of increasing power in an experiment? Explain why each method increases statistical power

Expert Solution

Solution includes confidence interval for mean,power,sample size, significance,effect size interpretation.pl?☺️

orchestra answered 1 year ago

A sample of 36 dishwashers yields a mean replacement time of 11.5 years. Given that σ...

A sample of 36 dishwashers yields a mean replacement time of 11.5 years. Given that σ =2.6, find the margin of error in estimating μ at the 98% level of confidence. Round to one decimal place.

If, for a sample in which the subjects are randomly chosen, the mean income is $45,000,...

If, for a sample in which the subjects are randomly chosen, the mean income is $45,000, the sample size is 1600, the standard deviation is $4,000, and the standard error of the mean is $______, what, approximately, is the 95% confidence interval for the population mean? (show all work) (a) $41,000 to $49,000. (b) $37,000 to $53,000. (c) $44,800 to $45,200. (d) It is impossible to know, because we do not know if the incomes are normally distributed.

Suppose you have a sample of 36 observations with the sample mean = 2 and the...

Suppose you have a sample of 36 observations with the sample mean = 2 and the sample standard deviation = 7. Compute the t-statistic corresponding to these values for the null hypothesis that mean = 0. Test two-sided alternative hypothesis that mean 6= 0. Do you reject the null hypothesis at p = 0:05? At p = 0:01? If the sample size is reduced to 25, do you get the same conclusions?

16. Suppose you run a between-subjects experiment in which 11 subjects are randomly selected from the...

16. Suppose you run a between-subjects experiment in which 11 subjects are randomly selected from the same parent population. 5 subjects are assigned to the control group and 6 subjects are assigned to the experimental group. The subjects in the experimental group are given an experimental drug that is supposed improve their coordination. After giving the experimental group the drug, you measure the coordination of all 11 subjects on a scale for which a higher score means better coordination. The...

150 subjects in a psychological study had a mean score of 36 on a test instrument...

150 subjects in a psychological study had a mean score of 36 on a test instrument designed to measure anger. The standard deviation of the 150 scores was 12. Find a 98% confidence interval for the mean anger score of the populations from which the sample was selected. Select one: a. (34.1, 37.9) b. (33.5, 38.5) c. (33.7, 38.3) d. None of other answer is necessary true.

n order to conduct an experiment, 5 subjects are randomly selected from a group of 49...

n order to conduct an experiment, 5 subjects are randomly selected from a group of 49 subjects. How many different groups of 5 subjects are possible?

A sample of size 20 yields a sample mean of 23.5 and a sample standard deviation...

A sample of size 20 yields a sample mean of 23.5 and a sample standard deviation of 4.3. Test HO: Mean >_ 25 at alpha = 0.10. HA: Mean < 25. This is a one-tailed test with lower reject region bounded by a negative critical value.

A random sample of 36 subjects who identified themselves as compulsive buyers was obtained and given...

A random sample of 36 subjects who identified themselves as compulsive buyers was obtained and given a questionnaire. They had a mean questionnaire score of 0.59 with a standard deviation of 0.12. Test the claim that the population of self-identified compulsive buyers has a mean greater than the mean of 0.56for the general population. Use a 0.05 significance level.

For a random sample of 36 data pairs, the sample mean of the differences was 0.8....

For a random sample of 36 data pairs, the sample mean of the differences was 0.8. The sample standard deviation of the differences was 2. Test the claim that the population mean of the differences is different than 0 using alpha at .05. State the null and alternative hypotheses (.5 points) What is the formula you will use? (.5 points) Identify all variables and corresponding values from the formula. Calculate the test statistic. (2 points) Sketch the distribution, label the...

2008 2007 Sample Size 36 36 Sample Mean 75.0000 70.7500 Sample Standard Deviation 17.2891 8.7843 df...

2008 2007 Sample Size 36 36 Sample Mean 75.0000 70.7500 Sample Standard Deviation 17.2891 8.7843 df 51 Confidence Interval (in terms of 2008 - 2007) Confidence Coefficient 0.80 Lower Limit 0.0535 Upper Limit 8.4465 Hypothesis Test (in terms of 2008 - 2007) Hypothesized Value 0 Test Statistic p-value (Lower Tail) p-value (Upper Tail) p-value (Two Tail) 2008-2007 Sample Size 36 Sample Mean 4.2500 Sample Standard Deviation 20.2969 Confidence Interval (in terms of 2008 - 2007) Confidence Coefficient 0.80 Lower Limit...

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