Using the problem in number 12. State the test statistics.

A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1500 hours. A homeowner selects 40 bulbs and finds the mean lifetime to be 1480 hours with a population standard deviation of 80 hours. Test the manufacturer’s claim. Use alpha equal to 0.05. State the sample mean and the population standard deviation.

Using the problem in number 6. Choose the correct hypotheses.

(15 points) The hyperbolic cosine function is defined as cosh(x)=ex+e-x2. Find the length of the curve  cosh(x)=ex+e-x2 over the interval [0,1].

According to the National Sleep Foundation, how many hours of sleep per night do adults need?

Which of the following is an appropriate indication for PICC placement in an infant?

Find the P-value for the hypothesis test with the standardized test statistic z. Decide whether to reject H0 for the level of significance α.  Right-tailed test, z = 0.52, α = 0.05

A group of 49 randomly selected students has a mean age of 22.4 years. Assume the population standard deviation is 3.8. Construct a 98% confidence interval for the population mean.

Sucking reflex is:

Which act imposed prison sentences for up to 20 years for those people who were found guilty of aiding the enemy, obstructing recruitment of soldiers, or encouraging disloyalty?