When the 2000 GSS asked whether human beings developed from earlier species of animals., 53.8% of 1095 respondents answered that this was probably or definitely not true  Question: Find the standard error and 99% confidence interval for the corresponding population proportion. and how would you interpret the 99% confidence

Q: In a sample of 226 Americans, the mean annual sugar consumption was 148 pounds with a standard…

A: The sampling distribution of a sample mean follows a normal distribution with the mean converging…

Q: Suppose the NCES would like to re-do their study. If they want a 95% confidence interval with a…

A:

Q: A random sample of 25 statistics students was asked: "Have you smoked a cigarette in the past week?"…

A: From the provided information, Sample size (n) = 25 Six students reported smoking within the past…

Q: A national air traffic control system handled an average of 47,189 flights during 29 randomly…

A: The sample size is 29The sample mean is 47189The sample standard deviation is 6351We have to…

Q: If you need to make a 98% confidence interval for a proportion, and the margin of error is to be no…

A: Given information:  Confidence level = 98% Margin of error (e) = 0.025 Let proportion (p) = 0.5 The…

Q: Suppose that a random sample of 142 graduate-admissions personnel was asked what role scores on…

A: Given : Random sample of 142 graduate-admissions personnel Sample size (n)=142 Let X : No. of…

Q: In a Harris poll of 630 human resource professionals, 37.4 % said that they had at least one child…

A: Confidence interval is an interval such that the probability of the unknown parameter to be included…

Q: The 2010 General Social Survey asked the question: "For how many days during the past 30 days was…

A: In statistical inference an investigator wants to know about the population parameters. But for…

Q: Construct a 99% confidence interval estimate for the population mean, N = 36, ?̅= 135, σ = 24

A: As the population standard deviation σ is not known, we will use z-distribution.  The value of z at…

Q: n a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: Solution: x (x-x) (x-x)2 6 -0.75 0.5625 8 1.25 1.5625 2 -4.75 22.5625 10 3.25 10.5625…

Q: We are trying to estimate the average lifespan of all Neanderthal humans who lived 100,000 years…

A: Given: Sample of 56 skeletons from caves and construct a 95% confidence interval for their…

Q: A Gallup Youth Survey in 2001 found that of 501 randomly selected teenagers in the U.S., 271 of them…

A: Given Total number of teenagers selected = 501Number of teenagers said who get along with their…

Q: Among the 34,506 people who​ responded, 63​% answered​ "yes."   Use the sample data to construct a…

A: Given data: Total number of people who responded for the question presented by online site, n =…

Q: In a survey, 1000 adults in a certain country were asked how many hours they worked in the previous…

A: Confidence interval used to obtain the range where the population true mean lies. It explain the…

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 437 green peas…

A:

Q: Pew Research Center survey asked a variety of science questions of independent rande public…

A: The value of z at 98% confidence level is 2.326, which can be obtained by using the standard normal…

Q: We are interested in comparing the percentage of females versus males who expect their future to be…

A: Summarising the given information below. The number of total surveyed females and males:…

Q: Suppose we observed 15 successes in a random sample of 60 subjects. What is the 99% confidence…

A:

Q: periment with peas resulted in one sample of offspring that consisted of 419 green peas and 159…

A: a. The value of z at 95% confidence level is 1.96 (from z table). The sample proportion is computed…

Q: a newspaper article stated that the us supreme court received 812 letters from around the country on…

A: To find the 95% confidence interval for the true proportion of all American adults who feel that…

Q: The US Treasury found that a random sample of 1309 $20 bills found that 837 of them had trace…

A:

Q: Suppose you are planning to construct a 23% confidence interval for a one sample population…

A: We have given that confidence level (c) = 23% = 0.23

Q: Estimate 95% confidence interval for the proportion of household experiencing burglary in 2010."

A: 25.8 households per 1,000 were the victims of home burglary. These data are obtained from a survey…

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A:

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: For given sample, x¯=6.6667, from the excel function, =AVERAGE(G17:G28)s=2.2697  from the excel…

Q: It is believed that slightly over 50% of Americans own pets. A 95% confidence interval for the…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Out of 67,410 surgeries tracked in a study in the U.K., 2832 were followed by surgical site…

A: Given informationWe have given that out of 67,410 surgeries tracked in a study in the U.K., 2832…

Q: Random samples of 110 homes in Kingston, Ontario (₁) and 100 homes in Owen Sound, Ontario (1₂) were…

A: The confidence interval is the method of the interval estimation used for the estimating the value…

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A: Compare the length from the formula to the length of given confidence interval.

Q: In a random sample of 575 American goods, about 46.3% of them were transported by rail in 2017.…

A: Given,   Sample size = 575 Sample proportion = 0.463   Critical value: Using z-table, the z-critical…

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

Q: survey conducted by Gallup in 2020 asked 1,102 randomly selected U.S. adults, "What do you think is…

A: We have given that  Sample size n=1102 90% confidence interval.  = (0.6773, 0.7227)

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A: Comparing the length of interval.

Q: From a random sample of 64 high school seniors, the sample mean and standard deviation of the math…

A:

Q: a) What proportion of workers answered yes to the survey? b) What was the margin of error?

A: Here, the 95% confidence interval for the proportion of workers that answered 'yes' is (0.62, 0.73).…

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A:

Q: In a study of the relationship between alcohol use and bicycling fatalities, the researcher…

A:

Q: In a sample of 95 recommendations, it is found that 56% of them made money. Determine the upper…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: From a random sample of 120 students, 95 rated a case of plagiarism as unethical. Using this…

A: Confidence length = upper limit - lower limit

Q: a random and independent sample of 4000 students 35% of them were in favor of more online courses.…

A: It is given that n =4000 and p value is 0.35.

Q: A newspaper article stated that the US Supreme Court received 812 letters from around the country on…

A: To find the 95% confidence interval for the true proportion of all American adults who feel that…

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.