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Recent Data Science graduates make $115,000 per year on average with a standard deviation of $20,000. A random sample collected data from 300 graduates in Silicon Valley and found an average salary of $119,000. If we wanted to estimate μ with 99% confidence interval with a margin of error of 2000, how large a sample would we have needed?
During the flu season, all 50 were exposed to the flu and 29 actually contracted the disease. Is there any evidence to suggest the claim is false, that the chance of contracting the flu is greater than 44%?
For a data set obtained from a sample of size n = 64 with x bar = 46.25, it is known that Ï = 5.6.
For each score, compute the corresponding z-score and find its percentile rank. Round the z-scores to the nearest hundredth place.
Refer to given Exercise about hours of sleep per night for college students. Draw a picture of the distribution. Indicate the locations of the three intervals found in Exercise. Use given Figure for guidance.
Make a scatterplot of the data for the female subjects. Which is the explanatory variable?
Sort the data by units sold, high to low Sort the units sold using an icon set, where green corresponds to high sales levels, yellow to medium sales, and red to low sales. The sort should show all the green icons first, followed by yellow, and then..
Create a stem-and-leaf plot for these ages.- Create a dotplot for these ages.- Describe the shape of this dataset.
The mean was 56 and the standard deviation was 20. On the second exam, she scored 82; the mean was 74 and the standard deviation was 5. On which exam did she do better?
Having a difficult time finding a health care article that pertains to correlation statistical procedures. I am not even sure what that means.
Using the data from your own survey (see Exercise 5 of Chapter 2) give 95% and 99% confidence intervals for the population mean and total.
when ben looks at the keyboard he sees fingerprints on the following lettersa e f g l o r v yhow many different
1. Discuss what classical artistic traditions are present in these two images. 2. How did the artists of these portraits use color, line, texture and proportion to show the heavenly, divine quality of the subjects?
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