Reference no: EM13247120
1. Studies have found suicide rates to vary by location.The table below shows the teen births per 1,000 women age 15-19 in 6 states for2006.
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States
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Teen birth rateper1,000
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Alabama
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53.5
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California
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39.9
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Colorado
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45.8
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Nevada
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55.8
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New Hampshire
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28.7
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New York
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25.7
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Texas
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63.1
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Washington, DC
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48.4
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a) Mean ______________________
b) Median position ______________
c) Median value ________________
d) Mode ______________________
2. Use this frequency distribution of hours studied in the past week by students to answer the questions below.
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Hours Studied in a Week
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F
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10
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1
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9
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0
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8
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2
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7
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4
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6
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7
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|
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5
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11
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4
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5
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|
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3
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3
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|
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2
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4
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1
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2
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0
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1
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Total
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a) Fill inthecolumns in thetablebelow (as needed)
b) Calculate the Mean ____________________
c) Calculate the Variance _________________________
d) Calculate the Standard Deviation ___________________
e) What does this Standard Deviation Mean? ____________________________________________
3. Provide an experimental and null hypothesis that describes the mean weight loss for men versus women in a biggest loser contest.
Null -
Experimental -
4. In a test of the hypothesis that females smile at others more than males do, females and males were videotaped while interacting and the number of smiles emitted by each sex was noted. Using the following number of smiles in the 5-minute interaction, use a t-test to determine if the null hypothesis that there are no sex differences in the number of smiles is true.Use .05 p-value to determine significance.
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MALES (Group A)
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FEMALES (Group B)
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8
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15
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11
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19
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13
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13
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4
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11
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2
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18
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7
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17
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9
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10
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9
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7
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6
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4
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a) T-ratio _________________________________________
b) df (degrees of freedom) ___________________________________
c) What is the Research/Alternative Hypothesis (two-tailed)?
d) Should the null hypothesis be rejected?
5) A sports psychologist was interested in testing the effect of a simple relaxation technique on college basketball players' free throw shooting accuracy. Each player was asked to shoot 20 consecutive free throws and the number of successful attempts was recorded. The players were then trained to use a simple 5 second relaxation technique while preparing to shoot a free throw. The players then returned to the court and shot 20 consecutive free throws again. The resulting data are given below:
Number of Free Throws Completed Per Twenty Attempts
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pre
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Post
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12
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13
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15
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15
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9
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11
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16
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15
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12
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15
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15
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18
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17
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17
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10
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12
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12
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13
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14
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17
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a. What is the appropriate t-test to conduct?___________________________________
b. T-ratio ______________________________________
c. df (degrees of freedom) __________________________
d. Should the null hypothesis be rejected? Use .05 p-value to determine significance.
e. Please state your findings in one sentence
Attachment:- Assignment.rar
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Complete the general education task
: A local bank claims that the waiting time for its customers to be served is the lowest in the area. A competitor bank checks the waiting times at both banks.
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Estimate the worst-case varation in film thickness
: A wafer 100mm in diameter is mounted in an electron-beam evaporation system in which the spherical radius is 40cm. Use Eq. 6.7 to estimate the worst-case varation in film thickness between the center and edges
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Calculate both doping densities in p-n junction
: A silicon (ni= 10^10 cm^-3) p-n junction diode has a maximum electric field of -10^6 V/cm and a depletion layer width of 1 um. The acceptor density in the p-type region is four times larger than the donor density in the n-type region.
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Find direction of magnetic field in soft iron bar
: A soft iron bar is sitsting surrounded by two separate loops of wire. The loop on the left, L1, initially has a current flowing clockwise as viewed from the right, What will be direction of magnetic field in soft iron bar
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What is the appropriate t-test to conduct
: What is the appropriate t-test to conduct and should the null hypothesis be rejected
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Determine parameters of the equivalent circuit
: Rated voltage is applied to the low voltage winding and the high voltage winding is open-circuited. Under this condition, the current into the low voltage winding is 2.4 A, and the power taken from the 2400 V source is 3456 W.
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Find the direction of induced current flowing in the loop
: A single loop of wire is lying in the plane of a paper, What will be the direction of the induced current flowing in the loop
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Determine vemf and draw the polarity with a sketch
: the z-axis carries a 10mA current in the +z direction. A second line of current parallel to the first is located at x= 0, y=3cm carrying a 10 mA current in the -z direction. A rod exists in the y-z-plave from y= 1cm to y= 2 cm. velocity u = 2m/s z..
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Explain iron oxide reacts with carbon to give iron
: Iron(III) oxide reacts with carbon to give iron and carbon monoxide; Fe2O3(s)+3C(s)-->2Fe(s)+3CO(g). a) How many grams of C are required to react with 2.50 mol of Fe2O3
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