84 out of a random sample of 125 students found their math textbook unreadable. Find population proportion for this sample.  Find a 90% confidence interval for p, the true proportion of all students who found their math textbook unreadable. Based on your result in b), is it reasonable to conclude that fewer than 75% of all students find their math textbook unreadable?

Q: A survey of 800 women shoppers found that 17% of them shop on impulse what is the 98% confidence…

A: Sol:- To calculate the 98% confidence interval for the proportion of women shoppers who shop on…

Q: Let X be the outcome of rolling a fair six-sided dice. The possible outcomes for X are 1,2,3,4,5 and…

A: X 1 2 3 4 5 6 P(X) 1/6 1/6 1/6 1/6 1/6 1/6

Q: In a sample of 120 adults, 114 had children. Construct a 99% confidence interval for the true…

A:

Q: A  95% confidence interval for the  proportion of voters who say "they want change" is computed and…

A: From the provided information, Confidence level = 95% Confidence interval for the proportion is…

Q: Variety magazine recently ask a random sample of readers if Disney Plus was "as good as" Netflix.…

A: The 90% confidence interval is [0.4575, 0.5225]

Q: In a sample of 120 adults, 102 had children. Construct a 99% confidence interval for the true…

A: Sample size n=120Favorable cases x=102Sample proportion p^=x/n=102/120=0.85

Q: A graduate Statistic Student wants to estimate the true proportion of county college ( "c.c.")…

A: we have given that  sample size N=100 ,favorable cases X=64 sample proportion P^=X/N

Q: A survey of 120 female freshmen showed that 9 did not wish to work after marriage.  Find the 99%…

A:

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, 344 had kids. Based on this, construct a 99% confidence interval for the…

A: Given that sample size n = 400 Number of peoples with kids, X = 344 The critical value of Z at 99%…

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: A  95% confidence interval for the  proportion of voters who say "they want change" is computed and…

A: For the population proportion, the confidence interval can be computed using the formulae: C.I=p⏞±E…

Q: Out of 300 people sampled, 138 had kids. Based on this, construct a 90% confidence interval for the…

A: Given data, n=300 x=138 p=x/n=138/300 =0.46 z-value at 90% confidence is Zc=1.645

Q: A bank randomly selected 253 checking account customers and found that 115 of them also had savings…

A: Given information: It is given that a bank randomly selected 253 checking account customers and…

Q: A group of 8 students were given the same standardized test twice to see whether retaking the test…

A: It is given that .

Q: The university is trying to estimate the percentage of students who failed more than two courses. In…

A: Step-by-step procedure to obtain the value of  using STATKEY:Choose Normal under Theoretical…

Q: uppose a researcher collected data with n = 200 and came up with a sample mean of 83 and 95%…

A: Given n=200 Mean=83

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

A:

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: Out of 400 people sampled, 68 had kids. Based on this, construct a 99% confidence interval for the…

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

Q: Out of 300 people sampled, 228 had kids. Based on this, construct a 90% confidence interval for the…

A: Introduction Sample size, n=300 No. of people who had kids, x=228 CL=0.90

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: In a sample of 270 adults, 173 had children. Construct a 99% confidence interval for the true…

A: The sample size n= 270. The sample proportion is 173/270. The absolute value of Zα/2 is 2.5758 using…

Q: Out of 600 people sampled, 528 had kids. 1. The best point estimate for p is  2. The margin of…

A: Given: n = sample size = 600 x = 528 Part 1: The point estimate for p is computed as,…

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: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: In a sample of 360 adults, 245 had children. Construct a 99% confidence interval for the true…

A:

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 95% confidence interval for the average salary of all CEOs in the electronics industry was…

A: Given Sample size =40

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

A:

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

A:

Q: In a sample of 85 statistics students, 41 said that finding confidence intervals for population…

A: It is given that x is 41 and sample size (n) is 85. The confidence level is 0.99.

Q: Out of 500 people sampled, 95 had kids. Based on this, construct a 90% confidence interval for the…

A:

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

A:

Q: Construct a 95% confidence interval for the true proportion of checking account customers who also…

A:

Q: Find a 95% confidence interval for the true population proportion.19)In a survey of 227 adults, 28%…

A:

Q: In a sample of 470 adults, 306 had children. Construct a 99% confidence interval for the true…

A:

Q: In a sample of 460 adults, 281 had children. Construct a 90% confidence interval for the true…

A:

Q: A recent survey showed that 42% of US employers were likely to require higher employee contributions…

A: The proportion of all companies likely to require higher employee contributions for health care…

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.