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Assume the null hypothesis is that μ = 50 and that the graph shown below is the sampling distribution of the mean (M). Would a sample value of M= 60 be significant in a two-tailed test at the .05 level? Roughly what value of M would be needed to be significant?
if we have a 95 confidence interval we have alpha2 below the confidence interval and alpha2 above the confidence
Explain why it makes sense for a set of data to have a correlation coefficient of zero when the data show a very definite pattern.
If an occupation does not require a state-issued license for its practice, can it be considered a profession? Explore some examples that might fall into this category. Are there alternative ways for occupations to elevate their status without prof..
Describe the sample space ?. What is the probability that three tosses will be required?
Using the scatter diagram (no calculations), would you estimate the linear correlation coefficient to be positive, close to zero, or negative?
A random sample of 28 executives gives x = 6.7 years and s = 2.4 years. Give a 99% con?dence interval for the average number of years of experience for all executives in this branch.
it is known that 20 of the applications received for a particular credit card are rejected. what is the probability
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
payoff insurance company charges a customer according to his or her accident history. a customer who has had no
The probability that a new advertising campaign will increase sales is assessed as being 0.60. The probability that the cost of developing the new ad campaign can be kept within the original budget allocation is 0.50.
The trial of the pyx. In 1150, it was recognized in England that coins should have a standard weight of precious metal as the basis for their value. A guinea, for example, was supposed to contain 128 grains of gold. (There are equivalent to the su..
consider the experiment of drawing two cards from a shuffled deck and then getting them back where success is now
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