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Construct a confidence interval of the population proportion at the given level of confidence.
x=540?, n=1100?, 95?% confidence.
What is the lower bound of the confidence interval?
Find the probability that between 7 and 9 defective toys are produced in a lot. Find the probability that between 7 and 9 defective toys are produced.
Suppose a random sample of parents with children not yet in high school was obtained. Each was asked how much they spent per child for summer 2014 activities.
a recent survey compared the monthly incomes of electrical engineers with that of civil engineers. a sample of 13
Blood pressure. A company held a blood pressure screening clinic for its employees. The results are summarized in the table below by age group and blood.
Write the equation of the regression line.- Explain what the y-intercept of the regression line indicates.- Interpret the slope of the regression line.
For the following data calculate the mean and standard deviation for the sample. Then calculate both a 95% and a 99% confidence interval for the popular mean.
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Find the sample mean and sample standard deviation for the amount of unspent money returned at the end of the day.
A test of the null hypothesis Ho:U=Uo gives test statistic z= -0.78. Round to four decimal places.
Ha: µ?10 a sample of n=50 observations possessed mean =10.7 and standard deviation s =2.6. Find and interpret the? p-value for this test.
In a sample of n = 36 selected from a population, where X = 96 and S = 12, what is the value of tSTAT if you are testing the null hypothesis H0: µ = 100.
if you sample 100 people and 20 turn out to be over 65 inches tall, you get $20. Which is better: a sample of size 100 or a sample of size 1,000? Choose one and explain. Does the law of averages relate to the answer you give?
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