Real mean difference in interval

Assignment Help Mathematics

Reference no: EM1319833

Question: A developmental psychologist would like to determine how much fine motor skill improves for children from age 3 to age 4. A random sample of n = 15 three year old children & a second sample n = 15 four year old are obtained. Each child is given a manual dexterity test that measures fine motor skills. The average score for the children was M = 40.6 with SS = 430 & the average for the younger children was M = 35.4 with SS = 410. Using these data,

[A] Make an interval estimate so you are 99% confident that the real mean difference is in your interval.

[B] Based on your answers from b & c, do these data indicate a significant change using a two-tailed test with alpha=.05? Is the difference significant with alpha=.01?

[C] Make a point estimate of the population mean difference in fine motor skills

[D] Make an interval estimate so you are 95% confident that the real mean difference is in your interval.

Reference no: EM1319833

Questions Cloud

Find the sample mean : ow large a sample must be selected if he wants to be 99 percent confident of finding whether the true mean differs from the sample mean by 2.5 hours?

Determine the mean oil production with 95 percent confidence : Determine the mean oil production with 95 percent confidence

Find the confidence interval for the population mean : Find the confidence interval for the population mean

Make an interval estimate of the mean : Make an interval estimate of the mean so that you are 90 percent confidant that the true mean is in your interval.

Real mean difference in interval : Real mean difference in interval

Determine any significant differences among the treatments : Use an ANOVA with alpha=.05 to determine whether there are any significant differences among the three treatments.

Independent measures research study : Independent measures research study.

Fill all missing values : The given table presents the results from an ANOVA comparing three treatment conditions with n=12 participants in each condition. Fill all missing values.

Apply an anova with alpha : Apply an ANOVA with alpha

User Account

All Pages