Q4. You conduct a poll comparing two candidates. In a poll of 400 people, 190 prefer candidate A, and 210 prefer B. Q4e. If you want to shrink one stdev error to 1%, how many people do you need to survey?

Q: Apolster wishes to estimate the proportion of Unted ates voters who lavor capital punishment How…

A:

Q: A health psychologist wanted to test if discussing the health disparities of a patient with their…

A: given information :n=20      µ=40 ,σ=70,α=0.05 x_bar=56.7 hypothesis define: H0.u=40H1: μ not equal…

Q: A survey of 62 men found that 12 have a social media account. Another survey of 57 women found that…

A: Men are taken as group 1. Women are taken as group 2.   Given: n1=62x1=12n2=57x2=40α=0.07

Q: Using a random sample of 3800 TV households, a media research company found that 50.3% watched the…

A:

Q: In fall 2014, 34% of applicants with a Math SAT of 700 or more were admitted by a certain…

A: Let A be the event that student had Math SAT of 700 or more Therefore, PA=0.36 find The probability…

Q: Find the n amount, given that with a 95 percent confidence the error is by three percentage points…

A: Formula : Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

Q: What is the percentile rank of a student who is enrolled in 15 credits? (Hint: This is the same…

A: Given that , A survey of the population of 51 students asks how many credits students are taking and…

Q: Anna is 3 years old and in the 42nd percentile for height in her age group. What does this mean?…

A: Given: 1)Anna is 3 years old and, 2) In the 42nd percentile for height in her age group. In the…

Q: A sample with a mean of M=8 has an EZ= 56  how many scores are in the sample?   the number of…

A: Given that, Mean = M = 8 EZ= 56  n = ?   Definition of mean :  Mean is defined as sum of all…

Q: A health psychologist wanted to test if discussing the health disparities of a patient with their…

A: As we are authorized to answer only 3 subparts for each question and that you haven't specified…

Q: The results for a survey of 120. students who were selected randomly are listed below: • 60 students…

A: Given Data: The number of students in the survey is: n=120 The number of students has cell phones…

Q: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

Q: Approximately 7% of the population has the O- blood-type. If you drew a random and independent…

A: p= 0.07   n = 2065

Q: a. Explain what it would mean to make a type I error. Choose the correct answer below. A. A type I…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Q4. You conduct a poll comparing two candidates. In a poll of 400 people, 190 prefer candidate A,…

A: According to the question, in a poll of 400 people, 190 prefer candidate A and 210 prefer B.

Q: 2. A recent report on elementary schools in Kent county claimed that 13% of elementary students…

A: Let p be the population proportion  X=number of people typically walk to a school  n=random sample…

Q: Will, an art student, randomly sampled oil paintings in a museum. He wanted to find out how many oil…

A: Given :  Margin of Error  (E) = 0.02 The proportion of paintings that were created using the color…

Q: A sample has SS= 20 and s2 =4. How many scores are in the sample?

A:

Q: 1. Which of the following is closest to the percent of those surveyed who had a summer job? A) 22%…

A: Given Data :

Q: In fall 2014, 36% of applicants with a Math SAT of 700 or more were admitted by a certain…

A:

Q: Kai'Sa is doing her best to maintain her figure by following a strict calorie counting process.…

A: Given data Hypothesized mean µ= 370 Sample mean = 383 Sample Standard deviation s = 70 n = 60…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 226 women,…

A: Solution: State the hypotheses. Null hypothesis: H0: pl–p2=0 That is, there is no difference between…

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.55. What is the…

A:

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: David is doing a research project in political science to determine the proportion p of voters in…

A: Let p represents the proportion of voters in David's district who favor capital punishment. A. The…

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: Draw boxplots (by hand is the easiest) of the data for each year For the particular Year 2 that you…

A: Draw boxplots (by hand is the easiest) of the data for each year For the particular Year 2 that you…

Q: The owner of a bowling alley wants to estimate the percent of bowlers in the senior league. How…

A: Hi, you have posted multiple different question in one post . As per the guidelines I am obliged to…

Q: skipping lunch- A nutritionist wishes to determine, within 3%, the true proportion of adults who do…

A: It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Q: oward revisions in the health care system. The president wants the estimate to be within 0.02 of the…

A: The  population proportion (p) of people that supports  health care revisions is given as 0.61.  The…

Q: You are testing the daim that the proportion of men who own cats is larger than the proportion of…

A:

Q: A recent polls show that 61% of adult Americans are comfortable with the legalization of marijuana,…

A:

Q: nursing school professor is interested in determining how her college students compare to the…

A: Given, mean (µ) = 100 standard deviation (σ) = 20 Let X denote the exam score, then, X ~ Normal (µ =…

Q: The proportion of people that own cats is 80%. A veterinarian believes that this proportion is…

A: Given that, Sample size n=200 Population proportion p=0.80 Sample proportion of people who owned…

Q: Smith works as a welder inspector in a shipyard. He knows from keeping track of good and poor welds…

A: Let p denote the propprtion of poor welds. Given that p = 5% = 0.05 Sample size n = 300

Q: what is the predicted value for the return of GM given that the S&P500 return is 5% 2 The number of…

A: The regression equation is GM^=0.005860+0.904753S$P500.

Q: Using percentiles, the difference between which of the following is the interquartile range? Select…

A: Interquartile range: The interquartile range (IQR) is also called the midspread, middle 50%, or…

Q: Q2. Dr. King wanted to determine if a new treatment for ADHD was effective. He took four children…

A: For degrees of freedom:…

Q: 4. A student discovers that her grade on a recent test was the 65tm percentile. If 320 students took…

A: The grade of the student is the 65th percentile of the whole class.

Q: Hector is out on an archeological dig. He randomly selected 563 artifacts that he encountered at a…

A: Given Datan = no of artifacts encountered at a particular site = 563x = no of pottery shards =…

Q: health psychologist wanted to test if discussing the health disparities of a patient with their…

A: Here it is given that- Population mean (μ) = 40 Population standard deviation (σ) = 70 Total number…

Q: he personality trait of "Conscientiousness" (someone who is organized, responsible, and can control…

A:

Q: The Canadian Chiropodists Society states that  36 % of women wear shoes that are too small for their…

A: GivenMargin of error(E)=0.02p^=0.36confidence interval = 98%

Q: You are interested in the effectiveness of a new sample of 7 people's blood pressure before and…

A: By applying a paired 't'test, a)  sample size,n= 7 Mean (d̄) =Σd/n = 22/7 = 3.1429  standard…

Q: John Davis, a manager of a supermarket, wants to estimate the proportion of customers who use food…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 4. In statistics, the formula E = t can be used to calculate a margin of error. Solve this formula…

A: This exercise concerns changing the subject of the equation from E (error) to n( the sample size)

Q: Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the…

A:

Q: Solve the problem. Round the point estiamte to the nearest throusandth.  6) Find the point estimate…

A: Let X be the people had hearing aids  n be the random sample Given X=20, n=304

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

A: Given that no preliminary sample is taken to estimate the proportion of females. let the sample size…

Q: jocelyn estimates that a piece of wood measures 5.5 cm. if it actually measures 5.62 cm, what is the…

A: Given : Jocelyn estimates that a piece of wood is 5.5 cm. The actual measures 5.62 cm. The error is…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.