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An airline reports that it has been experiencing a 17% rate of noshow on advanced reservations. among 150 advanced reservations, find the probability that there will be fewer than 20 no shows.
Carry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
the mean noise level in the 171 ward areas was 58.0 decibels and the population standard deviation is 4.8. find the
A statistician wants to estimate the mean weekly family expenditure on clothes. He believes that the standard deviation of the weekly expenditure is $125.
what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
A certain type of tomato seed germinates 90% of the time. A backyard farmer planted 25 seeds. What is the probability that exactly 20 germinate?
The following data are from an independent-measures experiment comparing two treatment conditions. Do these data indicate a significant difference between the treatments
If the opinion poll had announced the margin of error for 80% confidence rather than 95% confidence, this margin of error would be?
Suppose we wish to test the hypothesis H0: = µ2 vs. H1: = µ≠2 We find a two sided p-value of .03 and a 95% CI for µ of (1.5, 4.0) Are these two results possibly compatible? Why or why not?
What is a simple but legitimate power analysis formula? I am trying to do qualitative research on African American HS boys in the Midwest.
A geologist has collected 10 specimens of basaltic rock and 10 specimens of granite. The geologist instructs a laboratory assistant to randomly select 15 of the specimens for analysis.
At the 0.01 significance level can we conclude that there is a higher proportion of absenteeism among afternoon employees? Compute the value of the test statistic.
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