1225  children in 4  schools carried out a survey based  on  their schools on   drug related problems .The  children identified " frequent  drug taking " as  having 5  or more drugs in a row  3  or more times   in the  past 2  weeks.Hence  198 children werre  idenitified as  frequent  drug takers.   is the  sample  size  large enough to  make  a  valid  confidence  interval for  the   proportion (x) of students  who are  frequent  drug takers?

Q: A doctor would like to estimate the mean difference in height of pairs of identical twins. The…

A: The correct inference regarding the given interval of (-0.823, 0.573) is to be made from the given…

Q: There are 3000 beads of various colors in a jar. In a sample of 125 beads, 40% were red. Calculate…

A:

Q: A Dean of a certain business school is interested in the difference in proportions of A's given by…

A: Givenn1=800x1=240n2=800x2=160p1^=x1n1=240800=0.3p2^=x2n2=160800=0.2α=1-0.95=0.05α2=0.025zα2=1.96

Q: Suppose a TA wanted to estimate the proportion of students who failed Stat 119 for the 980 students…

A: Obtain the point estimate for the true proportion of students who failed the course. The point…

Q: Out of 400 people sampled, 32 had kids. Based on this, construct a 95% confidence interval for the…

A: Solution: Let X be the number of people had kids and n be the sample number of people. From the…

Q: suppose an individual was studying temperature's effect on crime rate. The researcher looked at 6…

A: Solution:The sample mean is obtained below:From the given information, number of observations is 6…

Q: An accounting firm has 1200 clients. From a random sample of 120 clients, 110 indicated very high…

A: Given : An accounting firm has 1200 clients So,  Population size (N) = 1200 Sample size (n) = 120…

Q: am interested if there is a difference in the mean amount that freshman and seniors spend on texts…

A: Given that random sample of 54 freshman and 52 seniors. Based on these samples a​ 95% confidence…

Q: The Centers for Disease Control and Prevention reported a survey of randomly selected Americans age…

A: Confidence interval for Proportions : The following is the formula for confidence interval of the…

Q: Of 127 randomly selected adults, 31 were found to have high blood pressure. Construct a 95%…

A: Given that, Of 127 randomly selected adults, 31 were found to have high blood pressure.  X = 31 N =…

Q: The lead levels in a random sample of 35 crows in the region were measured and recorded. The mean…

A:

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

A:

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A:

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: Given data X = 480 Sample size (n) = 500

Q: When 302 college students are randomly selected and surveyed, it is found that 122 own a car. What…

A: E have to find point estimate with with confidance interval..

Q: In a survey of 2896 adults, 1441 say they have started paying bills online in the last year.…

A: Given data X=1441 n=2896

Q: We want to estimate the proportion of vegetarian restaurants in a country. We observe 20 such…

A: We observe 20 such restaurants out of 100 p⏞ =xn=20100=0.5 90% confidence interval for the…

Q: In simple random sample of 150 of workers, 22 said their work place environment is toxic. Construct…

A:

Q: In a random sample of 500 adults, 410 described themselves as vegetarians. Construct a 95%…

A: We have been provided with the following information about the adults who describe themselves as…

Q: A survey of 45,535 adults showed that 20,901 were very concerned abut climate change. What is the…

A: It is given asFavourable cases, x = 20901Sample size, n = 45535Confidence level = 99%

Q: n a survey of 4026 ​adults, 708 oppose allowing transgender students to use the bathrooms of the…

A:

Q: A survey of 100 customers showed that 36 of them preferred brand B of a particular product. Give a…

A: p = proportion of people vote for BSample size : n = 100Number of favorable outcomes : x =…

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A:

Q: The First National Bank of Wilson has 620 checking account customers. A recent sample of 70 of these…

A: Given that,N = 620n = 70x = 37Confidence interval(c) = 0.95The formula of the margin of error…

Q: a survey of 3409 adults, 1445 say they have started paying bills online in the last year.  Construct…

A: The confidence interval = 99%The faovarble cases [x] = 1445The sample size [n] = 3409

Q: andom sample of 1200 high school freshmen was taken and it was found that 559 of them were reading…

A: The population proportion (p) will be proportion of high school freshman who reads at or above their…

Q: Construct a 9595​% confidence interval of the population proportion using the given information. x…

A: Given,x=175n=250α=1-0.95=0.05α2 =0.025Z0.025 =1.96Sample proportion(p^)=Xn p^ =175250 =0.71-p^…

Q: In a sample of 300 people, 48 identified as dog owners. Construct a 99% confidence interval for the…

A: Obtain the 99% confidence interval for the true proportion of people who are dog owners. The 99%…

Q: A sample of 400 homeowners includes 124 that expect their home to increase in value in the next…

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

Q: Out of 54 randomly selected patients of a local hospital who were surveyed, 42 reported that they…

A: Given that, The total patients n are 54 and the total patients who were satisfied x are 42.

Q: A survey found that 39 of 66 people who don't drink coffee often have trouble sleeping and 44 of 88…

A: Solution: Let X1 be the number of noncoffee drinkers who have trouble sleeping, n1 be the sample…

Q: 82 adults selected randomly from one town, 66 have health insurance. Find a 90% confidence interval…

A:

Q: In a survey of 2,480 It's Always Sunny in Philadelphia fans, 17% said they have played Night…

A: We have to find out confidence interval for given data...

Q: Of 2019 employees selected randomly at a company, 10% of them commute by carpooling. Construct a 90%…

A:

Q: A sample of 421 adults showed that 239 of them are connected to the Internet from home.  Construct…

A: From the provided information, Sample size (n) = 421 From which 239 are connected to the Internet…

Q: confidence interval for a population mean is (56,78), with a margin of error of 11. What is the…

A: From provided information, Confidence interval for population mean is (56, 78), with margin of error…

Q: In a randomly selected group of 650 automobile deaths, 180 were alcohol-related. Construct a 95%…

A:

Q: 5. Asample of 350 engineering applicant included 140 women. Find the 95% confidence interval of the…

A: Given: Sample size, n=350 No. of women, x=140

Q: A random survey of 36 airline passengers indicates that twelve have never flown before. Find a 95%…

A: We have given that,  Sample size (n) = 36 and favorable cases         (X) = 12 Then,  We Will find…

Q: A research poll of 1501 adults showed that 1051 of respondents believe in global warming. Find a 98%…

A:

Q: In a random survey of 2221 North Americans 689 of them had blood type A+. Construct a 94% Confidence…

A:

Q: The American Heart Association is about to conduct in anti smoking campaign and wants to know the…

A: Solution: Out of a sample of 1421 Americans over 35, 412 smoke.  Sample size: n = 1421 The number of…

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.