Question

The proportion of Harris County residents who own a pet(s) is
80%. A researcher believes a larger proportion of Harris County
residents own a pet(s). He surveys 1,000 residents and 850
responded that they own a pet(s). Test his hypothesis at the alpha
level of .05. Steps below

a) Write the null and research hypotheses

b) Is it a one-tail or two-tail test?

c) Determine Z-critical, indicate on the normal curve.

d) Identify the acceptance and rejection regions in part c
above

e) Calculate the test statistics

f) Decide whether to accept or reject the null hypothesis

g) Conclusion

Answer #1

The proportion of people that own cats is 60%. A veterinarian
believes that this proportion is larger than 60% and surveys 400
people. Test the veterinarian's claim at the α=0.10 significance
level.
Preliminary:
Is it safe to assume that n≤0.05 of all subjects in the
population?
Yes
No
Verify np(1−p)≥. Round your answer to one decimal
place.
np(1−p)=
Test the claim:
The null and alternative hypotheses are
H0:μ≥0.6
Ha:μ<0.6
H0:μ=0.6
Ha:μ≠0.6
H0:p=0.6
Ha:p≠0.6
H0:p≤0.6
Ha:p>0.6
H0:μ≤0.6
Ha:μ>0.6
H0:p=0.6
Ha:p<0.6
The...

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at a nurs... A researcher believes increased perceived control
influence the well-being of residents at a nursing home. To test
this , she allowed one group of residents to have control over
their daily lies, (where to eat etc) . The other group of 5
residents had these deceisions made by staff. The resident's
feelings...

An amateur researcher believes that the number of books owned is
correlated with emotional intelligence (EQ). She randomly surveys
100 women and 100 men and finds r = .22. What does she
conclude?
Null hypothesis:
Alternative hypothesis:
Statistical test:
Significance level (I'll pick it for you; alpha = .05)
Critical region for rejecting null hypothesis:
Calculate the statistic (please show your work):
Decision:

Test the claim that the proportion of men who own cats is larger
than 90% at the .05 significance level.
The null and alternative hypothesis is:
H0:p=0.9
H1:p>0.9
Based on a sample of 80 people, 99% owned cats
The test statistic is: _______ (to 2
decimals)
The critical value is: _______ (to 2 decimals)

Test the claim that the proportion of men who own cats is
smaller than 80% at the .05 significance level. The null and
alternative hypothesis would be: H 0 : μ = 0.8 H 1 : μ < 0.8 H 0
: p = 0.8 H 1 : p ≠ 0.8 H 0 : μ = 0.8 H 1 : μ > 0.8 H 0 : p =
0.8 H 1 : p > 0.8 H 0 : μ =...

i. A researcher estimated the proportion of voters who favor the
Democratic candidate in an election. Based on 500 people she
calculates the 95% confidence interval for the population
proportion p: 0.123 <p<0.181.
Which of the following is a valid interpretation of this
confidence interval ?______
a. There is a 95% chance that the true value of p lies between
0.123 and 0.181
b. If many different samples of 500 were selected
and a confidence interval was constructed based on...

1. A researcher expects the
population proportion of FIFA fans in Abu Dhabi to be 80 percent.
The researcher wishes to have an error of less than 5 percent and
to be 98 percent confident of an estimate to be made from a mail
survey. What sample size is required?
2. A study is being conducted to
compute the price of a hand cream. The researcher needs the error
range of the price to be within $1, and suspects that...

1. A null hypothesis states that there is
A. No significant difference between a population parameter and
sample statistic.
B. A significant difference between a population parameter and
sample statistic.
C. The difference between the population parameter and sample
statistic is significant and can be attributed to sampling
error.
D. The difference between the population parameter and sample
statistic is insignificant and cannot be attributed to sampling
error.
E. None of the above
2. An alternative hypothesis states that there...

An education researcher claims that
58%
of college students work year-round. In a random sample of
300
college students,
174
say they work year-round. At
α=0.10,
is there enough evidence to reject the researcher's claim?
Complete parts (a) through (e) below.
a) Identify the claim and state
H0
and
Ha.
Identify the claim in this scenario. Select the correct choice
below and fill in the answer box to complete your choice.
(Type an integer or a decimal. Do not round.)...

6. Tinder is a dating app that allows users to meet potential
romantic partners based on geographical proximity. To use Tinder,
an individual merely swipes to the right to “like” a potential
partner or swipes to the left to “pass” on a potential partner. If
two users both like each other, it’s considered a “match,” and they
are then able to chat through the app. It’s been claimed that 90%
of Tinder users meet their matches within one week, but...

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