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Music streaming services are the most popular way to listen to music. Data gathered over the last 12 months show Apple Music was used by an average of 1.71 million households with a sample standard deviation of 0.57 million family units. Over the same 12 months Spotify was used by an average of 2.24 million families with a sample standard deviation of 0.31 million. Assume the population standard deviations are not the same.
Using a significance level of 0.10, test the hypothesis of no difference in the mean number of households picking either service.
a. Find the degrees of freedom for unequal variance test
b. State the decision rule for 0.10 significance level: H0: μApple = μSpotify; H1: μApple ≠ μSpotify.
c. Compute the value of the test statistic
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