Question

_________% of the scores fall between a z-score of -1.00 and a z-score of +2.00

17.89 |
||

81.85 |
||

48.32 |
||

65.17 |

Answer #1

**We have to find the percentage of the scores that fall
between a z-score of -1.00 and a z-score of +2.00.**

**So, first we find the probability that a randomly
selected score falls between z=-1.00 and z=2.00.**

**So, we find**

**Where, phi is the distribution function of the standard
normal variate.**

**From the standard normal table, this
becomes**

**So, the corresponding percentage is 0.8185*100, ie.
81.85%.**

**So, the correct answer is option (b)
81.85%.**

1. What proportion of scores in a normal distribution lie
between the mean and a z-score of -0.44?
2. What proportion of scores in a normal distribution are
greater than or equal to a z-score of -2.31?

For a normally distributed variable, what proportion would fall
between a z-score of xx and xx?
For a normally distributed variable, what proportion would be
below a z-score of 0.__?
For a normally distributed variable, what proportion would be
below a z-score of -0.__ (note the negative sign)?
For a normally distributed variable, what proportion would be
above a z-score of 0.__?
For a normally distributed variable, what proportion would be
above a z-score of -0._?

What is the z score for scores in the bottom 10%?
What is the z score for scores in the top 2.5%?
please show each step, previous questions show 2.5% is 1.96 but
I have no clue how they go from .025 to 1.96

Use the standard normal (z score) table to find: P(-1.00 ≤
z)
Find the probability that a data value picked at random from a
normal population will have a standard score (z) that lies between
the following pairs of z-values. z = 0 to z = 2.10

Answer the following questions given the z-scores for the
individuals below.
Name
z-score for height
z-score for weight
Gary
0
.10
Harry
-1.00
1.50
Jerry
1.50
1.20
Larry
.75
...

Using an evenly distributed data population of 8,000 samples,
how many Would fall between a Z-score of -0.5 and +0.5?

What proportion of the normal distribution is located in the
middle between the z scores: z = -0.5 and z = +0.20. [1
point]
A population has a mean of μx = 100 and standard
deviation of σx = 25.
What is the proportion of scores in this population that are
lower than a score of x = 65 [1 point]
What is the proportion of scores in this population that are
greater than a score of x = 90...

Suppose your statistics professor reports test grades as
z-scores (standard scores), and you received a z-score of 2.2 on an
exam. This means your
Group of answer choices test score is 2.2 points higher than the
mean score in the class. test score is 2.2 points lower than the
mean score in the class. test score is 2.2 standard deviations
lower than the mean score in the class. test score is 2.2 standard
deviations higher than the mean score in...

A distribution has a standard deviation of σ = 10.
Find the z-score for each of the following locations in
the distribution.
Above the mean by 15 points.
Answer: ______________
Above the mean by 25 points.
Answer: _________________
Below the mean by 20 points.
Answer: ___
Below the mean by 5 points.
Answer: _________
For a distribution with a standard deviation of σ =
12, describe the location of each of the following
z-scores in terms of its position relative...

What is the difference between a descriptive z-score and an
inferential z-score?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 7 minutes ago

asked 12 minutes ago

asked 28 minutes ago

asked 38 minutes ago

asked 43 minutes ago

asked 50 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago