A bank manager wants to know the mean amount of mortgage paid per month by homeowners in an area. A random sample of 119 homeowners selected from this area showed that they pay an average of $1574 per month for their mortgages. The population standard deviation of such mortgages is $219. a. Find a 95% confidence interval for the mean amount of mortgage paid per month by all homeowners in this area. Round your answers to two decimal places. eTextbook and Media to i dollars b. Suppose the confidence interval obtained in part a is too wide. Select all of the ways the width of this interval can be reduced. O Lowering the confidence level O Increasing the sample size O Increasing the confidence level O Lowering the sample size

Q: Of 500 random people surveyed, 72 were smokers.  Find the 95% confidence interval. SE=0.0157

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Q: In a survey, 15 people were asked how much they spent on their child's last birthday gift. The…

A: given data  n = 15x¯ = 39s = 980% ci for μ. find ME = ?

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Q: . Estimate the mean with an approximate 95% confidence interval. The magazine estimates the true…

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Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

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