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A business major wants to determine whether the variation in advertising costs of hair salons is different from the variation in advertising costs of nail salons. He surveys several businesses and finds the standard deviation in monthly advertising costs is $23 for 12 hair salons, and $43 for 8 nail salons.
What is the test value for this hypothesis test?
Test value: Round your answer to two decimal places.
At the 0.05 level of significance, what is the critical value?
Critical value: Round your answer to two decimal places.
most credit cards require that you pay a minimum monthly payment of two percent of the balance. based upon a balance of
What is the probability that 25% or fewer male employees will indicate that they have to pick up the slack for moms working flextime?
past experience has shown that on the average only 1 in 10 wells drilled hits oil. let x be the number of drillings
Set up H0 and Ha for testing whether the true percentage of TV viewers who find cable news to be better quality than network news differs from 50%.
Suppose that the number of accidents occurring in an industrial plant is described by a Poisson distribution with an average of one accident per month. Let x denote the time (in months) between successive accidents.a Find the probability that the ..
In a study shop, a set of data was collected to determine whether or not the proportion of defectives produced. Determine if the proportion of defectives is the same for all three shifts.
Could rejecting the null hypothesis actually be a positive thing in an experiment or test? Please provide and example with your thoughts. Could you think of a situation where rejecting the null hypothesis does not mean the alternative hypothesis is ..
find the probability density function for a normal random variable with a mean of 15 and a standard deviation of
items produced by a manufacturing process are supposed to weigh 90 grams. the manufacturing process however is such
Verify that this is valid density function. Find out probability that weight is smaller than 24 ounces.
you have just received an inheritance of 10000 and you decide that you should invest the money rather than blow it on
the following observations show the number of traffic violations given for speeding on the one interstate highway going
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