In 2002 a national vital statistics report indicated that about 3.4% of all births produced twins. Is the rate of twin births the same among very young​ mothers? Data from a large city hospital found only 13 sets of twins were born to 517 teenage girls. Test an appropriate hypothesis and state your conclusion. Be sure the appropriate assumptions and conditions are satisfied before you proceed. Are the assumptions and the conditions to perform a​ one-proportion z-test​ met?     Yes   No State the null and alternative hypotheses. Choose the correct answer below.     A. H0​: p=0.034 HA​: p>0.034   B. H0​: p=0.034 HA​: p≠0.034   C. H0​: p=0.034 HA​: p<0.034   D. The assumptions and conditions are not​ met, so the test cannot proceed. Determine the​ z-test statistic. Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.     A. z=nothing ​(Round to two decimal places as​ needed.)   B. The assumptions and conditions are not​ met, so the test cannot proceed.

Q: What is the level of significance? State the null and alternate hypotheses. The level of…

A: Given: alpha = 0.05

Q: A newsletter publisher believes that 72% of their readers own a Rolls Royce. A testing firm believes…

A: From the provided information, A newsletter publisher believes that 72% of their readers own a Rolls…

Q: A telephone company wishes to determine the percentage of homes with telephone answering ma What…

A:

Q: According to the American Cancer Society, in 2016 10.7% of the U.S. working population commute to…

A: From the provided information, In 2016, 10.7% of the U.S. working population commute to work by…

Q: The Nero Match Company sells matchboxes that are supposed to have an average of 40 matches per box,…

A: This is the single mean test. Here, the level of significance is 0.01. a) The null and alternative…

Q: A recommendation for the amount of vitamin C that a person should have per day is 75 mg. A…

A: given that

Q: c. The test statistic z v 1.077 x (please show your answer to 3 decimal places.) d. The p-value…

A: The sample size n is 352 and x=60.

Q: A certain brand of tortilla chips claims to have bags with an average weight of 14 ounces. A…

A: Here we need to find the null and alternative hypothesis for the given situation. Here the average…

Q: For a fixed sample size, what happens to the probability of a Type II error if the significance…

A: The sample size is fixed. The level of significance decreases from 0.05 to 0.01.

Q: An office manager believes that the mean amount of time spent by office workers reading and deleting…

A: Solution:  Manager Claim: The mean amount of time spent by office workers reading and deleting spam…

Q: 9. In Brooklyn, on average nearly four-fifths of residents (79.86%) have a first dose of their COVID…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Please help

A: The objective of this question is to conduct a hypothesis test to determine if there is a…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Note:Thank you for posting the question! Since your question has more than 3 parts, we have solved…

Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 99%…

A:

Q: Provide a general understanding of standard error. Why does it matter? How does this relate to…

A:

Q: c. The test statistic z v d. The p-value = e. The p-value is ≤ v a = 2.768 X (please show your…

A: Given that  n = 337 , X = 24 , p = 12% = 0.12

Q: students. You want to estimate the proportion p of students who never floss with 90% confidence and…

A: It is given that Proportion p = 0.27 Margin of error E = 0.03 Level of confidence = 90% The critical…

Q: An exterminator claims that no more than 10% of the homes he treats have termite problems within 1…

A:

Q: The school registrar estimates that the dropout rate of senior high schools in Cavite is 75%. Last…

A: Given Information: Claim: Dropout rate of senior high schools in Cavite is 75% i.e., p=0.75 Sample…

Q: What happens to the sample size when you don’t know a prior sample proportion?

A: To calculate the sample size when we do not know prior sample proportion.

Q: In 2010, the proportion of Texans without health insurance was 0.11. To update this information a…

A:

Q: What are we testing in this problem? O single mean O single proportion (a) What is the level of…

A: In this scenario, It is appropriate to use one proportion Z test. The correct answer is “Single…

Q: In 2002 a national vital statistics report indicated that about 3.7% of all births produced twins.…

A: The value of p is 0.037, the value of x is 14 and the sample size n is 598.

Q: A newsletter publisher believes that less than 32% of their readers own a laptop. For marketing…

A: Decision : Reject the null hypothesis.

Q: A researcher was interested in studying if there is a significant relationship between the severity…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: The Nero Match Company sells matchboxes that are supposed to have an average of 40 matches per box,…

A:

Q: A 95% confidence interval for the mean was computed with a sample of size 90 to be (16,22). Then the…

A: 1) margin of error is given by , E=(Upper confidence limit - Lower confidence limit)/2

Q: If the company sells the candy bars in packs of 4 bars, what can we say about the likelihood that…

A:

Q: What type of test do we perform to examine the size of effect in an ANOVA analysis? a. R squared or…

A: We perform to examine the size of effect in an ANOVA analysis we use test  (1) R squared or eta…

Q: We want to investigate whether Ozone values differ across months as measured.   State the null and…

A: Given, We want to investigate whether Ozone values differ across months as measured.

Q: Using the accompanying Cell Phone Survey data, apply ANOVA to determine if the mean response for…

A: The data on the cell phone survey is provided.The objective is to determine the null hypothesis and…

Q: You conduct a one-way ANOVA with 12 groups (or populations). At 0.05 significance level, you find…

A: Given :

Q: If you knew that I study reported that 67% of pre-kindergarten children ages 3 to 5 whose mother had…

A:

Q: earcher wants to determine the proportion of elm trees in Windsor, Ontario, dying of Dutch elm…

A:

Q: A research article claims proportion of women who vote is different than 0.7. In a sample of 200…

A: Given, The sample proportion is, The null and alternative hypothesis is:

Q: You work for a marketing firm that has a large client in the automobile industry. You have been…

A: a)

Q: Calculate the sample size needed in order to estimate the true proportion of defective in a large…

A:

Q: Your state is considering raising the legal age for consumption of alcohol beverages. How large a…

A: From the provided information, Margin of error (E) = 0.01 Confidence level = 99%

Q: adults whether they believed that people should pay sales tax on items purchased over the internet.…

A: Let n denote the number of U.S. adults whether they believed that people should pay sales tax on…

Q: A company specializing in parachute assembly claims that its main parachute failure rate is at most…

A: accept Ho Reject Ho Ho true correct conclusion type I error Ho false type II error correct…

Q: The city manager measures response times by looking at the proportion of calls for which paramedics…

A: It is required to test whether the proportion of calls for which paramedics arrived within 8 minutes…

Q: With the null hypothesis that a suspect is innocent, an investigation concluded that the suspect…

A: The probability of determining a test statistic value at least as extreme as the observed value…

Q: The mean salary for a new teacher in your town is $51,000.  You believe it is lower for new teachers…

A: From the provided information. The mean salary for a new teacher in your town is $51,000 that is µ =…

Q: c) Given the following ANOVA table: S.V Between MS 47.863 d.f F-ratio 32 191.450 104.720 Within…

A: Solution: c. From the given information, the ANOVA table is

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.