Question

A gender-selection technique is designed to increase the likelihood that a baby will be a girl. In the results of thegender-selection technique,837 births consisted of 438 baby girls and 399 baby boys. In analyzing these results, assume that boys and girls are equally likely.

a. Find the probability of getting exactly 438 girls in 837 births.

b. Find the probability of getting 438 or more girls in 837 births. If boys and girls are equally likely, is 438 girls in 837 births unusually high?

c. Which probability is relevant for trying to determine whether the technique is effective: the result from part (a) or the result from part (b)?

d. Based on the results, does it appear that the gender-selection technique is effective?

Answer #1

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,
813 births consisted of 414 baby girls and 399 baby boys. In
analyzing these results, assume that boys and girls are equally
likely.
a. Find the probability of getting exactly 414 girls in 813
births.
b. Find the probability of getting 414 or more girls in 813
births. If boys and girls are equally likely, is 414...

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, 845 births consisted of 432 baby girls
and 413 baby boys. In analyzing these results, assume that boys
and girls are equally likely.
a. Find the probability of getting exactly 432 girls in 845
births.
b. Find the probability of getting 432 or more girls in 845
births. If boys and girls are equally likely, is 432...

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...

Please provide answers for the questions a, b, c and d.
Thank You :)
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, 809 births consisted of 421 baby girls
and 388 baby boys. In analyzing these results, assume that boys
and girls are equally likely.
a. Find the probability of getting exactly 421 girls in 809
births.
b. Find the probability of getting 421 or...

In a test of a gender-selection technique, results consisted
of 220 baby girls and 17 baby boys. Based on this result, what is
the probability of a girl born to a couple ing this technique? Does
it appear that the technique is effective in increasing the
likelihood that a baby will be a girl?

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...

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 34
couples. Complete parts (a) through (c) below. a. Find the mean
and the standard deviation for the numbers of girls in...

Determine whether the results appear to have statistical
significance, and also determine whether the results appear to have
practical significance.
In a study of a gender selection method used to increase the
likelihood of a baby being born a girl,
20462046
users of the method gave birth to
10051005
boys and
10411041
girls. There is about
aa
2222%
chance of getting that many girls if the method had no
effect.

A clinical trial tests a method designed to increase the
probability of conceiving a girl. In the study 520 babies were
born, and 286 of them were girls. Use the sample data to construct
a 99% confidence interval estimate of the percentage of girls
born. Based on the result, does the method appear to be
effective?
< p <
Does the method appear to be effective?

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