Question

The
reading speed of second grade students in a large city is
approximately normal, with a mean of 88 words per minute (wpm) and
a standard deviation of 10 wpm.

What is the probability that a random sample of 10 second
grade students from the city results in a mean reading rate of more
than 94 words per minute?

(Round to four decimal places as needed)

Answer #1

Let denotes the mean reading rate for a random sample of 10 second grade students from the large city.

or

The probability that a random sample of 10 second grade students from the city results in a mean reading rate of more than 94 words per minute

The reading speed of second grade students in a large
city is approximately normal, with a mean of 89 words per minute
(wpm) and a standard deviation of 10 wpm. Complete parts (a)
through (f).
(a) What is the probability a randomly selected student in the
city will read more than 94 words per minute?
The probability is ___ (Round to four decimal places as
needed.)
(b) What is the probability that a random sample of 13 second
grade students...

1. The reading speed of second grade students is approximately
normal with a mean of 90 words per minute (wpm) and a standard
deviation of 10 wpm. A. What is the probability a randomly selected
student will read more than 95 words per minute? B: What is the
probability that a random sample of 12 second grade students
results in a mean reading rate of more than 95 words per minute? c:
What is the probability that a random sample...

1-4. The reading speed of second-grade students
is approximately normal, with a mean of 90 words per minute (wpm)
and a standard deviation of 12 wpm.
1. What is the z-score for a
second-grade student who reads 100 wpm?
2. What is the probability a randomly
selected second-grade student will read more than 100 wpm?
3. What is the reading speed of a
second grader whose reading speed is at the 90th percentile?
Please Show all work!!

The reading speed of second graders is approximately normal,
with a mean of 90 words per minute and a standard deviation of 10
words per minute.
a) Find the probability a random sample of 25 students would have a
mean reading speed of more than 95 words per minute?
b) Find the probability a random sample of 25 students would have a
mean reading speed between 85 and 90 words per minute

Studies have shown that for all second grade students the
average reading speed is 90 words per minute with a standard
deviation of 10 words per minute. You take a sample of 34 second
graders and compute their average reading speed. What is the
probability that the average reading speed is between 95 and 100
words per minute?
a) Define a random variable to be used in the problem. State the
distribution of this variable, perform all necessary checks, and...

A teacher is interested in determining the mean reading speed
(in words per minute) of second grade students in her city. She
took a random sample of 25 second grade students from her city, and
calculated a 95% confidence interval to be (82, 98). The data from
the 25 students appeared roughly unimodal and symmetric.
Select the correct interpretation of this interval in
the context of the problem.
Group of answer choices
We are 95% confident that 95% of samples...

Given a mean if 92 words per minute and a standard
deviation of 10 wpm
There is a 5% chance that the mean reading speed of
a
random sample of 24 second grade students will exceed what
value?

In the sixth grade of a school there are 35 students. The school
principal considers that the reading speed of the students has
approximately a normal distribution, with an average speed of 125
words per minute and a standard deviation of 24 words per
minute.
a. How many sixth graders will have a reading speed greater than
130 words per minute?
20 children
17 children
15 children
18 children
b. A child is selected at random. What is the probability...

Students who have completed a speed reading course have reading
speeds that are normally distributed with a mean of 950 words per
minute and a standard deviation equal to 200 words per minute. If
10 students are selected at random, what is the probability that at
most two of them would read at less than 850 words per minute?
0.22
0.64
0.36
0.78

the
reading soeed of a sixth-grade student is appoximately normal, with
a mean of 125 words per minute and a standard deviation of 24 words
per minute. of 1000 randomly select sixth-grade students about how
many students reads between 110 and 130 words per minutes?

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