A large manufacturing company claims that less than 10% of its customers make a complaint about the company’s products. Test this claim at the 10% significance level, if a survey found that 29 out of a random sample of 320 of the company’s customers made a complaint about the company’s products.
Q: below miarzes data from a survey o sample of women. Osing 01 significance level, and assuming that…
A: We want to find the test statistic
Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…
A:
Q: Consider a drug testing company that provides a test for marijuana usage. Among 315 tested…
A:
Q: In a random sample of 580 people aged 20-24, 110 owned an iPad. In a random sample of 450 people…
A:
Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance…
A: The null an alternative hypothesis is obtained below: H0: The proportions of agree responses are the…
Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance…
A: The given table is as follows:
Q: In 2005, Health Canada claimed that 16.8% of Canadian adults are obese. A researcher wanted to check…
A: Given, The sample proportion is,
Q: Professors collected data consisting of eye color and gender of statistics students. Among 950 male…
A: Given that, For males: X1= 372 and sample size n1= 950 p1^ = X1/n1 = 372/950 =0.3916 For females:…
Q: In 2013, Steve LeCompte, a stock market trader and analyst, did a study to see which TV…
A: We have given that Sample size n =678 Favorable cases x =320 Sample proportion p^=x/n =320/678…
Q: A health organization asserts that the prevalence of smoking among male adults 18 years or older in…
A: The test hypotheses are: Null hypothesis: H0: p1 = p2 Alternative hypothesis: Ha: p1 > p2. Test…
Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…
A: Given Mean=702.5 Standard deviation=84 3 n=39
Q: facturer claims that fewer than 10% of patients who take its new drug for treating Alzheimer’s…
A: The null and alternative hypotheses will be Ho: p ≥ 0.10Ho:p≥0.10 Ha: p &lt; 0.10Ha:p<0.10…
Q: score A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…
A: Given:Mean(x)=716.2Standard deviation(s)=81.1Sample size(n)=34α=0.05
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: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance level,…
A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks The following…
Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance…
A: Chi square test of indepence.
Q: 3. A research center claims that 28% of U.S. adults' online food purchases are for snacks. In a…
A:
Q: Suppose 250 subjects are treated with a drug that is used to treat pain and 50 of them developed…
A: given data clim : p > 0.20n = 250x = 50α = 0.05p^ = xn = 50250 = 0.20
Q: The College of Graduate Studies at MNSU claims that more than 60% of undergraduate students at this…
A:
Q: A study was conducted to determine the proportion of people who dream in black and white instead of…
A: Among 274 people over the age of 55, 76 dream in black and white, and among 323 people under the age…
Q: According to the FBI and the Justice Department, 70% of all arrests are of males aged 15 to 34…
A: The level of significance is 0.01 (=1%).
Q: In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said they believed they…
A:
Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance…
A: Chi-square test goodness of fit
Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance level,…
A: Steps to find the test statistic. The calculations have been done in EXCEL. Denote oij as the…
Q: In a random sample of 315 people 90 of them were smokers. Based on the above sample test whether the…
A:
Q: In 2013, Steve LeCompte, a stock market trader and analyst, did a study to see which TV…
A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…
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 marketing survey involves product recognition in New York and California. Of 200 New Yorkers…
A: Given, A survey involves product recognition 50 knew the product out of 200 n1=200, x1=55 77 knew…
Q: the 1920's about 97% of the U.S. colleges and universities required a physical education course for…
A:
Q: There is not enough evidence to show that population proportion of adults that have never been…
A: Given data number of success , x= 250.0 sample size, n = 97 population…
Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance…
A: Here it is needed to test, whether the proportions of agree/disagree responses are the same for…
Q: Professor Jennings claims that only 35% of the students at Flora College work while attending…
A:
Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance level,…
A:
Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…
A: The random variable credit scores are normally distributed. The population mean is 707.9. We have to…
Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…
A: Given, Hypothesised Population Mean, μ= 705.87 Sample Standard Deviation, s = 83.8 Sample Size, n =…
Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance level,…
A: Introduction: If the proportions of responses are the same for subjects interviewed by men and…
Q: A marketing agency wanted to determine if a new commercial changed people's opinion about a company.…
A: Statistical hypothesis means the decision about a population parameter. Here we look at the data we…
Q: Suppose a marriage counselor believes that the proportion of married couples with three personality…
A: The provided information are:
Q: A study was designed to compare the smoking habits of married men with those married women. A…
A:
Q: The table below summarizes data from a survey of a sample of women. Using a 0.01 significance…
A: Here it is needed to test, whether the proportions of agree/disagree responses are the same for…
Q: Zobserved Zeritical left Zeritical right= We the null hypothesis. We conclude that the current…
A:
A large manufacturing company claims that less than 10% of its customers make a complaint about the company’s products. Test this claim at the 10% significance level, if a survey found that 29 out of a random sample of 320 of the company’s customers made a complaint about the company’s products.
Step by step
Solved in 3 steps with 4 images
- A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 285 people over the age of 55, 68 dream in black and white, and among 307 people under the age of 25, 14 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. An explanation for the results is that those over the age of 55 grew up exposed to media that was displayed in black and white. Can these results be used to verify that explanation? A. Yes. The results can be used to verify the given explanation because the difference in proportions is practically significant. B. Yes. The results can be used to verify the given explanation because the difference in proportions is statistically significant. C. No. The results speak to a possible difference between the proportions of people over 55 and under 25 who dream in…A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 300 people over the age of 55,80 dream in black and white, and among 287 people under the age of 25, 14 dreams in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. An explanation for the results is that those over the age of 55 grew up exposed to media that was displayed in black and white. Can these results be used to verify that explanation?
- A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 703.8. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 36 high-income individuals and found the sample mean credit score to be 719.8 with a standard deviation of 81.9. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the α=0.05 level of significance.A researcher assures that in his country, on average, the salary of workers is less than $5000.00. He takes a sample of 7 workers and finds that their salary is: $3900.00, $5100.00, $3100.00, $5500.00, $2700.00, $4500.00, $4100.00 Can you be sure at the 0.02 level of significance that the researcher is correct? Choose 1. The correct conclusion2. The correct interpretation Select one:to)1. H0 is rejected2. With a confidence of 98% it can be ensured that the average wage of the workers is not less than $5000.00b)1. H0 is not rejected2. With a confidence of 98% it can be ensured that the average wage of the workers is not less than $5000.00c)1. H0 is not rejected2. It can be ensured, with 98% confidence, that the average wage of the workers is less than $5,000.00d)1. H0 is rejected2. It can be ensured, with 98% confidence, that the average wage of the workers is less than $5,000.00The table below summarizes data from a survey of a sample of women. Using a 0.05 significance level, and assuming that the sample sizes of 800 men and 400 women are predetermined, test the claim that the proportions of agree/disagree responses are the same for subjects interviewed by men and the subjects interviewed by women. Does it appear that the gender of the interviewer affected the responses of women? Gender of Interviewer Man Woman Women who agree 535 344 Women who disagree 265 56 Click here to view the chi-square distribution table. LOADING... Identify the null and alternative hypotheses. Choose the correct answer below. A. H0: The proportions of agree/disagree responses are different for the subjects interviewed by men and the subjects interviewed by women. H1: The proportions are the same. B. H0: The proportions of agree/disagree…
- A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 285 people over the age of 55, 68 dream in black and white, and among 307 people under the age of 25, 14 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. An explanation for the results is that those over the age of 55 grew up exposed to media that was displayed in black and white. Can these results be used to verify that explanation? OA. No. The results speak to a possible difference between the proportions of people over 55 and under 25 who dream in black and white, but the results cannot be used to verify the cause of such a difference. OB. No. The results speak to a possible difference between the proportions of people over 55 and under 25 who dream in black and white, but the results are not statistically significant enough to…USA Today ran a report about a UNC poll of 1248 adults from the southern U.S. It was reported that 8% of those surveyed believe that Elvis Presley still lives. The article began with the claim that "almost 1 out of 10" Southerners still thinks Elvis is alive. At the 0.01 significance level, test the claim that the true percentage is 10%.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.
- A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 710.6. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 48 high-income individuals and found the sample mean credit score to be 723.6 with a standard deviation of 81.2. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the a = 0.10 level of significance. Click the icon to view the table of critical t-values. State the null and alternative hypotheses. Fill in the correct answers below. Ho: Hyi H (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) Approximate the P-value. The P-value is in the range Make…In a poll conducted by The New York Times and CBS News, 44% of Americans approve of the job that the Supreme Court is doing (The New York Times, June 8, 2012). Assume that this percentage was true for the population of Americans at the time of this poll was conducted. A recent poll of 1265 Americans showed that 38% of them approve of the job that the Supreme Court is doing. At a 2% significance level, can you conclude that the current proportion of Americans who approve of the job that the Supreme Court is doing is different from 44%?Round your answers to two decimal places.zobserved =zcritical left =zcritical right =We (reject, fail to reject) the null hypothesis. We conclude that the current proportion of Americans who approve of the job that the Supreme Court is doing is Choose your answer; We conclude that the current proportion of Americans who approve of the job that the Supreme Court is doing is (not different from, different…A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 708.5. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 43 high-income individuals and found the sample mean credit score to be 723.3 with a standard deviation of 84.6. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the a = 0.05 level of significance. State the null and alternative hypotheses. Ho: H (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) Make a conclusion regarding the hypothesis. the null hypothesis. There…