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Nostrana [21]
3 years ago
12

Please help me I have this same class

Mathematics
1 answer:
Anastasy [175]3 years ago
6 0
Uhhh where is it?.......
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A professor of cognitive psychology is interested in the percent accuracy on this memory encoding task among college students. S
andrew11 [14]

Answer:

a) Expected value of the mean = 0.793 percent

b) Standard error = 0.019 percent.

Step-by-step explanation:

Given

mean = μ = 0.793 percent

Standard deviation = σ = 0.114 percent

a) The sample mean is related to the population mean through

μₓ = μ = 0.793 percent

Hence, the expected value of the sample mean = 0.793 percent.

b) The standard error is given as

Standard error = σ/√n

where n = sample size = 36

Standard error = (0.114/√36)

Standard Error = 0.019 percent.

Hope this Helps!!!

8 0
4 years ago
Which of the quadratic functions has the narrowest graph?
charle [14.2K]

Answer:

y=\frac{1}{8}x^2

Step-by-step explanation:

A quadratic function has the formula ax² + bx + c

  • To determine if a graph will be narrow or wide, the leading coefficient, a, will be the factor that determines this
  • The greater the coefficient, the narrower the parabola
  • The lesser the coefficient, the wider the parabola

Here all of the functions are in the form ax²

  • In y=\frac{1}{8}x^{2}, our "a" term is \frac{1}{8}
  • In y = -2x², our "a" term is -2
  • In y = -3x², our "a" term is -3
  • In y=\frac{1}{3}x^{2}, our "a" term is \frac{1}{3}

We can eliminate the two functions with the negative coefficients because they are much smaller than the two functions with the fractions as coefficients, and will therefore open much wider.

We can now compare the two remaining functions, y=\frac{1}{8}x^2 and  y=\frac{1}{3}x^2

  • Giving the two fractions common denominators would turn them into y = \frac{3}{24}x^2 and y=\frac{8}{24} x^2
  • The equation with the larger fraction will be the parabola that is the narrowest. In this case, it is the y=\frac{8}{24} x^2.
  • Therefore, y=\frac{1}{8}x^2 will have the narrowest graph
7 0
3 years ago
Which formula gives the coordinates of the midpoint of the segment connecting points (a, b) and (c, d)?
Vesna [10]

( \frac{x1 + x2}{2} ) \:  \: ( \frac{y1 + y2}{2} )
You don't multiply both of them, it's a coordinate function. There's suppose to be a comma in between
4 0
4 years ago
Read 2 more answers
a new energy drink advertise 182 calories for 6 ounces how many calories are in 21 ounces of the drink? There are ____ calories
liberstina [14]
I think it should be 637
4 0
3 years ago
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A certain rectangular prism has a height of 6 m, a length of 5 m, and a width of 4 m. Give the dimensions of a second rectangula
trasher [3.6K]

Answer:

height = length = width = \sqrt \frac{74}{3}

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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