Let the mean test score be 80 and standard deviation be 10.
Find probability that you will get a score higher than 90.
Find the probability that you will receive a score between 75
and 90.
Find the probability that you will receive a score less than
60
Please explain more, thanks!
Test the claim that the mean IQ score of Statistics professors
is greater than 118. Assume that you have the following sample
data:
n = 50 teachers
x = 120
s = 12
significance level = 0.05
Find the indicated z score. The graph depicts the standard
normal distribution with mean 0 and standard deviation 1. Click to
view page 1 of the table. LOADING... Click to view page 2 of the
table. LOADING... z0.9812 A graph with a bell-shaped curve, divided
into 2 regions by a line from top to bottom on the right side. The
region left of the line is shaded and is labeled 0.9812. The
indicated z score is ___.
Find the indicated z score. The graph depicts the standard
normal distribution with mean 0 and standard deviation 1. Click to
view page 1 of the table. LOADING... Click to view page 2 of the
table. LOADING... z0.9817 A graph with a bell-shaped curve, divided
into 2 regions by a line from top to bottom on the right side. The
region left of the line is shaded and is labeled 0.9817. The
indicated z score is nothing. (Round to two...
1) Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1 (0.9616)
2) Find the area of the shaded region. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. The shaded area is z=0.98 to the left.
You wish to test the claim that the standard deviation is
greater than 1.9 at a level of significance of 1%. You select a
random sample of 18 people and find the standard deviation is 2.7.
Assume this is a normal distribution. compute the value of the
standardized test statistic. round answer to thousandths place.
9. For a standard normal distribution, what is the probability
that Z is greater than -1.35? Round to four decimals and use
leading zeros.
10. For a standard normal variable, what is the probability that
Z is between -2.00 and -1.00? Round to four decimals and use
leading zeros.
11. For a dataset that follows the standard normal distribution,
what is the probability that Z is between 2.00 and 3.00? Round to
four decimals and use leading zeros.