old is p2, what is the null hypothesis for a test to determine if the proportion of the population that is over 65 years old is gre

Q: (a)State the hypotheses that can be used to test for a significant difference between the population…

A: Given: p1^=4101000p2^=4201200

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: We need to state the null and alternative hypothesis statements.

Q: The mayor of a large city will run for governor if he believes that more than 30 percent of the…

A: Power increases when we increase the significance level and sample size.

Q: According to a 2001 Reader's Digest article, S0% of physicians over the age of 55 have been sued at…

A:

Q: Suppose a recent survey found that 74% of dog owners say their pet appears cheerful, while only 59%…

A: Given, p^1=0.74p^2=0.59

Q: In a sample of 49 men, 38 said that they had less leisure time today than they had 10 years ago. In…

A: The claim is that there is a difference in the proportions.

Q: About 10% of the human population is left-handed. Suppose a researcher speculates that artists are…

A:

Q: What is the correct conclusion? O A. Since the interval contains the proportion stated in the null…

A: The correct conclusion is: If confidence interval contains value of parameter in null hypothesis…

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A:

Q: The mayor of a large city will run for governor if he believes that more than 30 percent of the…

A: In which of the following situations would the power for this test be highest?

Q: Please help me only for the p-value on part (c), thank you!

A: (C)From the given information,Null and alternative hypothesis is,H0 : P=0.10Ha : p>0.10The…

Q: Two popular drugs used for the treatment of depression are Resithan and Exemor. A random sample of…

A: (a) The test is that the proportion p1 of all depressed individuals taking Resithan who find relief…

Q: A study showed that 66% of supermarket shoppers believe supermarket brands to be as good as national…

A:

Q: kindly assist,   An epidemiologist who is working in Capricorn Department of Health investigated…

A: We have given that  Sample size n =10000 Favorable cases x =275 Sample proportion p^=x/n  =275/10000…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Given :  Claim : The proportion of college students who say they’re interested in their district’s…

Q: Two researchers are testing the null hypothesis that a population proportion p is equal to 0.30, and…

A: The given null and alternative hypotheses are: H0:p=0.30H1:p=0.30 The sample proportion for…

Q: ng habits of adults in a certain region of the country are in the same proportion as the general…

A:

Q: In a recent study of a random sample of 113 people, 92 reported dreaming in color. In the 1940’s,…

A: The random variable dreaming in color follows binomial distribution. The sample size is 113. The…

Q: The National Institute of Mental Health published an article stating that in any one-year period,…

A: The hypotheses can be constructed as: Null hypothesis: H0: p = 0.095 Alternative hypothesis: H1: p…

Q: Suppose that a scientist is interested in determining if the proportion of females who prefer Diet…

A: Two sample Z test of proportions is the test to determine whether the two populations differ…

Q: A researcher studying public opinion of proposed Social Security changes obtains a simple random…

A:

Q: Two popular drugs used for the treatment of depression are Resithan and Exemor. A random sample of…

A: From the provided information,

Q: In a sample of 40 people 40% are black. Test the null hypothesis that the population proportion of…

A: A sample of 40 people; n=40 40% are black; p^=0.40 Population proportion of black; p=0.2

Q: What are the degrees of freedom for the contingency table provided? And if x2 =16, what might you…

A: The number of rows is 2 and the number of columns is 2.

Q: The paper "Living Near Nuclear Power Plants and Thyroid Cancer Risks"† investigated whether living…

A: a. The author investigated about the living area near nuclear power plants and the risk of thyroid…

Q: Among college students, the proportion p who say they’re interested in their congressional…

A:

Q: A certain financial services company uses surveys of adults age 18 and older to determine if…

A: a. Null Hypothesis: H0:p1=p2 Alternative Hypothesis: Ha:p1-p2≠0 Test Statistic: From the given…

Q: Two popular drugs used for the treatment of depression are Resithan and Exemor. A random sample of…

A: we have given that  For sample 1, we have that the sample size is N_1= 597N1​=597, the number of…

Q: Suppose a 95% CI for the proportion of adults that regularly attend a tae kwon do class at least…

A: From the provided information, Confidence level = 95% The confidence interval = (0.2534, 0.3894)

Q: When having a baby, assume that the probability of having a boy is 50% and the probability of having…

A: Amswer: See the answer below:

Q: The Associated Press found that 730 of 1000 randomly selected adults preferred to watch movies at…

A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…

Q: A major credit card company is interested in the proportion of individuals who use a competitor’s…

A:

Q: Members of the city council want to know if a majority of city residents supports a 1% increase in…

A: Since the value p-value is significantly large P-value=0.18 hence we will not be able reject the…

Q: Suppose a study revealed 63% of all subjects possessed trait A, 40% possessed trait B, and 21%…

A:

Q: A certain financial services company uses surveys of adults age 18 and older to determine if…

A: Here 2 proportion of Z test statistics is applicable.   ===========================

Q: Time magazine reported the result of a telephone poll of 800 adult Americans. The question posed of…

A: Given n1=605 n2=195 y1=351 y2=41

Q: n a survey of families in which both parents work, one of the questions asked was, “Have you refused…

A: Given: n1=200n2=200p^1=0.29p^2=0.24α=0.05

Q: Can it be concluded that the percentage today is less than 76% if a=0.01?

A: 76% of Americans said they would prefer to purchase an American automobile.  Random sample of 56…

Q: A random sample of 100 students at a high school was asked whether they would ask their father or…

A: H0: p1 = p2H1: p1 ≠ p2

Q: A polling company conducted a hypothesis test to see if people are happy with the government, and…

A: Given : A polling company conducted a hypothesis test to see if people are happy with the…

Q: In a random sample of  320  cars driven at low altitudes,  50  of them exceeded a standard of  10…

A:

Q: Two different types of injection-molding machines are used to form plastic parts. A part is…

A:

Q: sample of 100 high income voters and 40 out of a sample of 75 low income voters supported a decrease…

A: Given : x1= 60.0 n1= 100 x2= 40.0 n2= 75 significance level, 0.05

Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…

A: It is a two-tailed test.

Q: A brokerage firm is curious about the proportion of clients who have high-risk stocks in their stock…

A:

Q: In a public opinion survey, 60 out of a sample of 100 high-income voters and 40 out of a sample of…

A: Given : x1= 60.0 n1= 100 x2= 40.0 n2= 75 significance level, 0.05

Q: A major credit card company is interested in the proportion of individuals who use a competitor’s…

A: The test hypotheses are:  H0: p=0.65 vs Ha: p>0.65. It is given that the p0=0.70, the p-value is…

Q: A December 2017 Gallup Poll reported that 43% of Americans use the internet for an hour or more each…

A: Given : Let X : No. of students use an internet for an hour or more each day Sample size (n) =60 X =…

Q: In a public opinion survey, 60 out of a sample of 100 high-income voters and 40 out of a sample of…

A: Given,n1=100x1=60n2=75x2=40p1=the proportion of all high-incomevoters whosupported a decrease in…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.