Use 2 decimal the e age of vets in error of her mean to be 0.21 years. How many

Question

Use 2 decimal the e age of vets in error of her mean to be 0.21 years. How many vets is she kind of accuracy? be sure to round up: you can't survey part of a person) Click here to open the The change in temperature during the fall fluctuates randomly each day, with mean of-1, and a standard deviation of a)ou decide to randomly pick 7 days and note the change in temperature. What is the probability that the average of your sample will be postive? applet b)You don't like the answer to part a, so the random sanele again, thi, time of 36 days. Now what is the probablity that the average of your sample ndl be positive? Click here to open the n applet t-io, 2402) in pounds. Tomorrea at 6:26pm thero wil be 4 namas on the west Laran me weit trinie bndot nia eotapes i, there t,e0pounor oregre on it. A random tarna's-eigie- that the bridge will collapse. what is the probability?(hint, what would the mean be)

Explanation / Answer

10) as std error =std deviation/(n)1/2

hence n=(std deviaiton/std errror)2 =(12/0.21)2 =~ 3266

11)

a)

b)

for normal distribution z score =(X-)/ here mean=       = -1.000 std deviation   == 4.00 sample size       =n= 7 std error=x=/n= 1.5119 probability = P(X>0) = P(Z>0.66)= 1-P(Z<0.66)= 1-0.7458= 0.2542

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