Question
In: Statistics and Probability
Write out the null and alternative hypotheses for the following hypothetical proposal. Carry out a one-sample...
Write out the null and alternative hypotheses for the following hypothetical proposal. Carry out a one-sample Z test to determine significance at the α=0.05 level.
PROPOSAL
In the field of cancer epidemiology, many researchers are interested in developing risk measurement assays that are intended to influence the screening process for prevention of late stage and metastatic cancers. Parity, or the number of children that a woman has over her lifetime, is associated with the overall risk of breast cancer in women. Suppose that a researcher gathers a SRS of 135 women, and calculates an average of 3.2 births for the variable parity. Assume that women who give birth less than 4 times are at a 1.3 times increased risk for developing breast cancer. Does this researcher have sufficient evidence to claim that women in his population are at an increased risk for the disease? Use a population standard deviation of 0.37 births based on former research.
Solutions
orchestra answered 1 year agoRelated Solutions
write formal null and alternative hypotheses for the following proposal: GCC Students that use public transportation...
write formal null and alternative hypotheses for the following
proposal:
GCC Students that use public transportation and GCC students
that use cars as their form of transportation. measure the number
of times they are late/absent to class and expect student who take
public transportation to have more tardies and absentees'
For the following situations, please write out null and alternative hypotheses. a. Assuming m = 100,...
For the following situations, please write out null and
alternative hypotheses.
a. Assuming m = 100, do children who watch more than three hours
of TV per day have significantly lower IQs?
b. Assuming m = 100, a cognitive psychologist would like to know
if the IQs of children who play outside at least three days a week
are different from that of the population.
c. Assuming m = 50, write out the null and a non-directional
alternative hypothesis.
Write the null and alternative hypotheses for each of the following examples. Determine if each is...
Write the null and alternative hypotheses for each of the
following examples. Determine if each is a case of a two-tailed, a
left-tailed, or a right-tailed test. Also determine the sampling
distribution for the hypothesis test.
a.To test if the mean number of hours spent working per week by
college students who hold jobs is different from 20 hours.
b.To test whether or not a bank’s ATM is out of service for an
average of more than 10 hours per...
Write the null and alternative hypotheses for each of the following examples. Determine if each is...
Write the null and alternative hypotheses for each of the
following examples. Determine if each is a case of a two-tailed, a
left-tailed, or a right-tailed test. (a) To test if the mean number
of hours spent working per week by college students who hold jobs
is different from 20 hours (b) To test whether or not a bank’s ATM
is out of service for an average of more than 10 hours per month
(c) To test if the mean...
Write the null and alternative hypotheses in notation for each of the following statements. 3a. [1...
Write the null and alternative hypotheses in notation for each
of the following statements.
3a. [1 point] The μ for scores on the Wechsler Adult
Intelligence Test is 100.
3b. [1 point] For a population of 25- to 54-year-old women, the
mean amount of television watched each day is 4.4 hours.
3c. [1 point] The mean reaction time of 19-year-old males to a
simple stimulus is at least 423.0 milliseconds.
Given the following information, test whether the population
mean is...
For each of the following: a) state the null and alternative hypotheses &n
For each of the following: a) state the null and
alternative hypotheses
b) state the type I & type II errors
c) state the consequences of each error
d) is one more serious? Explain.
1) You have created a new manufacturing method for
producing widgets which you claim will reduce the time necessary
for assembling the parts. Currently it takes 75 seconds to produce
a widget. The retooling of the plant for this change is very
expensive...
Write the null and alternative hypotheses. Identify the dependent variable, the factor, and the levels of...
Write the null and alternative hypotheses. Identify the
dependent variable, the factor, and the levels of the factor.
1. A study of the impact of graphical quality on time spent
playing a computer game. Researchers record the time, in minutes,
that children spent playing three computer games: one game with
minimal 2D graphics, one with high 2D graphic quality, and one with
3D graphic quality.
2. A study of the number of hits a video gets on YouTube based
on...
How does one determine the null and alternative hypotheses? Give examples
How does one determine the null and alternative
hypotheses? Give examples
State the null and alternative hypotheses for each of the following situations. (That is, identify the...
State the null and alternative hypotheses for each of the
following situations. (That is, identify the correct number
μ0 and write H0:μ=μ0 and the appropriate
analogous expression for Ha.)
A. The average July
temperature in a region historically has been 74.5°F. Perhaps it is
higher now.
B. The average weight of a
female airline passenger with luggage was 145 pounds ten years ago.
The FAA believes it to be higher now.
C. The average stipend for
doctoral students in a particular discipline at...
Following to questions answer the following: - Provide the null and alternative hypotheses with the appropriate...
Following to questions answer the following:
- Provide the null and alternative hypotheses with the
appropriate symbols.
- The significance level of the test. If it is not given use a
significance level of 0.05.
- The P-value for the test. State whether you reject or fail to
reject the null hypothesis. In other words, compare the P-value to
the significance level to decide whether to reject or fail to
reject the null hypothesis.
Question 1:
The body mass index...
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