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The question is : Find the confidence interval by estimating the population proportion for the following: alpha= 0.09 n=365 p-hat = 0.50. I know the formula should be p-hat +/- z(alpha/2)*square root (p-hat*q-hat/n), but I'm not sure how to find the z value and get the answer
What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?
A researcher is studying IQ levels. From past experience she knows the population mean IQ for adults is 110 and the standard deviation is 15.
In this the anniversary of the sinking of the Titanic, it is interesting to look at the distribution of those who survived, and those who died. The table below describes the number of men, women and children who were passengers on the Titanic.
What is the probability that all 6 of the households in her city being monitored by the TV industry would tune in to the new show?
Data collected by a child development scientist produced a 95% confidence interval for the mean age, μ (in weeks) at which babies began to craw as [21.4, 31.6]
Approximately normally distributed with a mean of 32 hours and a standard deviation of 2 hours. What percent of the garages take between 30 and 34 hours to erect?
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
This information was also obtained from monitored calls. At the .05 significance level does it take longer to resolve software issues? What is the p-value?
Which of the following events are disjoint and What proportion of the females rated their intelligence less than 7.
Suppose we wish to test the null hypothesis that there are no differences among the proportion of men and women who developed a rash. Evaluate the P-value of the chi-square test of this hypothesis.
A report by the NCAA states that 57.6% of football injuries occur during practices. A head trainer claims that this is too high for his conference, so he randomly selects 36 injuries and finds that 17 occurred during practices. Is his claim correc..
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
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