What percentage of hospitals provide at least some charity care? based on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing at least some charity care): 56.9 55.9 52.6 66.2 59.0 64.7 70.1 64.7 53.5 78.2 assume that the population of x values has an approximately normal distribution. (a) use a calculator with mean and sample standard deviation keys to find the sample mean percentage x and the sample standard deviation s. (round your answers to one decimal place.) x = 6212 % s = 8.1 % (b) find a 90% confidence interval for the population average μ of the percentage of hospitals providing at least some charity care. (round your answers to one decimal place.) lower limit % upper limit %

Step-by-step explanation:

1) a) x = 62.2 % s = 8.0 % b) lower limit 58.1% upper limit 66.4% 2) a) x = 64.2 crimes per 1000 people s = 27.9 crimes per 1000 people b) lower limit 58.9 crimes per 1000 people upper limit 69.4... i think this is your answer

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

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