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A high school counselor needs to specify whether the teenage pregnancy rate at her school is disimilar from the rate nationwide. She knows that the rate nationwide is 15 %. She randomly selects 80 female students from her high school. She serach that 9 out of 80 students are either pregnant now or have been pregnant lastly.a. What statistical test should be used to examine the data? The z test should be used to examine the data.
b. Identify H0 and Ha for this studyHo: p = 0.15Ha: p not equal 0.15
c. Conduct the appropriate analysis z= (phat - p) /sqrt(p*(1-p)/N)z=(9/80 - 0.15)/sqrt(0.15*0.85/80)z= -0.933933
d. Should H0 be devorted? What should the researcher conclude? The Ho can not be rejected or the null hypothesis is not rejected.
A cosmetic store offer at RM245 for a package, consisting of a foundation, a compact powder and a lipstick, which is saving of 15% on the cost of buying the units indiviually. If b
simple problems on partial derivatives
The number ways of choosing 2 boys and 2 girls in a class for a game of mixed doubles is 1620. Then, what is the number of ways of choosing 2 students in the class?
If x and y are two independent random variables then their joint density function is given by The density function f z of the sum of these two variables is given by the c
a) Use divided differences to ?nd the polynomial (in nested form) that interpolates the data b) Add the data point x = 6, y = -20 and hence estimate y for x = 2.
An electronic module is mounted on a machine and is modelled as a single degree of freedom spring, mass, and damper. During normal operation, the module of mass m kg is subject to
y''=2xy/x^2-y^2
A function f(t) is defined as f(t) = p - t for 0 Write down the even extension of f(t) for -p Determine the Fourier cosine series, and hence, calculate the Fourier series approx
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A company's full profit per unit production is given by the function y = -5x 2 +17x-12 where x is the number of items produced (in hundreds) and the y is the profit per unit (in
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