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A manufacturer claims that the mean lifetime of its lithium battery is 1500 hours. A homeowner selects 40 batteries and finds the mean lifetime to be 1490 hours with a standard deviation of 80 hours. Test the manufacturer’s claim. Use α= 0.01.

A survey of 1010 college seniors working towards an undergraduate degree was conducted. Each student was asked, “Are you planning or not planning to pursue a graduate degree?” Of the 1010 surveyed, 658 stated that they were planning to pursue a graduate degree. Construct and interpret a 98% confidence interval for the proportion of college seniors who are planning to pursue a graduate degree.

The number of violent crimes committed in a day possesses a distribution with a mean of 3.8 crimes per day and a standard deviation of 2 crimes per day.  A random sample of 100 days was observe, and the mean number of crimes for the sample was calculated.  Describe the sampling distribution of the sample mean.  

When doing a C section, it is important to have the bitch or queen in a deep plane of anesthesia.

In order to efficiently bid on a contract, a contractor wants to be 95% confident that his error is less than two hours in estimating the average time it takes to install tile flooring. Previous contracts indicate that the standard deviation is 4.5 hours. How large a sample must be selected?

A client calls. “My Schnauzer just ate 3 pieces of Russel Stover candy. They are about 1 ounce each. I heard chocolate is toxic to dogs. Do I need to worry? My dog weighs 20 lbs, I know she is overweight. I have tried to put her on a diet but she keeps stealing food from the other dogs! She is about 5 years old.” What is your biggest concern.

The Golden Rule of emergency medicine is to treat the most life threatening problem first.

Some Potentially Useful Information:   Amino Acid     pK1a-COOH               pK2a-amino                pKR side chain gly                   2.34                             9.60                             — ser                    2.21                             9.15                             13.6 glu                   2.19                             9.67                             4.25 asp                   1.88                             9.60                             3.65 lys                    2.18                             8.95                             10.53 arg                   2.17                             9.04                             12.48 his                    1.82                             9.17                             6.00 val                   2.32                             9.62                             — pro                   1.99                             10.96                           — met                  2.28                             9.21                             — ile                    2.36                             9.68                             — leu                   2.36                             9.60                             — phe                  1.83                             9.13                             — asn                   2.02                             8.80                             — trp                    2.38                             9.39                             —                      cys                   1.96                             10.28                           8.18   ∆G=∆H-T∆S ∆G = ∆H-T∆S ΔG = ΔG΄˚ + RT ln Q ΔG΄˚ = – RT ln Keq ∆H = Hbonds broken – Hbonds formed E = Q1Q2e2/Dr

Is the bolded statement TRUE or FALSE? Tertiary and quaternary structures are the final levels of protein structural hierarchy. Which of the following statement(s) is (are) true given these topics? 51. Subunits are held together by non-covalent forces to make up the quaternary structure of a protein. 52. The hydrophobic core of a globular protein forms when two subunits with hydrophobic interfaces come together. 53. Non-covalent interactions between amino acids side chains within a single tertiary structure only form between amino acids close to each other in the primary structure. 54. Quaternary structures can consist of no more than 7-subunits.55. The quaternary structure of a protein can be formed by subunits of identical primary structure or differing primary structures.

Typical signs seen and described by an owner during a seizure include 3 of the following: