A pizza delivery chain advertises that it will deliver your pizza in 40 minutes from when the order is placed. Being a skeptic. you decide to test and see if the mean delivery time is actually more than 40 minutes. For the simple random sample of 6 customers who record the amount of time it takes for each of their pizzas to be delivered, the mean is 48.2 minutes with a standard deviation of 10.6 minutes. Assume that the population distribution is approximately normal. Perform a hypothesis test using a 0.10 level of significance.

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A: Mean is 20.4 and the standard deviation is 6.5.

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Q: For a population With a mean of 75 and a standard deviation of 12, what is the probability that a…

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Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

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Q: Traveling between two campuses of a university in a city via shuttle bus takes, on average, 31…

A: P(X>30)=1-Pz<30-311045=1-P(z<-0.67)=1-0.2514=0.7486

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Q: Assuming weights of female athletes are normally distributed with a mean of 140 lbs and a standard…

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Q: In a recent​ year, the scores for the reading portion of a test were normally​ distributed, with a…

A: Given that, Mean = 22.9 Standard deviation = 6.7

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A: Given:

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Q: If the mean is two, the standard deviation is one, and a value for a normally distributed random…

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Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

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A: State the hypotheses.

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A:

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Q: A chemical engineer processes 20 pilot batches and has the following active ingredient yield…

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Q: An electrical appliance made by company A has an average life of 2500 hours, with a standard…

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Q: For a normally distributed random variable with mean 44 and standard deviation 16, find the…

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Q: The consumer board’s alternative hypothesis is:

A: Here use basic of how to define null and alternate hypothesis

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…