Here are the red blood cell counts (in 106 cells per microliter) of a healthy pe

Question

Here are the red blood cell counts (in 106 cells per microliter) of a healthy person measured on each of 15 days 5.4 5.1 4.9 5.3 5.6 5.2 5.5 5.2 5.0 5.3 5.2 4.8 5.4 5.2 5.1 Find a 95% confidence interval estimate of , the true mean red blood cell count (in 106 cells per microliter) for this person during the period of testing. (Round your answers to three decimal places Please provide all 10 cells per microliter to 10° cells per microliter may need to use the apropriate appendix table or technology to answer this questionthe steps and do Need Helpf-Read it- Talk to a Tutor not use excel to find std. dev!!!! #2 -/10 points My Notes Ask Your Teacher You want to rent an unfurnished one-bedroom apartment for next semester. You take a random sample of 10 apartments advertised in the local newspaper and record the rental rates. Assume the rental rates are normally distributed. Here are the rents (in dollars per month) 345, 310, 395, 315, 695, 335, 315, 355, 310, 390 Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community

Explanation / Answer

#1.
Sum of given numbers = 76
mean (xbar) = 76/15 = 5.09

Variance = sum ((xbar - x)^2)/(n-1)) = 0.2407

std. dev. = sqrt(0.2407) = 0.4906

n = 15

mean = 5.09

t-value of 95% CI = 2.1448

std. dev. = 0.4906

SE = std.dev./sqrt(n) = 0.1267

ME = t*SE = 0.2717

Lower Limit = Mean - ME = 4.8217

Upper Limit = Mean + ME = 5.3650

95% CI (4.8217 , 5.365 )

#2.

Sum of given numbers = 3765

mean (xbar) = 3765/10 = 376.5

Variance = sum ((xbar - x)^2)/(n-1)) = 13505.83

std. dev. = sqrt(13505.83) = 116.2146

n = 10

mean = 376.5

t-value of 95% CI = 2.2622

std. dev. = 116.2146

SE = std.dev./sqrt(n) = 36.7503

ME = t*SE = 83.1349

Lower Limit = Mean - ME = 293.3651

Upper Limit = Mean + ME = 459.63492

95% CI (293.3651 , 459.6349 )

x (x-xbar)^2 5.4 0.09404 5.1 0.00004 4.9 0.03738 5.3 0.04271 5.6 0.25671 5.2 0.01138 5.5 0.16538 5.2 0.01138 5 0.00871 3.5 2.53871 5.2 0.01138 4.8 0.08604 5.4 0.09404 5.2 0.01138 5.1 0.00004

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