In a recent poll, 100 people were asked if they liked dogs, and 12% said they did. Find the Margin of Error for this poll, at the 99% confidence level. Give your answer to four decimal places if possible.

Q: A random sample of adults were asked how many minutes they watch TV each week and found that the…

A: Given that, The variable of interest is how many minutes adults watch TV each week. The median is…

Q: What percentage of those who play guitar, also play piano given the following information. 18…

A: What percentage of those who play guitar, also play piano given the following information. 18 - play…

Q: Approximately 10% of students have a composite score below what level

A: If X is the composite score of the students, then we need to search for a x, such that P[X≤x]=0.1.

Q: A group of 100 students was surveyed about their interest in a new International Studies…

A: Given: Number of students with high interest (frequency with high interest) = 30 Total number of…

Q: According to a Gallup poll taken on September 10th, 1998, 31% of a sample of adults thought that…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: When taking a 29 question multiple choice test, where each question has five possible answers, it…

A: Solution 10 or More questions are unusual

Q: those polled answered the economy. Construct a 93% confidence interval for the proportion of voters…

A: It is given that, the sample size, i..e, the sampled no. of voters, .The no. of voters, who answered…

Q: (a) Identify the null and alternative hypotheses. (b) Determine if the sample size is large enough…

A: The following information is provided: The sample size is N=631N = 631, the number of favorable…

Q: For a 10 point quiz, the professor recorded the following scores for 8 students: 7, 8, 3, 9, 10, 6,…

A: Need to  Calculate Mean from the following data7,8,3,9,10,6,8,5

Q: A set of data has a mean of 16,  a median of 15 and a mode of 14. which of these numbers must be…

A: From the information, the mean is 16, median is 15 and mode is 14.

Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

A: The results from a poll of 2000 adults who are asked to identify their favorite pie among them 12%…

Q: he teacher collected the scores of her students in their remedial test. Data showed that three…

A: Given that  The teacher collected the scores of her students in their remedial test.   Three…

Q: When taking a 32 question multiple choice test, where each question has five possible answers, it…

A: According to range rule of thumb observation above 2 standard deviation of mean and observation…

Q: A data set has five values. The smallest value is 13. The median is 18. The mode is 27. What is the…

A: Solution

Q: The mode of five numbers is 1,the median is 5 and the mean is 4.Find the numbers

A: Let the five numbers be a,b,c,d and e. From the given, the mode of these numbers is 1. Thus, it can…

Q: a. What test will you do? b. What are the hypotheses? c. What is the decision rule? d. Calculate the…

A: b) The null and alternative hypotheses are below: H0 :There is no difference in the mean scores of…

Q: For the data set:   5,  11,  1,  2,  27,  30,  15  we would have the middle number being 2.  Why…

A:

Q: A national survey of 1000 adult citizens of a nation found that 18% dreaded Valentine's Day. The…

A: Solution: Given information: n= 1000 Sample size  p^= 0.18  Sample proportion of adult of citizens…

Q: A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A…

A: The random variable is who have seen or sensed the presence of an angel.We have to test whether the…

Q: When taking a 17 question multiple choice test, where each question has five possible answers, it…

A:

Q: An article in a newspaper states that the proportion of traffic accidents involving road rage is…

A: The proportion of traffic accidents last year is 10%.

Q: two exams were given to a class. The scores on the first exam ranged from 30 to 90, and the scores…

A: The mean is the mathematical average of a set of two or more numbers.So,Mean = Sum of…

Q: In a survey that asked individuals about their favorite styles of music, 37 replied rock, 27 said…

A: Mode: Mode is the value, which has the highest frequency among all other values of the observation.

Q: Twenty-nine college students, identified as having a positive attitude about Mitt Romney as compared…

A: a.Here, the sample size is 29 that is reasonably small. The population standard deviation is unknown…

Q: According to a recent​ census, 14.9​%of all housing units in a certain country are vacant. A county…

A: Solution-: Given: We take, We find p-value=?

Q: A recent poll of Ms. Vergara's 160 students revealed the following.  They were asked if they did or…

A: Let U be the set of all students. Now U=160. A denotes the set of all students who studied hard for…

Q: A consumer group wanted to determine if there was a difference in customer perceptions about prices…

A: Here it is given that a consumer group wanted to determine if there was a difference in customer…

Q: The sports coaches at West High School believe that 12% of their students play soccer. In a sample…

A: Given,population proportion(P)=0.12sample size(n)=155and X=21sample proportion (p^)=xnp^=21155=0.135

Q: The director of student services at Oxnard College is interested in whether women are less likely to…

A: Note: Since you have posted a question with multiple subparts, we will solve the first three…

Q: A new treatment is discovered that improves survival probability from 85 to 95 percent. Discuss the…

A: New treatments and medicines reduced the expenses and at the same time survival probability from 85%…

Q: A report states that the mean household income last year for a certain rural county was $55,300 and…

A: Given,Mean = $55,300Median = $62,800We know that, The distribution is right-skewed when the mean 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.