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Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Use either the traditional method or P-value method as indicated. Identify the null and alternative hypotheses, test statistic, critical value(s) or P-value (or range of P-values) as appropriate, and state the final conclusion that addresses the original claim.
1) A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.4 g with a standard deviation of 4.2 g. At the 0.05 significance level, test the claim that the sample comes from a population with a mean weight less than 30 g. Use the traditional method of testing hypotheses.
A researcher discovers the number of parking tickets that a group of students have received during their driving careers. Twenty students reply and they have received between 9 and 20 parking tickets.
What method has been used to transform Model 1 to Model 2? Equations for Model 1 and Model 2 are as follows:
List all outcomes corresponding to the five smallest possible values of Y, and state which Y value is associated with each one.
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
Illustrated significant negative relationship between amount of homework assigned and student attitudes. Determine the explanatory variable and explain the response variable?
assume there are 18 homes in the quail creek area and 9 of them have a security system. four homes are selected at
Is there evidence to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.
the line width of for semiconductor manufacturing is assumed to be normally distributed with a mean of 0.5 micrometer
A sample size of 900 is not large enough to conclude that the sampling distribution of p is a normal distribution, when the estimate of the population proportion is 0.995 and the standard deviation of all possible sample proportions increases as th..
Select a method for graphically representing the provided date Use the method to create a graph analyze the date and provide a narrative description of my analysis.
Be certain to mention the direction of the relationship, the strength of the relationship, and whether our findings are statistically significant
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