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After an ANOVA that compares four treatments, you calculate a separate two-sample t 95% confidence interval for each pairwise difference formed from the four population means. Are you 95% confident that these intervals capture all the true differences?
(a) No, because 95% confidence applies to each interval alone, not to all the intervals together.
(b) No, because the ordinary two-sample t confidence intervals cannot be used for a difference between two population means when we have data from other populations as well.
(c) Yes, because under the ANOVA conditions, following the t procedure gives correct 95% confidence intervals.
A survey of the number of calls received by a sample of Southern Phone Company subscribers last week revealed the following information.
Solve the equation for x (by taking the logarithms of both sides): All the other exercises have x on the same side (left) so this one has thrown me.
the fill volume of an automated filling machine used for filling cans of carbonated beverage is normally distributed
The results of a published research study indicated that babies fed on breast milk gained an average of 11 ounces per week; babies fed a powdered instant baby formula gained an average of 2 ounces per week.
When the rats In the sample reach 10 weeks old, each rat is weighed. The mean weight for this sample is M=974. Sketch the appropriate distribution, and locate the critical region for the alpha level =.05.
Then you travel the same distance to another point C moving at a constant speed of 120 km/h. Your average speed for the entire trip from A to C is?
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Use a P-value to test the claim about the population mean using the given sample statistics. State your decision for a=0.05. Claim: mean does not = 230
The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year.
a researcher has developed a new drug designed to reduce blood pressure. in an experiment 21 subjects were assigned
Airplaneflight during the last year. If we take a random sample of 40 adults, the probability is 0.37 that the sample proportion is greater than what number.
in order to provedisprove the null hypothesis that there is no salary discrimination you obtain random samples of male
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