Question

Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5. Assume that the groups consist of 34 couples. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of girls in groups of 34 births. The value of the mean is muequals r nothing. (Type an integer or a decimal. Do not round.) The value of the standard deviation is sigmaequals nothing. (Round to one decimal place asneeded.) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of nothing girls or fewer are significantly low.(Round to one decimal place as needed.) Values of nothing girls or greater are significantly high. c. Is the result of 25 girls a result that is significantly high? What does it suggest about the effectiveness of the method? The result is not significantlyhigh, because 25 girls is equal to greater than less than equal to nothing girls. A result of 25 girls would suggest that the method is not effective. is not effective. is effective. 2) Assume that hybridization experiments are conducted with peas having the property that for offspring, there is a 0.250.25 probability that a pea has green pods. Assume that the offspring peas are randomly selected in groups of 3030. Complete parts (a) through (c) below. a. Find the mean and the standard deviation for the numbers of peas with green pods in the groups of 3030. The value of the mean is muμequals= peas. (Type an integer or a decimal. Do not round.) The value of the standard deviation is sigmaσequals= peas. (Round to one decimal place as needed.) b. Use the range rule of thumb to find the values separating results that are significantly low or significantly high. Values of peas or fewer are significantly low. (Round to one decimal place as needed.) Values of 0.0086310.008631 peas or greater are significantly high. (Round to one decimal place as needed.) c. Is a result of 22 peas with green pods a result that is significantly low? Why or why not?The result is is not is significantly low, because 22 peas with green pods is less than equal to greater than less than nothing peas. 3)

Answer #1

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Assume that different groups of couples use a particular method
of gender selection and each couple gives birth to one baby. This
method is designed to increase the likelihood that each baby will
be a girl, but assume that the method has no effect, so the
probability of a girl is
0.50.5.
Assume that the groups consist of
2929
couples. Complete parts (a) through (c) below.
a. Find the mean and the standard deviation for the numbers of
girls in...

Assume that different groups of couples use a particular method
of gender selection and each couple gives birth to one baby. This
method is designed to increase the likelihood that each baby will
be a girl, but assume that the method has no effect, so the
probability of a girl is 0.5. Assume that the groups consist of 48
couples.Complete parts (a) through (c) below.
a. Find the mean and the standard deviation for the numbers of
girls in groups...

Suppose hybridization experiments are conducted with peas having
the property that for offspring, there is a 0.75 probability that a
pea has green pods. Assume that offspring peas are randomly
selected in groups of 10.
a) Find the mean and standard deviation for the numbers of peas
with green pods in the groups of 10
b) Use the range rule of thumb to find the values separating
results that are significantly low or significantly
high.
c) Is the result...

A certain group of test subjects had pulse rates with a mean
of
78.778.7
beats per minute and a standard deviation of
11.911.9
beats per minute. Use the range rule of thumb to identify the
limits separating values that are significantly low or
significantly high. Is a pulse rate of
142.5142.5
beats per minute significantly low or significantly high?
Significantly low values are
nothing
beats per minute or lower.
(Type an integer or a decimal. Do not round.)
Significantly high...

A gender-selection technique is designed to increase the
likelihood that a baby will be a girl. In the results of the
gender-selection technique, 933 births consisted of 470 baby girls
and 463 baby boys. In analyzing these results, assume that boys
and girls are equally likely. a. Find the probability of getting
exactly 470 girls in 933 births. b. Find the probability of getting
470 or more girls in 933 births. If boys and girls are equally
likely, is 470...

The accompanying data table describes results from groups of 10
births from 10 different sets of parents. The random variable x
represents the number of girls among 10 children. Complete the
questions below.
x P(x)
0 0.002
1 0.016
2 0.037
3 0.114
4 0.201
5 0.238
6 0.198
7 0.113
8 0.045
9 0.014
10 0.022
The maximum usual value is (Round to one decimal place as
needed.)
The minimum usual value is (Round to one decimal place as...

A group of adult males has foot lengths with a mean of 26.68 cm
and a standard deviation of 1.49cm. Use the range rule of thumb to
identify the limits separating values that are significantly low or
significantly high. Is the adult male foot length of 23.4 cm
significantly low or significantly high? Explain.
Significantly low values are ? cm or lower.
(Type an integer or a decimal. Do not round.)
Significantly high values are ? cm or higher.
(Type...

Suppose that the sitting back-to-knee length for a group of
adults has a normal distribution with a mean of μ = 24 in. and a
standard deviation of sigma equals σ = 1.1 in. These data are often
used in the design of different seats, including aircraft seats,
train seats, theater seats, and classroom seats. Instead of using
0.05 for identifying significant values, use the criteria that a
value x is significantly high if P(x or greater)≤0.01 and a value...

When a scientist conducted a genetics experiments with peas,
one sample of offspring consisted of 953 peas, with 723 of them
having red flowers. If we assume, as the scientist did, that
under these circumstances, there is a 3 divided by 4 probability
that a pea will have a red flower, we would expect that 714.75
(or about 715) of the peas would have red flowers, so the result
of 723 peas with red flowers is more than expected. a....

Assume that a set of test scores is normally distributed with a
mean of 100 and a standard deviation of 20. Use the 68-95-99.7
rule to find the following quantities. a. The percentage of scores
less than 100 is . (Round to one decimal place as needed.) b. The
percentage of scores greater than 120 . (Round to one decimal
place as needed.) c. The percentage of scores between 60 and 120
is nothing%. (Round to one decimal place as...

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