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Question: A government agency wishes to estimate the proportion of drivers aged 16-24 who have been involved in a traffic accident in the last year. It wishes to make the estimate to within one percentage point and at 90% confidence. Find the minimum sample size required, using the information that several years ago the proportion was 0.12.
five samples of the material were tested in a structure and the average interior temperature reported was as follows
1. For the data of Example, ?nd the variance in?ation factors, and comment on their relative magnitudes. 2. Find the correlation between X1 and X 2 for the data of Example 11-1 pre- sented in Table 11-1. Is multicollinearity a problem here? Also ?n..
Test whether there is a difference in the mean of times men and women and determine the p-value.
Construct a 95% CI for the proportion of households with family history of heart disease, separately for each race. Would you say the proportion of households with history of heart disease differ by race?
If a single test is run and indicates that oil is present,what is the revised probability that oil is actually present.
a study looks at patients who were mechanically ventilated in the intensive care unit. the researchers found that of
A random sample of 100 observations is obtained from a normally distributed population with a standard deviation of 10. What is a 95% confidence interval for the mean of the population if the sample mean is 40?
The DA team has now assessed the probability of FTC approval from Davood to be p = 0.5. Currently, MobAd is asking for $2 Billion to sell itself.
normal distribution if the mean per capita income in the u.s. is 39000 and the standard deviation is 5000 - what
Calculate the maximum bending stress in a W530×101 steel beam that spans 13 m on simple supports and supports two equal concentrated loads of 54 kN each.
Redo the calculations for the significance test and the confidence interval under the following assumptions, and summarize the effects of the sample sizes on the results.
three experiments investigating the relation between need for cognitive closure and persuasion were performed. part of
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