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A husband and wife make their decisions independently of each other, and then they compare their decisions. If they agree, the decision is made; if they do not agree, then further consideration is necessary before a decision is reached. Assume each has a history of making the right decision 70% of the time.
What is the probability that they together make the right decision on the first try?
What is the importance of pretesting questions and instruments? What are risks of not doing this? Provide an example
If the writing scores for the population have a standard deviation of σ = 20, does the sample provide enough evidence to conclude that the new composition course has a significant effect?
Average of this group is 229. Population standard deviation for both groups is 6. At α = 0.01, is there difference in cholesterol levels between two groups?
Research the topic of Job Satisfaction using the Business Source Premier Database (EBSCO) and/or the ABI Inform Global database in the Library using the instructions linked here.
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected? Assume independence.
A sample of 16 batteries reveals a mean of 3.45 years and a standard deviation of 0.3 years. Find a 95% confidence interval for the population mean.
Assume the distribution of ages of homes follow an approximately normal distribution. Show all the seven steps and include the p-value.
A political action committee decided to poll its membership to determine if they were in favor of a certain potential law, similar to gun control.
Drive-up window is six per hour at noon on a typical monday. What percent is closest to the probability that exactly three customers arrive on a given noon hour on a typical monday?
A laboratory tested 70 chicken eggs and found that the mean amount of cholesterol was 229 milligrams with s = 19.9 milligrams. Construct a 95% confidence interval for the true mean cholesterol content of all such eggs.
A random sample of 36 drinks from a soft drink machine has an average content 7.6 ounces with an standard deviation of 0.48 ounces. Test the hypothesis ounces against the alternative hypothesis at the 0.05 level of significance.
What is the mean of the data? What is the median of the data? What is the sample standard deviation of the data?
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