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Solve the following Standard Normal probabilities (to five decimals)
a. P(z > 0.68)
b. P(z > -1.56)
c. P(z
d. P(-1.22
e. P(2.78 > z > -1.08)
f. P(z < -2.34) + P(z > 1.78)
How do you do this? to look up P(z > 0.68) do you change it to 1-P(0<z<.68)?
Test at the 1% significance level whether currently all adult men spend less than 11 hours per week watching sports on tv. Calculate the p-value for this problem and conduct the test using the p-value method.
To report their finding they want to create a 90% confidence interval. What would be the margin error for this confidence interval?
Do the data indicate a significant difference? Test with ∝ = .05.
Use the binomial distribution in the Data Analysis add - in to simulate the distribution of men and women among the next ten arrivals at an emergency room, assuming that, on average, six people out of ten who arrive are men.
Test the manager's claim at 5% and 1% significance level tests.
Give an example of a null and alternative hypotheses. This can be a personal item or something at work. Additionally, identify the Type I and Type II Errors that could occur with your decision-making process.
If two students were selected at random, what is the probability that they would both read at less than 400 words per minute?
Sketch a histogram of these data and give the modal class.
Prepare tables of descriptive statistics (mean, median, Quartiles, IQR, and Standard Deviation) by firm for net profit margin (PROFITS). Discuss.
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
It is asserted that a greater proportion of males (= x 1 ) contribute to charity than females (= x 2 ). A survey of male and female contributors to charity showed that of 900 males surveyed
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