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A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars completely. A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounces. Is there enough evidence to support the consumers conjecture at a=0.05.
a. First, indentify the alternative and the null hypotheses.b. Secondly, calculate the critical value and the df.c. Next, use the appropriate formula.d. Finally, decide whether or not to reject the null hypotheses.
Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected. What is the probability that the sample contains exactly 4 minorities?
Descriptive statistics for each of the four variables along with a discussion of what the descriptive statistics tell us about the motion picture industry?
A new industrial oven has just been installed at the Piatt Bakery. To develop experience regarding the oven temperature, an inspector reads the temperature at four different places inside the oven each half hour.
Write a hypothesis that you might test to compare two or more samples in your example. Indicate which hypothesis test you would use and the samples you would select.
A new car is designed to run a mean of at least 50 000 kilometers before its first tune-up. Tests with 30 cars show a sample mean of 49 500 kilometers and a sample standard deviation of 1000 kilometers.
Cholesterol was 186 milligrams with s = 19.0 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs.
The boys with certificates of recognition. What time would the boys need to beat in order to earn a certificate of recognition from the fitness association?
Suppose that you're charged with comparing results of standardized tests from four different school districts. What statistical technique would you choose to use?
Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
use the normal approximation to the binomial to determine what is the probability that: 100 or more murder are committed with a firearm? a. 0.452 b. 0.548 c. 0.367 d. 0.164.
Is global F ratio significant? Identify this F ratio, and describe whether it is important.Is coefficient for X1 (productivity) significant? How do you know? Mention its t value and accompanying P-value.
State the number of degrees of freedom that are associated with each of the following extra sum of squares and why this is the case:
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