Is there enough evidence to support the college's claim at 5% level of significance?
Q: A college entrance exam company determined that To achieve this goal, the company recommends that…
A: a) Let μ be the population mean math score on the college entrance exam. The claim is that students…
Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…
A:
Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…
A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…
Q: In a survey conducted by a website, employers were asked if they had ever sent an employee home…
A: Followings are the explanation of the question Use the One sample Z proportion test for the given…
Q: The National Academy of Science reported that 38% of research in mathematics is published by US…
A: Solution: Given data p = 0.38 Sample size( n) = 279 x = 123 Level Of significance = 0.02 To Test the…
Q: In 2014, the Pew Research Centers American Trends Panel sought to better understand what Americans…
A: Solution: Let X be the number of adults correctly interpret a scatterplot and n be the sample number…
Q: In a survey conducted by a website, employers were asked if they had ever sent an employee home…
A: From given data we have : n=2769 x=978 The claim is more than one-third of employers have sent and…
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for…
A:
Q: The National Academy of Science reported that 36% of research in mathematics is published by US…
A: Given p=36%, n=278, X=85 Level of significance ɑ=0.02
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for…
A:
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: From the provided information, Sample size (n) = 245 From which 189 of them stayed together. Sample…
Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…
A: Solution: Given information: n = 210 Sample size p= 0.11 Population proportion
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: Given data issample size(n)=205x=164sample proportion(p^)=xn=164205=0.8significance level(α)=0.05
Q: Approximately 20.5% of the U.S. population 5 years old and older speaks a language other than…
A: sample size is 400 & Population Proportion =0.205
Q: The National Academy of Science reported that 33% of research in mathematics is published by US…
A: sample size(n)=280No.of articles have US authors(x)=108significance level(α)=0.01
Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…
A: Note: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts…
Q: Report the test statistic. Round your answer to TWO decimal places. You may use the observed…
A: It is given that Favourable cases, x = 777 Sample size, n = 2101 Population proportion, p = 34.5% =…
Q: Based on past experience, a hiring manager believes that less than one-third of applicants are…
A:
Q: The National Academy of Science reported that 31% of research in mathematics is published by US…
A: Given : Hypothesized proportion : p0=0.31 Claim : Proportion is different from 0.31 . Sample size :…
Q: publisher reports that 67% of their readers own a particular make of car. A marketing executive…
A: Solution
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: From the provided information,Sample size (n) = 210From which 167 of them stayed together.Level of…
Q: Suppose 236 subjects are treated with a drug that is used to treat pain and 50 of them developed…
A: Solution: State the hypotheses Null hypothesis: H0: p≤0.20 That is, the proportion of users develop…
Q: Suppose 221 subjects are treated with a drug that is used to treat pain and 52 of them developed…
A:
Q: According to the U.S. Census Bureau, 11% of children in the United States lived with at least one…
A:
Q: In a survey of 1,000 women aged 22 to 35 who work full time, 555 indicated that they would be…
A: A survey of 1,000 women aged 22 to 35 who work full time were considered in which 555 indicated that…
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: The proportion, p, of all married couples for whom the communication program can prevent divorce, is…
Q: In a survey conducted by a website, employers were asked if they had ever sent an employee home…
A: Sample size, n=2765 Number of successes, x=964
Q: The article “Facebook Use and Academic Performance Among College Students” estimated that 87% of…
A:
Q: According to the U.S. Census Bureau, 11% of children in the United States lived with at least one…
A: It is given that p=0.11.
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: given data clim : p > 0.76n = 215x = 171α = 0.05p^ = xn = 171215 = 0.7953
Q: n February 2008, an organization surveyed 1040 adults age 18 and older and found that 539 believe…
A: State the hypotheses.
Q: school administrator claims that 85% of the students at his large school plan to attend college…
A: Given that ; Sample size (n) = 50 P = 85 % P(cap) = 76% By using one sample proportion test we get
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: Note:- Since you have posted a question with multiple subparts, we will provide the solution only to…
Q: The bad debt ratio for a financial institution is defined to be the dollar value of loans defaulted…
A: The data of mean bad debt ratio of 65 banks are given and objective is to test whether the mean bad…
Q: In a survey conducted by a website, employers were asked if they had ever sent an employee home…
A: Given, The sample proportion is,
Q: Suppose 243 subjects are treated with a drug that is used to treat pain and 50 of them developed…
A: Given, The number of subjects treated with a drug that is used to treat pain is n=243 The number of…
Q: The National Academy of Science reported that 31 % of research in mathematics is published by US…
A: p=0.31 n=188 x=74
Q: According to the Pew Research Center, the proportion of the American population who use only a…
A: Given that n = 30 x = 16 α=0.10Given claim : proportion greater than 0.37The claim is either the…
Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…
A: Given that Sample size n =200 Favorable cases x =30 Sample proportion p^=x/n =30/200 =0.15
Q: USA Today (Feb. 17, 2011) described a survey of 1,008 American adults. One question on the survey…
A: a) The sample proportion is p-cap = 205/1008 = 0.203 b) The population proportion p is…
Q: (a) State the null hypothesis Ho and the alternative hypothesis H₁. H:0 H₁:0 (b) Determine the type…
A: It is given that Population proportion, p = 80% = 0.80 Favourable cases, X = 178 Sample size, n =…
Q: The National Academy of Science reported that 33% of research in mathematics is published by US…
A: This problem can be solved using z test for proportion. The formula for the z test statistic is…
Q: A marriage counselor has traditionally seen that the proportion p of all married couples for whom…
A: Given that Sample size n =205 Favorable cases x =171 Sample proportion p^=x/n =171/205 =0.8341
Q: Zobserved Zeritical left Zeritical right= We the null hypothesis. We conclude that the current…
A:
Q: The National Academy of Science reported that 41% of research in mathematics is published by US…
A: Given,n=186x=92p^=xnp^=92186=0.4946α=0.05
Q: The National Academy of Science reported that 33% of research in mathematics is published by US…
A: sample size(n)=280x=108α=0.01
Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…
A: Given thatSample size =120Number of left handed=15Population proportion=0.11Population…
A certain college claims that less than 30% of their graduates did not find employment after one year of graduation. Based on the research conducted from a sample of 100 randomly selected graduates, 27 of them were NOT employed. Is there enough evidence to support the college's claim at 5% level of significance?
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 5 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
- A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 77%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than 77% of married couples. In a random sample of 250 married couples who completed her program, 194 of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor's claim at the 0.10 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H₁. H₁:0 H₁ :0 (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 (d) Find the p-value. (Round to three or more decimal places.) 0 (e) Is there enough…A company claims that at least 94% of equipment supplied to a manufacturer is within specifications. A test of a sample of 200 pieces of equipment showed that 27 of them were faulty. Test their claim at the 5% significance level?A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 80%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than 80% of married couples. In a random sample of 215 married couples who completed her program, 180 of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor’s claim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. A. State the null hypothesis Hoand the alternative hypothesis H1. Ho: H1: B. Find the value of the test statistic. (Round to three or more decimal places.) C. Find the critical value. (Round to three or more decimal places.) D. Is there enough evidence to support the marriage counselor's claim that the proportion of married couples for whom her program…
- A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 79%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than 79% of married couples. In a random sample of 250 married couples who completed her program, 205 of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor's claim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H₁. H₂ : D H₁ : 0 (b) Determine the type of test statistic to use. (Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) 0 (d) Find the p-value. (Round to three or more decimal places.) 0 (e) Is there enough…A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 77%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than 77% of married couples. In a random sample of 215 married couples who completed her program, 167 of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor’s claim at the 0.10 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0 and the alternative hypothesis H1. H0: H1: (b) Determine the type of test statistic to use. ▼(Choose one) (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the p-value. (Round to three…A political scientist claims that 38% of first-year college students characterize themselves as being “moderate” or “middle of the road” as far as their political affiliation is concerned. Believing this claimed value is too high, you survey a random sample of 400 first-year college students and find that 120 characterize themselves as being “moderate” or “middle of the road.” Based on this information, what will the test statistic be? Choose the answer below that is closest to what you calculate, and try not to do a lot of rounding until you get to the very end of your calculations. 1. -0.3 2. -1.2 3. -2.6 4. -3.3 5. None of the other answer options are correct because the test statistic should be positive, not negative.
- It is believed that 11% of all Americans are left-handed. A college needs to know how many left-handed desks to place in the big lecture halls being constructed on its campus. In a random sample of 210 students from that college, whether or not a student was left-handed was recorded for each student. The college wants to know if the data provide enough evidence to show that students at this college have a higher percentage of left-handers than the general American population? State the random variable, population parameter, and hypotheses. State the Type I and Type II errors in the context of this problem.A marriage counselor has traditionally seen that the proportion p of all married couples for whom her communication program can prevent divorce is 78%. After making some recent changes, the marriage counselor now claims that her program can prevent divorce in more than 78% of married couples. In a random sample of 240 married couples who completed her program, 189 of them stayed together. Based on this sample, is there enough evidence to support the marriage counselor’s claim at the 0.10 level of significance?Perform a one-tailed test. Then complete the parts below."At a certain college, it is estimated that about 37% of the students have cars on campus, and with this number, the parking lot is fully occupied. Would you suggest to increase the parking lot space if, in a random sample of 48 college students, 24 are found to have cars? Use 0.01 level of significance."
- In a certain school district, it was observed that 29% of the students in the element schools were classified as only children (no siblings). However, in the special program for talented and gifted children, 130 out of 373 students are only children. The school district administrators want to know if the proportion of only children in the special program is significantly different from the proportion for the school district. Test at the a = 0.05 level of significance. What is the hypothesized population proportion for this test? P =0.34 (Report answer as a decimal accurate to 2 decimal places. Do not report using the percent symbol) Based on the statement of this problem, how many tails would this hypothesis test have? one-tailed test two-tailed test Choose the correct pair of hypotheses for this situation: (C) (В) (A) Ho: p 0.29 Ho:p 0.29 Ho:p 0.29 H p 0.349 Ha p (F) (E) 0.349 (A) (B) (C) (D) (E) (F) N a e WResearchers found that in a sample of 2101 Vietnam veterans, 777 had been divorced at least once (Gimbel and Booth, 1994). U.S. Census figures indicate that among all American men born between 1945 and 1954, by age 50 about 34.5% had been divorced at least once. Conduct a test of significance to assess whether or not the sample data from the study provide strong evidence that the divorce rate among all Vietnam veterans is greater than 34.5%. What is the test statistic(3 decimals) and pvalue(4 decimals)A random sample of 1100 potential voters was randomly divided into 2 groups. Group 1: 500 potential voters; no registration reminders sent; 248 registered to vote Group 2: 600 potential voters; registration reminders sent; 332 registered to vote Do these data support the claim that the proportion of voters who registered was greater in the group that received reminders than in the group that did not? Use a 1% level of significance.
![MATLAB: An Introduction with Applications](https://www.bartleby.com/isbn_cover_images/9781119256830/9781119256830_smallCoverImage.gif)
![Probability and Statistics for Engineering and th…](https://www.bartleby.com/isbn_cover_images/9781305251809/9781305251809_smallCoverImage.gif)
![Statistics for The Behavioral Sciences (MindTap C…](https://www.bartleby.com/isbn_cover_images/9781305504912/9781305504912_smallCoverImage.gif)
![Elementary Statistics: Picturing the World (7th E…](https://www.bartleby.com/isbn_cover_images/9780134683416/9780134683416_smallCoverImage.gif)
![The Basic Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319042578/9781319042578_smallCoverImage.gif)
![Introduction to the Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319013387/9781319013387_smallCoverImage.gif)
![MATLAB: An Introduction with Applications](https://www.bartleby.com/isbn_cover_images/9781119256830/9781119256830_smallCoverImage.gif)
![Probability and Statistics for Engineering and th…](https://www.bartleby.com/isbn_cover_images/9781305251809/9781305251809_smallCoverImage.gif)
![Statistics for The Behavioral Sciences (MindTap C…](https://www.bartleby.com/isbn_cover_images/9781305504912/9781305504912_smallCoverImage.gif)
![Elementary Statistics: Picturing the World (7th E…](https://www.bartleby.com/isbn_cover_images/9780134683416/9780134683416_smallCoverImage.gif)
![The Basic Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319042578/9781319042578_smallCoverImage.gif)
![Introduction to the Practice of Statistics](https://www.bartleby.com/isbn_cover_images/9781319013387/9781319013387_smallCoverImage.gif)