Thep-value is0.0022. At a 1% level of significance, the appropriate conclusion is
(a) There is sufficient evidence to conclude that the proportion of people in the United States in 2011who contracted neuroinvasive West Nile disease is less than the proportion of people in the United States in2010 who contracted neuroinvasive West Nile disease.
(b) There is insufficient evidence to conclude that the proportion of people in the United States in 2011who contracted neuroinvasive West Nile disease is more than the proportion of people in the United States in2010 who contracted neuroinvasive West Nile disease.
(c) There is insufficient evidence to conclude that the proportion of people in the United States in 2011 who contracted neuroinvasive West Nile disease is less than the proportion of people in the United States in2010who contracted neuroinvasive West Nile disease.
(d) There is sufficient evidence to conclude that the proportion of people in the United States in 2011who contracted neuroinvasive West Nile disease is more than the proportion of people in the United States in 2010who contracted neuroinvasive West Nile disease

Short Answer

Expert verified

Answer is (d)

Step by step solution

01

Given information

Given in the question that, p-value = 0.002.

02

Explanation

The Pvalue is 0.002

We can reject H0ifrole="math" localid="1654025797583" pvalue<0.01

Here, the p value is smaller than the level of significance.

Therefore, the null hypothesis is rejected.

There is enough data to establish that there are more people accessible in 2011than in 2010.

03

Incorrect Answer

The answer depend on the alternative hypothesis: H1:p1>p2

Therefore option (a),(b), (c) are incorrect answers

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

In two to three complete sentences, explain in detail how you might use Terri Vogel’s data to answer the following

question. “Does Terri Vogel drive faster in races than she does in practices?”

A new windshield treatment claims to repel water more effectively. Ten windshields are tested by simulating rain without

the new treatment. The same windshields are then treated, and the experiment is run again. A hypothesis test is conducted.

Indicate if the hypothesis test is for

a. independent group means, population standard deviations, and/or variances known

b. independent group means, population standard deviations, and/or variances unknown

c. matched or paired samples

d. single mean

e. two proportions

f. single proportion

Weighted alpha is a measure of risk-adjusted performance of stocks over a period of a year. A high positive weighted alpha signifies a stock whose price has risen while a small positive weighted alpha indicates an unchanged stock price during the time period. Weighted alpha is used to identify companies with strong upward or downward trends. The weighted alpha for the top 30 stocks of banks in the northeast and in the west as identified by Nasdaq on May 24,2013 are listed in Table 10.6 and Table10.7, respectively

Is there a difference in the weighted alpha of the top 30 stocks of banks in the northeast and in the west? Test at a 5% significance level. Answer the following questions:

a. Is this a test of two means or two proportions?

b. Are the population standard deviations known or unknown?

c. Which distribution do you use to perform the test?

d. What is the random variable?

e. What are the null and alternative hypotheses? Write the null and alternative hypotheses in words and in symbols.

f. Is this test right, left, or two tailed?

g. What is the p-value?

h. Do you reject or not reject the null hypothesis?

i. At the ___ level of significance, from the sample data, there ______ (is/is not) sufficient evidence to conclude that ______.

j. Calculate Cohen’s d and interpret it

Use the following information to answer the next five exercises. Two metal alloys are being considered as material for ball bearings. The mean melting point of the two alloys is to be compared. 15 pieces of each metal are being tested. Both populations have normal distributions. The following table is the result. It is believed that Alloy Zeta has a different melting point.

State the null and alternative hypotheses.

Use the following information to answer the next 15 exercises: Indicate if the hypothesis test is for

a. independent group means, population standard deviations, and/or variances known

b. independent group means, population standard deviations, and/or variances unknown

c. matched or paired samples

d. single mean

e. two proportions

f. single proportion

A high school principal claims that 30% of student athletes drive themselves to school, while 4% of non-athletes drive themselves to school. In a sample of 20 student athletes, 45% drive themselves to school. In a sample of 35 non-athlete students, 6% drive themselves to school. Is the percent of student athletes who drive themselves to school more than the percent of nonathletes?

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free