Question

A survey asked, "How many tattoos do you currently have on your body?" Of the 1229 males surveyed, 182 responded that they had at least one tattoo. Of the 1020 females surveyed, 137 responded that they had at least one tattoo. Construct a 90% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let p1 represent the proportion of males with tattoos and p2 represent the proportion of females with tattoos. Find the 90% confidence interval for p1−p2. The lower bound is --.

The upper bound is --.

(Round to three decimal places as needed.)

Answer #1

Here, , n1 = 1229 , n2 = 1020

p1cap = 182/1229 = 0.1481 , p2cap = 137/1020 = 0.1343

Standard Error, sigma(p1cap - p2cap),

SE = sqrt(p1cap * (1-p1cap)/n1 + p2cap * (1-p2cap)/n2)

SE = sqrt(0.1481 * (1-0.1481)/1229 + 0.1343*(1-0.1343)/1020)

SE = 0.0147

For 90% CI, z-value = 1.64

Confidence Interval,

CI = (p1cap - p2cap - z*SE, p1cap - p2cap + z*SE)

CI = (0.1481 - 0.1343 - 1.64*0.0147, 0.1481 - 0.1343 +
1.64*0.0147)

CI = (-0.01 , 0.038)

lower bound : -0.010

upper bound: 0.038

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1213 males surveyed, 191 responded that they
had at least one tattoo. Of the 1046 females surveyed, 133
responded that they had at least one tattoo. Construct a 90%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.
Let p1 represent the proportion...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1210 males surveyed,184 responded that they
had at least one tattoo. Of the 1039
females surveyed,138 responded that they had at least one
tattoo. Construct a 90%
confidence interval to judge whether the proportion of males
that have at least one tattoo differs significantly from the
proportion of females that have at least one tattoo. Interpret the
interval.
Let p1 represent the proportion of males...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1210 males surveyed, 185 responded that they
had at least one tattoo. Of the 1075 females surveyed, 135
responded that they had at least one tattoo. Construct a 99%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.Let p1 represent the proportion of...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1216 males surveyed, 179 responded that they
had at least one tattoo. Of the 1030 females surveyed, 139
responded that they had at least one tattoo. Construct a 99%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.
Let p1 represent the proportion...

A survey asked, "How many tattoos do you currently have on
your body?" Of the
12271227
males surveyed,
190190
responded that they had at least one tattoo. Of the
10601060
females surveyed,
129129
responded that they had at least one tattoo. Construct a
9999%
confidence interval to judge whether the proportion of males
that have at least one tattoo differs significantly from the
proportion of females that have at least one tattoo. Interpret the
interval.
Let
p 1p1
represent the...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1213 males surveyed, 179 responded that they
had at least one tattoo. Of the 1031 females surveyed, 148
responded that they had at least one tattoo. Construct a 99%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.
Let p1 represent the proportion...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1244 males surveyed, 192 responded that they
had at least one tattoo. Of the1070 females surveyed, 146
responded that they had at least one tattoo. Construct a 99%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.
a.Let p1 represent the proportion of...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1206 males surveyed, 198 responded that they
had at least one tattoo. Of the 1046 females surveyed, 127
responded that they had at least one tattoo. Construct a 95%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.
Let p 1p1 represent the...

A survey? asked, "How many tattoos do you currently have on
your? body?" Of the
12281228
males? surveyed,
199199
responded that they had at least one tattoo. Of the
10701070
females? surveyed,
126126
responded that they had at least one tattoo. Construct a
9090?%
confidence interval to judge whether the proportion of males
that have at least one tattoo differs significantly from the
proportion of females that have at least one tattoo. Interpret the
interval.Let
p 1p1
represent the proportion...

A survey asked, "How many tattoos do you currently have on
your body?" Of the 1209 males surveyed, 185 responded that they
had at least one tattoo. Of the 1009 females surveyed, 129
responded that they had at least one tattoo. Construct a 95%
confidence interval to judge whether the proportion of males that
have at least one tattoo differs significantly from the proportion
of females that have at least one tattoo. Interpret the
interval.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 10 minutes ago

asked 27 minutes ago

asked 35 minutes ago

asked 35 minutes ago

asked 35 minutes ago

asked 48 minutes ago

asked 51 minutes ago

asked 51 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago