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How do you know the column to use in the t table and z table in statistics with a normal populations. I never seem to get the right column what are the rules?
The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution, with a mean of $70,000 and a standard deviation of $20,000.
If an individual from this age group is selected, find the probability that his or her blood pressure will be between 70 and 95. Assume normal distribution.
The U.S. Commission of Crime wishes to estimate the fraction of crimes related to firearms in an area with one of the highest crime rates in the country.
The availability of venture capital provided by big boost in funds available to companies recent years. According to Venture Economics, 2,000 venture capital disbursements were made in 1999.
Suppose that a sequence of independent tosses are made with a coin lor which the probability of obtaining a head on any given toss is 1/30.
A student wanted to find out the effects of alcohol on reaction time, so he found the reaction time of each subject under both conditions-alcohol and no alcohol.
If a set of paired data gives the indication that the regression equation is of the form μY|x = α · βx, it is customary to estimate α and β by fitting the line
If true explain and if false give an example. a. The significance level of a statistical test is equal to the probability that the null hypothesis is true. b. If the significance level of a test is decreased, the power of the test would be expected t..
An account invested in a money market fund grew from $73,329.23 to $73,627.26 in a month. What was the interest rate to the nearest tenth?
ph in the water is 7 at the .05 significance level. Her alternative hypothesis is that the water does not have a pH of 7. For which p-value will she fail to reject the null hypothesis?
The equation of the least-squares regression line for predicting average number of offspring per female from cone index is
If wages were increased by $1.00, what is the expected effect on the number of complaints received per employee? How can you tell?
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