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A random sample of 41 children (all 5 years of age) was selected and given the Reading test of the WRAT (Wide Range Achievement Test). The sample mean was 20.57 and the estimated standard error of the mean was 1.98. Test whether the sample could be representative of a population whose mean was 23.52. Report the t-value, whether you accept or reject Ho, and whether the difference was significant in a brief sentence.
The standard deviation of the differences d for the paired sample data s d = ____________
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
Find a 95% confidence interval for the mean daily caloric intake. Interpret this interval.
If p denotes the p -value of the corresponding hypothesis test, which of the following is true?
Which of the following is the appropriate conclusion from carrying out these multiple comparisons
Carry out the global test of hypothesis to find out whether any of the regression coefficients are not equal to 0. Use.05 level of significance.
Compare the two forecasts computed in (a) and (b), using MAD. Which one should the dealer use for January of the next year?
What was the success probability of each O-ring?
In an analysis of variance problem involving 3 treatments and 10 observations per treatment, SSE = 399.6. The MSE for this situation is:
Multiple comparison procedures are going to be done using the Bonferroni method with α = 0.10. The value of t** is 2.2426. The smallest minimum significant difference (MSD) for finding a difference between groups is computed as 17.68. The correct ..
Test to see if the mean cell phone bill has changed since 2004. Use a .05 level of significance for the test.
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