Question

1.) Unlike normal distributions, the standard normal distribution is purely theoretical.

Select one:

True

False

2.) Patricia's vet told her that the z-score for her dog's weight range is 1.75 for huskies. Which of the following is the best interpretation of this standardized score? The weight of huskies (measured in pounds) is approximately normally distributed with a mean of 45 lbs and a standard deviation of 3 lbs.

Select one:

a. Patricia's dog's weight is 1.75 times above the average weight of huskies.

b. Patiricia's dog's weight is 175.

c. Patricia's dog's weight is 1.75 standard deviations above the average weight for huskies.

d. Particia's dog's weight is 1.75 times the average weight for huskies.

3.)When the sample size is large, the mean of the sample (x-bar) is approximately equal to the mean of the population (µ).

Select one:

True

False

Answer #1

1.
One hundred percent of scores fall under the area of the normal
curve.
true
false
2. A z score tells nothing about the distance of a score from
the mean.
true
false
3. A z score does NOT allow for the comparison of different
scores from different distributions
true
false
4. A number whose z score is equal to zero is equal to the
mean.
true
false
5. Which of the following is not a characteristic of the
normal...

1. True or False.
1a. z-scores follow a standard normal distribution.
1b. A z-score indicates how many standard deviations a value is
1b. above or below the mean.
1c. Point estimators are always good estimates of population
parameters, and there are never any deviations or errors
1d. The process of converting a value x from a normal
distribution to a z-score is known as standardization

1. To estimate the standard error of the mean, a survey
researcher will:
Select one:
a. take the square root of the sample standard deviation.
b. none of the above.
c. multiply the sample standard deviation times the square root
of the sample size.
d. divide the sample standard deviation by the square root of
sample size.
2. Suppose that a business researcher is attempting to estimate
the amount that members of a target market segment spend annually
on detergent...

1.
the area under the normal distribution curve that lies within one
standard deviation of the mean is approxiamtely ____%.
2. for a normal distribution curve with a mean of 10 and a
standard deviation of 5, what is the range of the variable thay
defines the area under the curve correaponding to a probability of
approximately 68%?
true or false:
3. a probability can be greater than one, but not equal to
zero.
4. quartiles are used in box...

Question 3
The text mentions that
in order to use the normal distribution for binomial distributions
that EITHER n(p) OR n(q) must be > 5.
True
False
Question 4
The reason that both
n(p) and n(q) are > 5 is that otherwise the distribution is
likely skewed
True
False
Question 5
The reason that the
distribution should not be skewed is that the normal distribution
assumes that symmetrical distribtuion
True
False
Question 6
Using ONLY the 68, 95,
and 99.7...

1.IRS workers process an average of 45 cases per month during
tax season, with a standard deviation of 3 cases. The distribution
of these cases is normal. Approximately what percentage of IRS
workers would you expect to process less than 51 cases?
A.84&
B.95%
C.97.5%
D.68%
A. The distribution of weights for 24-yr old women is normally
distributed with a mean of 128 lbs and a standard deviation of 7
lbs. What percent of 20-yr old women weigh more than...

(1 point) Consider two normal distributions, one with mean 44
and standard deviation 77, the other with mean −15−15 and standard
deviation 77. Answer the following statements using
true or false.
a) The two distributions have the same shape.
answer:
b) The two distributions are centered at the same place.
answer:

One normal distribution has a mean of 5 and a standard deviation
of 2. A second normal distribution has a mean of 6 and a standard
deviation of 1. Which of the following statements is true?
Select one:
a. The dispersions of both distributions are the same.
b. The width of the first distribution is wider than the second
distribution.
c. The central location of the first distribution is higher than
the second distribution.
d. The locations of both distributions...

0. Consider a distribution of raw scores in which the
distribution is normal. Consider that each and every score is
converted into a standard score (a z score), such that the
resulting distribution is a normal distribution of standard scores
(a standard normal distribution, also known as the SND). The
standard normal distribution has all the following characteristics,
except
a. The distribution is bell-shaped.
b. The distribution is symmetrical.
c. The mean, median, and mode of the distribution are equal...

True and False
a) In a random sample of 100 observations from a normal
distribution, the inter-quartile range will contain approximately
68 of the observations. ____
b.) In a one-tailed test where n=20, the value of the Z-test
statistic equals -1.81. If α were set at 0.01, this test would be
considered significant. ____
c.) If a statistical test is significant at the 1% (alpha =
0.01) level, then it must also be significant at the 10% (alpha =
0.10)...

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