An automotive researcher wanted to estimate the difference in distance required to come to a complete stop while traveling 40 miles per hour on wet versus dry pavement. Because car type plays a role, the researcher used eight different cars with the same driver and tires. The breaking distance (in feet) on both wet and dry pavement is shown in the data below. Car 1 2 3 4 5 6 7 8 Wet 107 101 109 112 105 106 111 108 Dry 72 69 74 73 76 75 78 81 a) Construct a 99% Confidence Interval for the mean difference in stopping distance between wet and dry roads. b) Test whether there is a difference in stopping distances between wet and dry roads at 1% level of significance.

Is there a relationship between the dollars spent each week on recreation and the number of members of the family? Do larger families spend more on recreation? Ten Chicago families shared the following information:

Family Size               3         6        5        6        6        3        4         4         5        3

Amount Spent          99        104     151     129     142     111     74        91        119     91

h. Predict the recreational spending for a family of size 5.

i. If there are families of that size in the data set, what are the residuals for those observations?

j. Test the explanatory power of the model at a 5% level of significance.

k. Test if there is a positive relationship between family size and recreational spending. Use alpha = 0.01.

l. What is the excel command used to produce the p-value associated with the test in part k?

3. A distinguishing characteristic of entrepreneurs is their willingness to take risks. R.H.Brockhaus (Academy of Management Journal, Sept. 1980) used a choice dilemma questionaire (CDQ) to measure the risk-taking propensities of successful entrepreneurs (lower scores associated with a higher tendency for risk taking). The CDQ scores are normally distributed with a mean of 72 and a standard deviation of 8.

(a) What is the probability that a randomly selected entrepreneur will score between 68 and 74 on the CDQ? Final answer in 4 decimals.

(b) What CDQ score differentiates the 30.5% entrepreneurs most willing to take risks from the rest

(c) Suppose a random sample of 5 entrepreneurs are selected, what is the likelihood that the average CDQ score of these 5 entrepreneurs is between 70 and 72? Use the standard normal table and express your final answer in 4 decimals.

An emergency service wishes to see whether a relationship exists between the outside temperature and the number of emergency calls it receives for a 7-hour period. The data are shown. Emergency Calls and Temperatures Temperature x 68 74 82 88 93 99 101 No. of calls y 7 4 8 10 11 9 13

a. Describe the linear relationship between the temperature and the number of calls.

b. Calculate the correlation coefficient, r.

c. Is r statistically significant at the 0.05 level. Explain.

d. Determine the equation of the line of best fit.

e. Calculate and interpret the coefficient of determination, 2 r .

f. Predict the number of calls when the temperature is 80degrees.

g. Predict the temperature outside when the number of calls is 6.

h. Predict the number of calls when the temperature is 59 degrees

1. Group A has three scores, 32, 23, 16. Group B has three scores, 23, 35, 11. Group C has three scores, 49, 37, 42. Calculate the F-value. Round to one digit.

1 points   

QUESTION 9

1. Group A has three scores, 11, 26, 22. Group B has three scores, 16, 28, 33. Group C has three scores, 21, 36, 25. Calculate the grand mean (round to two digits).

1 points   

QUESTION 10

1. Group A has three scores, 24, 36, 29. Group B has three scores, 45, 50, 12. Group C has three scores, 18, 27, 10. Calculate MS effect (Mean squared error for the Effect). Round to one digit.

A patient is a 74 years old white male presented in the emergency room with a chief c/o right flank pain radiating to the lower abdomen associated with painful, burning urination and a foul smelling urine. Patient denies fever or chills. A urinalysis was done which showed a 3+ bacteria with a positive nitrite and elevated WBC. Intravenous pyelogram showed a 6.5 mm kidney stone in the right ureter. The patient is being treated with broad spectrum intravenous antibiotic and was scheduled for lithotripsy. Formulate a nursing care plan for this patient based on the problems presented. Provide a minimum of 3 (three) nursing problems.

Question three

1. Describe the term simulation
2. Explain the advantages and disadvantages of simulation techniques
3. Solve the following transportation problem using any suitable method. The cell entries are unit costs

                        Required                     16        18            20         14          14

A researcher is looking at the relationships between age and the number of instances of shoplifting. Use the data below to establish hypotheses and calculate the correlation for the relationship between age and shoplifting. State and explain your decision with regard to whether the H₀ is ultimately rejected or accepted.

A 150-V battery is connected across two parallel metal plates of area 28.5 cm² and a separation of 8.20 mm. A beam of alpha particles (charge +2e, mass 6.64E-27 kg) is accelerated from rest through a potential difference of 1.75 kV and enters the region between the plates perpendicular to the electric field.

What magnitude and direction of magnetic field are needed so that the alpha particles emerge undeflected from between the plates?