Lv 1124 points

Desi_Boy

Favorite Answers38%
Answers21
Questions31
  • Refer to the following table of descriptive statistics from a randomized placebo-controlled trial:?

    Refer to the following table of descriptive statistics from a randomized placebo-controlled trial:

    Baseline Patient Characteristics

    Characteristics .......... .......Ranolazine (n=3279)........ ........Placebo (n=3281)

    Age, median (IQR), y...... ........64 (55-72)............... ................64 (56-72)

    Age≥75y.............. ....................562/3279 (17.1).............. ........592/3281 (18.0)

    Female Sex.... ........................1106/3279 (33.7)........ ............1185/3281 (36.1)

    White Race.......... ....................3112/3279 (94.9).......... ..........3129/3281 (95.4)

    Weight, median (IQR), kg.......... ....80 (72-92)........... .................81 (71-91)

    BMI, median (IQR)........... ............28 (25-31).............. ..............28 (25-32)

    Comorbidities:

    Diabetes mellitus.......... ............. 1104/3279 (33.7)......... .........1116/3281 (34.0)

    Hypertension............ ......................2395/3257 (73.5)........ .........2409/3258 (73.9)

    Hyperlipidemia ............. ..................2028/3016 (67.2)........... ......2022/2982 (67.8)

    Current Smoker.......... ...................872/3276 (26.6).................. .... 804/3280 (24.5)

    Cardiac History

    Prior MI................ ........................1119/3245 (34.5)........... ...........1095/3251 (33.7)

    Prior coronary revascularization....891/3277 (27.2)......... ..............853/3278 (26.0)

    Prior heart failure........ ...................538/3279 (16.4)........ ..............557/3281 (17.0)

    (Excerpted with permission from Table 1, Morrow et al. Effects of Ranolazine on Recurrent Cardiovascular Events in Patients with Non-ST-Elevation Acute Coronary Syndromes. JAMA 2007; 297: 1775-1783.)

    a. In the table above, what type of variable is the variable “Age, y”?

    b. What type of variable is “Age ≥75 y”?

    c. What statistics are used to describe the central tendency and variability of “Age, y”?

    Median and interquartile range. Mean and standard deviation. Mean and range. Ns and percents.

    d. What statistics are used to describe the variable “Age ≥75 y”?

    Median and interquartile range. Mean and standard deviation. Mean and range. Ns and percents.

    e. What is the median weight in the placebo group (in kg, don't include units)? Please enter the value exactly as pictured in the table.

    f. What percent of participants in the ranolazine (drug) group are male? (format xx.x, don't include % sign)

    g. What percent of participants in the placebo group have hypertension? (format xx.x, don't include % sign)

    h. In the table, how many variables are treated as binary?

    3 AnswersMathematics7 years ago
  • When you flip a coin, there are two possible outcomes Each outcome occurs with equal probability.?

    When you flip a coin, there are two possible outcomes: {0=tails, 1=heads}. Each outcome occurs with equal probability. As an experiment, you flip a coin 100 times, with the following result:

    Outcome Frequency

    0........... ......53

    1.......... .......47

    Total .... ......100

    a. Calculate the mean of your sample data (n=100). Please round to the nearest hundredth (e.g., .xx).

    b. Calculate the standard deviation of your sample data (n=100). Please round to the nearest hundredth (e.g., .xx).

    c. What is the median value? Please enter a whole number.

    d. What is the interquartile range? Please enter a whole number.

    1 AnswerMathematics7 years ago
  • A doctor examines a group of healthy adults and records their respiratory rates.?

    A doctor examines a group of healthy adults (presenting to clinic for their annual physical exams) and records their respiratory rates, shown in the following table.

    Outcome ............... ........... Frequency

    (RR in breaths per minute)

    11................................ ............10

    12................................ ............9

    13................................ ...........11

    14................................ ...........14

    15................................ ...........10

    16................................ .............6

    Total ............................. .............60

    a. Calculate the mean of the sample data (n=60). Please round to the nearest tenth (e.g., xx.x).

    b. Calculate the standard deviation of the sample data (n=60). Please round to the nearest hundredth (e.g., xx.xx).

    c. What is the median value? Please round to the nearest tenth (e.g., xx.x).

    d. What is the interquartile range? Your answer should be a whole number.

    1 AnswerMathematics7 years ago
  • Find the component of a in the b direction.?

    Taking

    a = 4i + 4j, b = i - 3j + 2k, c = 3i + 3k

    Find the component of a in the b direction.

    a) 1/7 sqrt(7)

    b) -4/3 sqrt (2)

    c) -4/7 sqrt (14)

    d) -sqrt (2)

    e) -8/7 sqrt (14)

    f) None of the above.

    1 AnswerEngineering8 years ago
  • Maximize xy^2 on the ellipse 4x^2 + 9y^2 = 36.?

    Maximize xy^2 on the ellipse 4x^2 + 9y^2 = 36.

    a) The maximum is 8√3⁄3

    b) The maximum is 8√6

    c) The maximum is 6

    d) The maximum is 8√3

    e) There is no maximum.

    f) None of the above.

    1 AnswerMathematics8 years ago
  • Maximize xy2 on the ellipse 4x2 + 16y2 = 64.?

    Maximize xy2 on the ellipse 4x2 + 16y2 = 64.

    a) There is no maximum.

    b) The maximum is 32√6⁄3

    c) The maximum is 8

    d) The maximum is 32√3⁄3

    e) The maximum is 32√3⁄9

    f) None of the above.

    1 AnswerMathematics8 years ago
  • Calculate the area of the surface:?

    Calculate the area of the surface:

    z^2 = 2xy

    with 0<=x<=2, 0<=y<=2, 0<=z

    a) 32/3

    b) 32/3 sqrt(2)

    c) 16/9 sqrt(2)

    d) 16 sqrt(2)

    e) 8/3 sqrt(2)

    f) None of the above.

    1 AnswerEngineering8 years ago
  • There are 230 space groups, but proteins isolated from cells can occur in only 65 of them? Why?

    There are 230 space groups, but proteins isolated from cells can occur in only 65 of them? Why?

    1 AnswerBiology8 years ago
  • Express the following as a function of 2 variables:?

    Express the following as a function of 2 variables: The volume of a box with square base and side length x and height y

    a) V(x,y) = (x)(y)

    b) V(x,y) = (x^3)

    c) V(x,y) = (x^2)(y)

    d) V(x,y) = (y^2)(x)

    e) V(x,y) = (x^3)(y)

    f) None of the above

    1 AnswerMathematics8 years ago
  • Anthropology Questions?

    1)All the following apply to humoral/thermal medicine EXCEPT

    a)These systems are often characterized by hot/cold and other binary distinction - i think it is this

    b)These systems usually heal through counteractive methods

    c)There is emphasis upon balance and harmony

    d)The thermal/humoral distinction are always literal

    2)According to Foster, in the contemporary US,

    a)Humoral/thermal medicine is currently taken very seriously by established allopathic biomedical texts

    b)Remnants of humoral/thermal medicinal ideas and treatments may be found in some so-called “folk” cultural knowledge and linguistic expression

    c)There are no harmful practices in humoral/thermal medical treaments

    d)Humoral/thermal medicine is used only by midwives

    3)Much Latin American humoral/thermal medicine can be traced to influence from primarily

    a)The Moors

    b)The Chinese

    c)The Kung/San

    d)All of the above

    4)According to Greenwood, the two main (basic) medical systems of treatment in Morocco are

    a)Prophetic and humoral/thermal - i think it is this

    b)Biomedical and prophetic

    c)Biomedical and humoral/thermal

    d)Ayurvedic and Prophetic

    5)One current critique of the term “culture-bound syndrome” is that

    a)This ignores the real suffering of patients with these conditions

    b)This implies that cultures and their afflictions are isolated - i think it is this

    c)This is racist

    d)This entire concept is non-existent

    1 AnswerAnthropology8 years ago
  • What is the frequency of the heterozygotes?

    In a large randomly mating population of Mexican Red knee Tarantulas, there are two alleles at a single gene that control the number of red spots found in the adult – a dominant 16 spot allele and a recessive 8 spot allele. In this population, 0.49 % of the adult Millipedes have 8 spots (fa/a =0.0049). What is the frequency of the heterozygotes (fA/a)?

    Please show work

    a. 0.065

    b. 0.07

    c. 0.13

    d. 0.500

    e. 0.93

    1 AnswerBiology10 years ago
  • Biochemistry lab question?

    What information might a researcher gain about the NarP protein by examining where the conserved aspartate residues lie?

    As a research scientists, what could you do to test your hypothesis that the regions you thought to play a part in protein function are important to protein function. Suggest an approach to the problem.

    1 AnswerChemistry10 years ago
  • Given the following function, with k as a constant, find the values of k for which f is one-to-one.?

    Given the following function, with k as a constant, find the values of k for which f is one-to-one.

    f(x)=(x^3)-(kx^2)+(4x)

    2 AnswersHomework Help1 decade ago
  • Describe how you would prepare a 1-L aqueous solution of each of the following:?

    a) 1M glycine (MW 75.07)

    b) 0.5M glucose (MW 180.2)

    c) 100mM glucose (MW 180.2)

    2 AnswersChemistry1 decade ago
  • can a woman dye her hair in ramadan?

    can a woman dye her hair in ramadan?

    8 AnswersRamadan1 decade ago
  • interference fringes?

    If the ratio d/a is 5, how many complete interference fringes within the central diffraction peak do you expect to observe?

    What is a missing fringe?

    1 AnswerPhysics1 decade ago
  • physics question about atoms?

    Do all atoms have the same number of neutrons as protons?

    Do most atoms have the same number of neutrons as protons?

    3 AnswersPhysics1 decade ago
  • The discharge curve for a capacitor, C, connected to a series with a resistor.?

    The discharge curve for a capacitor, C, connected to a series with a resistor. (a) After the capacitor is allowed to discharge for a long time what is the potential difference across the capacitor? (b) If the C=0.065F, what is the value of R? (c) If the capacitor is fully charged and then allowed to discharge, how long after discharging begins is needed for the potential difference across the capacitor to reach one third of its starting voltage.

    I figured that (a) would be 0v after it is discharged completely.

    Could someone explain b and c please?

    1 AnswerPhysics1 decade ago
  • In a (transverse) electromagnetic wave, what is oscillating?

    In a transverse wave on a string, the string oscillates: points on the string are displaced vertically from the equilibrium position. In a (transverse) electromagnetic wave, what is oscillating?

    2 AnswersPhysics1 decade ago
  • When current passes through a resistor, it?

    When current passes through a resistor, it

    a. increases.

    b. decreases.

    c. stays the same.

    d. any of the above, depending on the circuit.

    5 AnswersPhysics1 decade ago