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I need to know how to use the formula to answer these questions.
The time needed to drive from town A to town B is normally distributed with a mean of 180 minutes and standard deviation of 20 minutes. What is the probability that a person will drive from town A to town B in i) three hours or more, ii) in less than 180 minutes, iii) in more than 140 minutes, iv) in exactly three hours, and v) in less than 2.5 hours?
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
A random sample obtained from a population has a mean of µ=100 and a standard deviation of σ = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean ..
95% confidence interval evaluate for proportion of Americans who believe Abraham Lincoln is United States' most outstanding President is 65% to 75%. If more precise estimate is requested, then confidence level.
A design for 2 treatments has p pairs of blocks. Each block has three plots. In each pair one block has two plots with A and one with B, and the other has two plots with B and a single plot with A.
Evaluate the mean wait time and throughput rate
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
It is impossible to get a negative value for an F -ratio.
Testing for Population mean - determine if there has been a significant change in the population mean.
Find the expected GPA when SAT = 800. Find E (GPA|SAT = 1,400). Comment on the difference.
They decide to sample some fast-food restaurants currently operating to estimate the monthly cost of electricity. They want to be 90% confident of their results and want the error of the interval estimate to be no more than $100.
Critically discuss the probability that more than 175 cable households rate cable companies as good or excellent in quality transmissions?
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