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1. a) What is a normal distribution? _________________
b) What does the pnorm() function do?_________________________
2. If you know the mean and standard deviation of a normally distributed population, and somebody asks you questions about the highest 1% and lowest 1% of numbers in that population, what could you tell them? Pick your own values for the mean and standard deviation and then answer the question for those values. Choose one of these R functions to answer the question: dnorm(), pnorm(), qnorm(), rnorm().
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
In a Gallup poll done in 2007, a randomly selected sample of n = 254 U.S. parents was asked how often the television was on when they ate dinner as a family.
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 of 1,000? Choose one and explain. Does the law of average relate to the answer you give?
Is there any evidence of a change in the performance of the lamps between the dates - If there is a difference, calculate the 95% confidence limits for the difference.
"Strategizing for the future" is management lingo for sessions that help managers make better decisions.- Test the effectiveness of the program, using α = 0.05.
Describe the mean difference that is the main effect for the treatment. Describe the mean difference that is the main effect for gender. Is there an interaction between gender and treatment? Explain the answer
Continuing Problem 8.4.9, in the mapping of the bit sequence b2b1b0 to the symbols si, we wish to determine the probability of error for each input bit bi. Let qi denote the probability that bit bi is decoded in error.
What are the effects of training group (blue, red or yellow group) and gender on work performance scores? Provide the IV, DV, Covariate, and best method of analysis.
The data comes from a set of scores on a 50 point Bilogy 101 test. 90 subjects took the test. The scores range from 12-50. How to make a simple frequency distribution table, using the raw data?
a market research study is being conducted to determine if a product modification will be received well by the public.
for each of the following statements give the null hypothesis ho and the alternate hypothesis h1.1. the mean
Under what situations must the nonparametric test be used? Describe in detail. Write down the strengths and weaknesses of nonparametric tests?
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