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In this question are you just using the empirical rule?
You know that your population is normally distributed with a mean of 100 and a standard deviation of 15. Using the empirical rule as a rough approximation, what is the probability that a score selected at random is
Above 100
Below 85
Below 130
question a research study performed at checkout lines at publix supermarket in south florida revealed that between 4pm
Ten years ago, an advertising agency took a random sample of 20 personal computer owners who used brands such as Dell, Gateway, Hewlett-Packard, etc. At the time, the agency recorded a satisfaction score, with a maximum of 100 possible points.
Bring to mind a research question that interests you, or a current event that utilizes statistics to present results, that you can use as an example for this discussion. State the research question or the current event and results.
If 700 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?
In the past the average length of an outgoing telephone call from a business office has been 143 seconds. A manager wishes to check whether that average.
What is the amount by which we will be off on average when predicting values for the dependent variable using the regression model?
Sum the numbers of students in each row and each column, and put these sums into your table. Also put the total number of students in the lower right corner.
If the tool manufacturer would like to be 95% confident that the sample proportion is within 0.01 of the actual population proportion, how many machinery rebuilding and repairing companies should be included in the sample?
A coin tossed 100 times and 530 heads appear. At a=0.05, test the claim that this is a non biased coin. Use a P-Value. does this suggest the coin is fair?
If heads is a success when we flip a coin, getting a six is a success when we roll a die, and getting an ace is a success when we draw a card from an ordinary deck of 52 playing cards, find the mean and the standard deviation of the total number o..
The standard deviation of their rents is $80. (a) What is the standard error of the mean? (b) What are the degrees of freedom for a one-sample t statistic?
Diversification Is considered Important in finance because it allows investors to reduce risk by investing in a variety of assets.
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