A sample statistic and margin of error are given. Find the confidlence interval IEkely to contalin the population parrameter of interest and answer fthe question. 21) A poll conducted the day before the student-body presidential election at a midwestern uni versity showed that 53.6 percent favored Mario, the rest favoring Yin Ling. The margin of error was 4.2 percentage points. Should Yin Ling have conceded the election?
Q: In a recent survey of 47 science teachers, 32 said the school-provided textbooks were adequate. Find…
A: Survey of 47 teachers N=47 n=32 Sample proportion = (n/N) We have to calculate Standard error of…
Q: A single sampling plan with lot size, N= 10,000 is preferred with a consumer's risk of 0.10 of…
A: Given: Lot size = 10,000 Consumer's risk = 0.10 Producer's risk = 0.05
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: Given : E = 3% = 0.03 p1 = 0.214 p2 = 0.187 Z = 2.576 at 99% confidence
Q: A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in…
A:
Q: A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in…
A: Note: Hey, since multiple sub parts are posted, we will answer first three sub parts according to…
Q: 4. Draw the primary and supplementary OC curves for a double-sampling plan with ni = 60, ci = 3, n2…
A:
Q: An inspector took a random sample of 150 restaurants in Seattle and found that 30% in the sample…
A: a) Consider that p is the true population proportion of restaurants, which have food safety…
Q: (b) Determine the proportion of matches in which Tallygaroopna scored between at least 120 but less…
A: The proportion of matches in which Tallygaroopna scored between at least 120 but less than 180…
Q: A marketing research firm wishes to conduct a poll in a certain region to estimate the proportion of…
A: Solution: From the given information, confidence level is 0.90 and E=0.03.
Q: Many states are carefully considering steps that would help them collect sales taxes on items…
A: The given information is as follows: Denote the population proportion of transactions that…
Q: To avoid difficulties with the Federal Trade Commission or state and local consumer protection…
A: if the bottling machine is set to produce a mean fill per bottle of 12.1 ounces , what is the…
Q: In a random sample of 81 professional actors, it was found that 8 were extroverts. Let p represent…
A: Given In a random sample of 81 professional actors, it was found that 8 were extroverts. Let p…
Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…
A: Givenconfidence level = 90%Margin of error(E)=2%=0.02p^=0.45
Q: A polling agency wants to determine the percentage of voters in favor of extending tax cuts. They…
A:
Q: Do the states that voted for McCain have a different average percent of heavy drinkers than the…
A: 1. A study is conducted to determine whether McCain states and Obama states have different average…
Q: In a poll of 1000 randomly selected voters in a local election, 291 voters were against school bond…
A: From the provided information, Sample size (n) = 1000 291 voters were against school bond measures…
Q: In a CBS poll of 1289 adults, nationwide, asking whether they favor or oppose teacher and school…
A:
Q: In a random sample of 74 homeowners in a city, 22 homeowners said they would support a ban on…
A: From the given information, In a random sample of 74 homeowners in a city, 22 homeowners said they…
Q: Suppose 1,620 of 2,000 registered voters sampled said they planned to vote for the Republican…
A:
Q: For comparing two sample proportions, the parameters of the pooled estimate must be? A. not equal…
A:
Q: Give an example of computing an appropriate sample size using the length of the interval.
A: Solution : Formula for computing sample size using the length of interval is, n = Zα2σd2 where , σ =…
Q: The Institute of Education Sciences measures the high school dropout rate as the percentage of…
A: Given:n = 1000Population Proportion, p = 8.1% = 0.081Significance level, α = 5% = 0.05
Q: In 2010, a survey was given to 822 teenagers, aged 13 to 17, randomly selected by the allup Poll.…
A: Solution: Given information: n= 822 Sample size p^=0.84 Sample proportionq^= 1-p^=0.16 Assume level…
Q: Find the regression equation, letting the diameter be the predictor (x) variable. Find the best…
A: Regression equation: The regression analysis is conducted here by using EXCEL. The software…
Q: In a poll of 1000 randomly selected voters in a local election, 160 voters were in favor of fire…
A: Given,sample size (n)=1000no.of voters were in favor of fire department (x)=160α=1-0.99=0.01α2…
Q: Out of 600 people sampled, 132 preferred Candidate A. Based on this, estimate what proportion of the…
A:
Q: Many states are carefully considering steps that would help them collect sales taxes on items…
A:
Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…
A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…
Q: A political campaign manager wishes to survey a number of voters to estimate the proportion of those…
A:
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: To estimate the male proportion P1 = 0.223 and female proportion P2 = 0.198 Margin of Error E = 0.02…
Q: Identify the sampling techniques used, and discuss potential sources of bias (if any). Explaln. In…
A: Given statement: In 1965, researchers used random digit dialing to call 1500 people and ask what…
Q: Use the given data to find the minimum sample size required to estimate the population proportion.…
A: Formula for the sample size needed to estimate a population proportion is
Q: Has the law that mandates the use of bicycle helmets failed? The National Cycling Association wants…
A: Dear students as per guidelines we answer the first three subparts only. Solution To find confidence…
Q: The Los Angeles City Controller's office calculated that in 2013, the city employed 4703047030…
A: Given: 2013 Number of full time employees = 47030 Number of part time employees = 10142 p denotes…
Q: We want to determine the AOQ for an acceptancesampling plan when the quality of the incoming lots in…
A: Given : Sample size(n) =80 Lot size(N) = 550 defective is 1.5%=0.015 , and the incoming percent…
Q: The human resource manager at a car dealership wants to know if the ages of its employees are…
A: b) Null Hypothesis: H0: The variables age and departments are independent. Alternative Hypothesis:…
Q: A researcher wishes to estimate, with 99% confidence, the population proportion of adults who…
A: From the provided information, Confidence level = 99% Margin of error = 0.04
Q: The Institute of Education Sciences measures the high school dropout rate as the percentag of 16-…
A: Answer: A. Reject Ho; we can conclude that the high school dropout rate has decreased.
Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…
A: Given information- Sample size, n = 31 Significance level, α = 0.01 Sample proportion- Hypothesis…
Q: which statement is correct ( asnswer in few lines) 1 there is no sampling risk , if sampling…
A: Sampling risk is the risk that the conclusion reached using the sample is different from the…
Q: If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the…
A: Given pcap=0.7, Zcritical=1.96 at alpha=0.05 MOE=0.20
Q: In the past, 35% of the students at ABC University were in the Business College, 35% of the students…
A: It is given that the 35% students are in Business College, 35% students are in Liberal Arts College…
Q: A poll is conducted and shows that 46% of homes have a landline, with a margin of error of 3%. a.…
A: Given that a poll is conducted and shows that 46% of homes have a landline with a margin of error of…
Q: A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in…
A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…
Q: A Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15…
A: Solution : Given : n = 4220 confidence level = 95% Margin of error(d) = 2.2% and…
Q: All students who physically attended the graduation orientation were asked to write their mobile…
A: Given Information: All Students who were physically present on graduation orientation were asked to…
Q: ut of 200 people sampled, 28 said they prefer Coke over Pepsi. What is the point estimate for the…
A: It is an important part of statistics. It is widely used. Since the question has multiple sub parts…
Q: An auditor revlewed 25 oral surgery Insurance clalms from a particular surgical office, determining…
A:
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- On its municipal website, the city of Tulsa states that the rate it charges per 5 CCF of residential water is $21.62. How do the residential water rates of other U.S. public utilities compare to Tulsa’s rate? The file ResidentialWater contains the rate per 5 CCF of residential water for 42 randomly selected U.S. cities. Using the critical value approach, conduct the appropriate hypotheses to determine whether the population mean rate per 5 CCF of residential water charged by U.S. public utilities differs from the $21.62 rate charged by Tulsa. Use α = 0.05. Critical Value Approach Develop the null and alternative hypothesis Specify the level of significance, α Choose the test statistic (z or t) Use the level of significance to determine the critical value and the rejection rule Calculate the test statistic Compare test statistic to your rejection rule. Reject of Fail to Reject the null hypothesis Interpret the statistical conclusion in the context of the problem.A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if she wishes the estimate to be within four percentage points with 90% confidence, assuming that (a) she uses the estimates of 21.8% male and 18.1% female from a previous year? (b) she does not use any prior estimates?In a random sample of 74 homeowners in a city, 22 homeowners said they would support a ban on nonnatural lawn fertilizers to protect fish in the local waterways. The sampling method had a margin of error of±3.1%. Find the point estimate.
- The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 27 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 15 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use α = 0.01. Solve the problem using both the traditional method and the P-value method. Since the sampling distribution of p̂ is the normal distribution, you can use critical values from the standard normal distribution as shown in the table of critical values of the z distribution. (Round the test statistic and the critical value to two decimal places. Round the P-value to four decimal places.) test statistic = critical value = P-value = State your conclusion in the context of the application. There is sufficient evidence at the 0.01…The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 31 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 17 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use α = 0.01. Solve the problem using both the traditional method and the P-value method. Since the sampling distribution of p̂ is the normal distribution, you can use critical values from the standard normal distribution as shown in the table of critical values of the z distribution. (Round the test statistic and the critical value to two decimal places. Round the P-value to four decimal places.) Solve all parts of the question. test statistic = critical value = P-value =Do the states that voted for McCain have a different average percent of heavy drinkers than the states that voted for Obama in the 2008 election? 1. To answer the question of whether McCain states and Obama states have different average percent, heavy drinkers, we will use a 2 sample t-test. Why? 2. What should the hypotheses be for this test?
- A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within two percentage points with 95% confidence, assuming that (a)he uses the estimates of 21.5% male and 19.5% female from a previous year? (b)he does not use any prior estimates?Find the minimum sample size required to estimate the proportion of the population that supports a political candidate if the required margin of error is 0.042 and the level of confidence is 90%which statement is correct ( asnswer in few lines) 1 there is no sampling risk , if sampling plan is applied in a correct way 2 to determine the internal control devaitons , attribute sampling is very usefu l 3 an 8 % of tolerable rate is generally considered an acceptable rate
- A researcher wishes to estimate, with 95% confidence, the population proportion of adults who support labeling legislation for genetically modified organisms (GMOs). Her estimate must be accurate within 4% of the true proportion. Find the minimum sample size needed, using a prior study that found that 78% of the respondents said they support labeling legislation for GMOs.The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 26 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 14 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.01. Solve the problem using both the traditional method and the P-value method. Since the sampling distribution of p̂ is the normal distribution, you can use critical values from the standard normal distribution as shown in the table of critical values of the z distribution. (Round the test statistic and the critical value to two decimal places. Round the P-value to four decimal places.) test statistic = critical value = P-value =The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 28 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 14 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.01. Solve the problem using both the traditional method and the P-value method. Since the sampling distribution of p̂ is the normal distribution, you can use critical values from the standard normal distribution as shown in the table of critical values of the z distribution. (Round the test statistic and the critical value to two decimal places. Round the P-value to four decimal places.) I need help with test statistic and finding critical value