College officials want to estimate the percentage of students who carry a gun, knife, or other such weapon. How many randomly selected students must be surveyed in order to be 93% confident that the sample percentage has a margin of error of 1.5 percentage points? (a) Assume that there is no available information that could be used as an estimate of ?̂ . Answer: (b) Assume that another study indicated that 5% of college students carry weapons. Answer:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: (a) The proportions are 22.2% for males and 18.7% for females, The margin of error is 3%, and…

Q: What is the  p-value for a sample of 220 undergraduate students with a sample mean credit card…

A: b)

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: 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 physical therapist wants to determine the difference in the proportion of men and women who…

A: Given data, P1 = 21.9% = 0.219 P2 = 14.4% = 0.144 E = 2% = 0.02 Z= value at 95% confidence is Zc =…

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: Why can't you just use the sample mean to estimate the population mean without including a margin of…

A: Why can't you just use the sample mean to estimate the population mean without including a margin of…

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: Suppose you select a simple random sample of 75 Douglas College students, and you find that 8 are…

A: The point estimate of the population proportion is the sample proportion. Given that, 8 out of the…

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: A physical therapist wants to determine the difference in the proportion of men and women who…

A: c = 95% E = 2% = 0.02 p^1=0.215p^2=0.195

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Solution: Given information: p1^=0.219 Sample proportion of male p2^=0.197 Sample proportion of…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A Gallup poll recently asked 6007 randomly selected American adults by telephone the question: "Are…

A: We are authorised to answer three subparts at a time since you have not mentioned which part you…

Q: Suppose the U.S. president wants to estimate the proportion of the population that supports his…

A: Critical value: The value of α is 0.05 for 95% confidence level. Using excel formula…

Q: A survey asked, "Do you think that homeless people are responsible for the situation they are in?"…

A: Solution: a. Let X be the number of Americans who think that homeless people are not responsible and…

Q: f children in high school felt it was a serious problem that high school students were not being…

A: Given: n= 800 p=0.46Now, np = 800* 0.46=368 >10 (Greater than 10) n(1-p) = 800* (1-0.46)=432 >…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96, p=0.54 and E=0.02.

Q: 3. A Gallup poll conducted in 2010 found that 494 of 1050 adult Americans believe it is the…

A: Given that  Sample size n =1050 Favorable cases x =494 Sample proportion p^=x/n  =494/1050 =0.4705

Q: intended population

A: A population is the entire group that you want to draw conclusions about   Intended population:…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: a) Compute the required sample size using the formula: E=zα2 p⏞11-p⏞1n+p⏞21-p⏞2n   Where 'E' is the…

Q: If a manufacturer conducted a survey among randomly selected target market households and wanted to…

A: question: If a manufacturer conducted a survey among randomly selected target market households and…

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A: From the provided information, Sample size (n) =750 and p0 = 0.54

Q: A recent survey estimated that 19 percent of all people living in a certain region regularly use…

A: The 100 (1 – α)% confidence interval provides an interval estimation of the required population…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

Q: ple of 1000 Americans, it was discovered that 920 of them lived in neighborhoods with acceptable…

A: The point estimate (sample proportion) of the sample of size n can be defined as: p^=xn  Here, x =…

Q: What is a sampling distribution of means? Use your knowledge of the standard error of the sample…

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: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Percentage of level of confidence is 95%. Here, margin of error is, E=0.03.

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: The hypothesis tests, contain two hypothesis: null hypothesis and alternate hypothesis. The…

Q: etermine what percent of pre-kindergarten children ages 3 to 5 whose mother had a bachelor's degree…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high…

A:

Q: A politician wants to estimate the proportion of the voting population in the district who favor the…

A:

Q: Twenty years ago, 53% of parents of children in high school felt it was a serious problem that high…

A:

Q: d. University administrators would like to conduct a new survey in May to update this estimate. They…

A: Given: Margin of error (E) = 2.25% = 0.0225 Confidence level = 98% The estimate from the previous…

Q: What is the p-value for a sample of  100 undergraduate students with a sample mean credit card…

A:

Q: We are interested in conducting a study in order to determine what percentage of voters of a state…

A:

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: What is the symbol for the best point estimate for the true proportion? What is the symbol for the…

A: A point estimate is defined as the single value that is calculated from the sample data to estimate…

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high…

A: Denote p as the true proportion of parents, who think that high school students were not being…

Q: How much "error" is too much before you are no longer confident about your estimates or research…

A: Given information: Margin of error is defined as the half the width of the confidence interval.

Q: A survey asked, "Do you think that homeless people are responsible for the situation they are in?"…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given Error, E=±0.05CL=0.99

Q: .  What calculation is used as an absolute estimate of the reliability of a test, taking into…

A: The standard error of measurement (SEM) is an absolute measure of a test's dependability.It contains…

Q: Twenty years ago, 52% of parents of children in high school felt it was a serious problem that high…

A: using the given data fill all the blanks required

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.