Question
In: Statistics and Probability
A random sample of 158 recent donations at a certain blood bank reveals that 88 were...
A random sample of 158 recent donations at a certain blood bank
reveals that 88 were type A blood. Does this suggest that the
actual percentage of type A donations differs from 40%, the
percentage of the population having type A blood? Carry out a test
of the appropriate hypotheses using a significance level of
0.01.
State the appropriate null and alternative hypotheses.
what is the z value?
What is the p-value
Solutions
orchestra answered 2 years agoRelated Solutions
A random sample of 158 recent donations at a certain blood bank reveals that 86 were...
A random sample of 158 recent donations at a certain blood bank
reveals that 86 were type A blood. Does this suggest that the
actual percentage of type A donations differs from 40%, the
percentage of the population having type A blood? Carry out a test
of the appropriate hypotheses using a significance level of 0.01.
State the appropriate null and alternative hypotheses.
Calculate the test statistic and determine the P-value.
(Round your test statistic to two decimal places and...
A random sample of 152 recent donations at a certain blood bank reveals that 88 were...
A random sample of 152 recent donations at a certain blood bank
reveals that 88 were type A blood. Does this suggest that the
actual percentage of type A donations differs from 40%, the
percentage of the population having type A blood? Carry out a test
of the appropriate hypotheses using a significance level of
0.01.
State the appropriate null and alternative hypotheses.
H0: p = 0.40
Ha: p > 0.40
H0: p = 0.40
Ha: p ≠ 0.40
H0:...
A random sample of 154 recent donations at a certain blood bank reveals that 84 were...
A random sample of 154 recent donations at a certain blood bank
reveals that 84 were type A blood. Does this suggest that the
actual percentage of type A donations differs from 40%, the
percentage of the population having type A blood? Carry out a test
of the appropriate hypotheses using a significance level of
0.01.
State the appropriate null and alternative hypotheses.
Calculate the test statistic and determine the P-value.
(Round your test statistic to two decimal places and...
A random sample of 145 recent donations at a certain blood bank reveals that 81 were...
A random sample of 145 recent donations at a certain blood bank
reveals that 81 were type A blood. Does this suggest that the
actual percentage of type A donations differs from 40%, the
percentage of the population having type A blood? Carry out a test
of the appropriate hypotheses using a significance level of
0.01.
State the appropriate null and alternative hypotheses.
H0: p = 0.40
Ha: p > 0.40
H0: p = 0.40
Ha: p <
0.40 H0:...
A nonprofit organization appeals for donations by phoning or emailing recent college graduates. A random sample...
A nonprofit organization appeals for donations by phoning or
emailing recent college graduates. A random sample of 300 graduates
shows that 40% of the 150 who were contacted by telephone actually
made contributions compared to only 30% of the 150 who received
email requests.
Calculate a 95% confidence interval for the difference in the
proportions of graduates who may make donations if contacted by
phone or by email. Give your answer to at least 4 decimal
places.
(,)
Interpret the...
On the island of Lilliput, a sample random sample of 500 people reveals that 450 of...
On the island of Lilliput, a sample random sample of 500
people reveals that 450 of them prefer to open their egg on the
small end. On the island of Blefuscu, a sample random sample of 400
people reveals that 345 of them prefer to open their egg on the
small end.
Assuming that Lilliputians and Blefuscuans are equally likely
to open their egg on the small end, what is the probability of
selecting samples of these sizes with the...
A random sample of 100 voters found that 46% were going to vote for a certain...
A random sample of 100 voters found that 46% were going to vote
for a certain candidate. Find the 90% confidence interval for the
population proportion of voters who will vote for that
candidate.
A. 38.7% < p < 53.3%
B. 37.8% < p < 54.2%
C. 41.9% < p < 50.1%
D. 39.6% < p < 52.4%
A nonprofit organization sent mailing labels along with a request for donations to a random sample...
A nonprofit organization sent mailing labels along with a
request for donations to a random sample of 75,000 potential donors
on their mailing list and received 5625 donations from the effort.
In the past, the organization has had a contribution rate of 6%,
but the director of the program hoped that the addition of the
mailing labels would increase that rate. Perform a hypothesis test
using α=0.05. Be sure to include the following:
State the null and alternative hypotheses in...
A nonprofit organization sent mailing labels along with a request for donations to a random sample...
A nonprofit organization sent mailing labels along with a
request for donations to a random sample of 75,000 potential donors
on their mailing list and received 5625 donations from the effort.
In the past, the organization has had a contribution rate of 6%,
but the director of the program hoped that the addition of the
mailing labels would increase that rate. Perform a hypothesis test
using α=0.05. Be sure to include the following:
State the null and alternative hypotheses in...
(a) Suppose that a random sample of 387 television ads in the United Kingdom reveals that...
(a) Suppose that a random sample of 387
television ads in the United Kingdom reveals that 131 of these ads
use humor. Find a point estimate of and a 95 percent confidence
interval for the proportion of all U.K. television ads that use
humor. (Round your answers to 3 decimal
places.)
pˆp^ = [ ]
The 95 percent confidence interval is [ , ].
(b) Suppose a random sample of 493 television
ads in the United States reveals that 134...
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