Question

Assume that the random variable X is normally distributed, with mean mu equals 53 and standard deviation sigma equals 11. Compute the probability. Be sure to draw a normal curve with the area corresponding to the probability shaded. Upper P left parenthesis Upper X less than or equals 40 right parenthesis Which of the following shaded regions corresponds to Upper P left parenthesis Upper X less than or equals 40 right parenthesis? A. X 4053 A normal curve has a horizontal axis labeled "X" with two labeled coordinates, "40" and "53." The normal curve is slightly above the horizontal axis at the left edge of the graph, rises from left to right at an increasing and then decreasing rate to its peak at 53, the graph's horizontal center, and falls from left to right at an increasing and then decreasing rate to be slightly above the horizontal axis at the right edge of the graph. Two vertical line segments run from the horizontal axis to the curve, where one is at 40, to the left of the normal curve's peak, and the other is at 53. The area under the curve to the left of the left vertical line segment is shaded. B. X 4053 A normal curve has a horizontal axis labeled "X" with two labeled coordinates, "40" and "53." The normal curve is slightly above the horizontal axis at the left edge of the graph, rises from left to right at an increasing and then decreasing rate to its peak at 53, the graph's horizontal center, and falls from left to right at an increasing and then decreasing rate to be slightly above the horizontal axis at the right edge of the graph. Two vertical line segments run from the horizontal axis to the curve, where one is at 40, to the left of the normal curve's peak, and the other is at 53. The area under the curve to the right of the left vertical line segment is shaded. C. X 4053 A normal curve has a horizontal axis labeled "X" with two labeled coordinates, "40" and "53." The normal curve is slightly above the horizontal axis at the left edge of the graph, rises from left to right at an increasing and then decreasing rate to its peak at 53, the graph's horizontal center, and falls from left to right at an increasing and then decreasing rate to be slightly above the horizontal axis at the right edge of the graph. Two vertical line segments run from the horizontal axis to the curve, where one is at 40, to the left of the normal curve's peak, and the other is at 53. The area under the curve between the vertical line segments is shaded. Upper P left parenthesis Upper X less than or equals 40 right parenthesisequals nothing (Round to four decimal places as needed.)

Answer #1

Assume that the random variable X is normally distributed, with
mean mu equals 53 and standard deviation sigma equals 11. Compute
the probability. Be sure to draw a normal curve with the area
corresponding to the probability shaded. Upper P left parenthesis
Upper X less than or equals 40 right parenthesis Which of the
following shaded regions corresponds to Upper P left parenthesis
Upper X less than or equals 40 right parenthesis? A. X 4053 A
normal curve has a...

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Upper P left parenthesis Upper X greater than 39 right
parenthesis
LOADING...
Click the icon to view a table of areas under the normal
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Click to view page 1 of the Standard Normal Table.
LOADING...
Click to view page 2 of the Standard Normal Table.
LOADING...
z=?z=?0x0.47380.4738
A normal curve is over a horizontal x-axis and is centered on 0.
Vertical line segments extend from the curve to the horizontal axis
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When asked whether marriage is becoming obsolete,742 out of 2089
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Report and interpret the correct p-value.
Choose the correct graph below.
A.
A graphing calculator output...

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page 1 of the table. LOADING... Click to view page 2 of the table.
LOADING... z=? z=? 0 x 0.0250 0.0250 A normal curve is over a
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The lengths of human pregnancies are normally distributed
with
muμequals=266
days and
sigmaσequals=16
days. Complete parts (a) and (b)
below.
(a) The following figure represents the normal curve with
mu equals 266μ=266
days and
sigmaσequals=1616
days. The area to the
leftleft
of
Upper X equals 235X=235
is
0.02630.0263.
Provide an interpretation of this area. Choose the correct answer
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B.The proportion of human pregnancies that last
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To test Upper H 0: muequals20 versus Upper H 1: muless
than20, a simple random sample of size nequals17 is obtained from
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Find the area of the shaded region. The graph depicts the
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