Test the given claim using the traditional method of hypothesis testing. Assume that the sample has been randomly selected from a population with a normal distribution. Be sure to state the claim, hypotheses, number of tails, draw density curve with critical value(s), test statistic, decision and conclusion. In tests of a computer component, it is found that the mean time between failures is 513 hours. A modification is made which is supposed to increase the time between failures. Tests on a random sample of 10 modified components resulted in the following times (in hours) between failures. 512.     562      561     442 576 590 530     557 520 565At the 0.05 significance level, test the claim that for the modified components, the mean time between failures is greater than 513 hours.

The weights (in pounds) of 30 newborn babies are listed below. Create a box plot for the data.  Be sure to clearly label the 5-number summary. 5.6  5.8  5.8  5.9  6.1  6.1  6.4  6.4  6.5  6.5 6.7  6.7  6.8  6.9  6.9  7.0  7.0  7.1  7.2  7.2 7.4  7.5  7.6  7.7  7.8  8.0  8.1  8.1  8.3  8.6

Use the given information to find the critical t-value used to test the null hypothesis. α = 0.10 for a left-tailed test, n = 18 (Notice this is a t-test!!!)

If one card is drawn from a standard deck, find the probability of getting these results.   State your answers as reduced fractions.  a. 7 b.  Queen or 8 c. Red or Heart

Use the data to create a stemplot.  Use the following columns: stem (tens) and leaf (ones). The following data show the number of laps run by each participant in a marathon. 186  135  155  153  169  148  157  160  153  149  132  156  172  152  139  190

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for each.   The amount of fat in a can of soup.

If Z is a standard normal variable, find the following probabilities. Be sure to draw an appropriate density curve with shading.   a.  The probability Z lies between -0.45 and 3.37.   b.  P ( Z > 1.42 )

A piggy bank has the following breakdown of coins: 25 quarters, 26 dimes, 30 nickels and 10 pennies.    a.  Complete the probability distribution table to show the monetary value of each coin. (4 pts) X P(X)      b.  Find the expected value (mean). (2 pts)

Phosphoric acid, which is one of the acids found in soda, can cause osteoporosis,kidney stones, and other health problems. It is prepared when water is reacted withtetraphosphorous decaoxide. If I owned a soft drink company, and I used 122.50grams  of  P4010 gas and 82 grams of water to produce phosphoric acid,   1. Must write the balanced chemical equation. 4 pts               a) All components listed correctly ( 1.5 pts)               b) proper phases listed ( 1 pts)               c) balanced correctly ( 1.5 pts)   2. Calculate the limiting reactant. 4pts         a) All equations are shown correctly ( 2.0 pts)         b) Units cancel out ( 0.5 pts)         c) correct answer, unit, and significant figures (1.5 pt)   3. How many grams of phosphoric acid could theoretically be made? ( 3.5 pts)         a) Equation shown correctly ( 2.0pts)         b) Units cancel out ( 0.5 pt)         c) correct answer, unit and significant figures (1 pt)          4. What would be my percent yield if I only ACTUALLY made 255 grams of phosphoric acid?  3.5 pts          a) Equation shown correctly ( 2.0 pts)          b) Units cancel out ( 0.5 pt)          c) Correct answer, unit, and significant figures (1.0 pt)   5. In an economic perspective alone, would you invest in my company? Why or why not? ( 1pts)    Must show all the calculations.  Failure to show work will result in no credit, even if the correct answer is given.  Must submit work within 5 minutes of completing the exam.  * All work will be compared to online sources. Any work resembling posted online sources will receive a zero

The HIPAA Security Rule requires covered entities to conduct a risk analysis to identify the risks to electronic PHI. Which of the following is a true statement about risk analysis?