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The producers of a new toothbrush claim that it prevents more cavities than other brands of toothpaste. A random sample of people used the new toothpaste for 6 months. The mean number of cavities at the next checkup is 1.5. In the general population, the mean number of cavities at a 6 month check-up is 1.73 (α - 1.12).
a) Is this a one - or two tailed test?
b) What are H0 and Ha for this study?
c) Compute Z obt.
d) What is Z cv?
e) Should H0 be rejected? What should the researcher conclude?
f) Determine the 95% confidence interval for the population mean, based on the sample mean.
How many defectives do you need to find (or more) in a sample of 20 so that you will shut down the line. You want to be 95% sure that there is a real problem beyond random noise before you shut down the line.
Illustrate out the Socratic method? What is it designed to do? Try to illustrate this method with a concrete example.
The genes dumpy wings, clot eyes, and apterous wings are linked on chromosome II of Drosophila. In a series of two-point mapping crosses, the genetic distances demonstrate below were determined.
What assumption about the population distribution is needed in order to conduct the t test in (a)?
Consider a big life decision you've made in the past or anticipate making in the future. Now analyze that decision in light of the following:
Write specifications for method which advances any given date by one day. Write a statement of purpose, pre- and post-conditions, and description of the parameters.
For the composite areas shown first determine the centroids and second determine the moment of inertia with respect to the centroidal axes Ixc and lyc.
Discuss how do cells sense chemoattractants or chemorepllents? Be specific about the molecules involved. Is the cytoskeleton remodeled during cytokinesis?
What justification does Habermas offer for his critique of Gadamer's hereneutical approach to society and social science? Is Habermas's approach more justified than Gadamer's or other approaches?
A company is deciding if it should design an advertising system for use on Twitter. The first option is to skip out on designing, with no net costs or gains.
Find out best decision, by using following decision criteria.
Findout the consumption level separating the bottom 45% to the top 55%. The September energy consumption levels for single family homes are found to the normally distributed with a mean
Store used ANOVA to test if mean sales for each credit card were equal. What are the degrees of freedom for F statistic?
How would the General Counsel's decision in Part (b) change if the cost of selling the second suit were only $200,000? What if the cost were $900000?
Find the range and the standard deviation of the times.
Calculate sample proportion and then also calculate a 99% confidence interval for true population proportion, p.
According to table, which presents a MODI solution for a transportation problem, if that solution is used, which of the following is true.
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
Determine regression equation. Use assets as independent variables. For fund with $400.0 million in sales, determineut five-year rate of return (in percent).
For monthly volume of 300 tables, find out total cost, total revenue and profit.
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
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