Suppose you compute a 93% confidence interval. What will happen to the confidence interval if you decrease the confidence level to 91%?

Q: test. It was found that 80 of them scored higher than 100. Based on this, compute a 95% confidence…

A: According to the given information in this question We need to construct 95% confidence interval

Q: (b) Estimate the sample size needed if no estimate of p is available. A sample of adults is needed…

A: here given that MOE = 0.05 , Confidence Level =  80% , .So area in both tail = 0.20 /2  = 0.10 Here…

Q: If n = 100 and p (p-hat) = 0.9, construct a 95% confidence %3D interval. Give your answers to three…

A: Givensample size(n)=100p^=0.9α=1-0.95=0.05α2=0.025zc=zα2=z0.025=1.96   (from z table)

Q: (a) Number of successes x= 135 (b) n = 640 (c) Probability of success p'= 0.21 (d) Probabilty of…

A: Given that  135 of the 640 96% confidence interval

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

A:

Q: Suppose you compute a confidence interval with a sample size of 100. What will happen to the…

A:

Q: Hospital records indicate that 52 men out of a sample of 1,000 versus 23 women out of a sample of…

A: Introduction: Denote p1, p2 as the true population proportions of heart disease among men and women…

Q: If n = 280 and ô (p-hat) = 0.8, construct a 90% confidence interval. Give your answers to three…

A: given data sample size (n) = 280p^ = 0.890% ci p.

Q: If n = 600 and p (p-hat) = 0.7, construct a 95% confidence interval. Give your answers to three…

A: It is given that, n = 600 and p (p-hat) = 0.7. we have to find the 95% confidence interval for true…

Q: article describes a study of 55 young adults with pierced tongues. The researchers found receding…

A: (a)given that,possible chances (x)=24size(n)=55success rate ( p )= x/n = 0.4364point of estimate =…

Q: A poll of n = 500 randomly selected elementary school students resulted in 110 of them stating…

A:

Q: If n = 220,p = 0.4,then what will be the 87.4% confidence interval for the population proportion?

A:

Q: Childhood obesity: A national health survey weighed a sample of 530 boys aged 6-11 and found that 78…

A: Given,n1=530x1=78n2=522x2=61p^1=x1n1=78530=0.1472p^2=x2n2=61522=0.1169pooled proportion…

Q: Answer true or false to each statement concerning a confidence interval for a population mean. Give…

A:

Q: Ten years ago, according to government records, 17% of the population of Elmwood had no health…

A:

Q: Express the confidence interval mathematically. Do not round answers.

A: Let  be the population mean number of hours adults work each week.Given that,Sample size Sample mean…

Q: A national organization conducted a survey of 1300 American adults and asked how many hours they…

A: sample mean()=40.5Margin of error(E)=0.8

Q: Part A: Make a 90% confidence interval for given that you have a sample of size 49 which produced a…

A: Given,margin of error(E)=0.2standard error(σ)=3.2α=1-0.90=0.10α2=0.05Z0.05=1.645      (from Z-table)

Q: Let's say you survey a random sample of 70 people. You ask the people in your survey if they prefer…

A: given data  n = 70 p = 0.53 95% ci for p margin of error (E) = ?

Q: A research found that 70% of 1500 randomly selected U.S. adults believe in global warming. Find the…

A: Solution: From the given information, p-hat=0.70 and n=1500.

Q: Suppose you are interested in the rate of autism among current school-aged children in Utah. You…

A: Given Information: Sample size n=400 Out of which 2 have had a previous diagnosis of an autism…

Q: A researcher found a 90% confidence interval for the proportion of restaurants which earned a profit…

A: From the provided information, Confidence interval is (0.489, 0.6518)

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: A study at Harvard found that 44% of their students binge drink. You are at Princeton doing a…

A:

Q: In a poll, Australians were asked if they thought unemployment would increase. At that time 263 out…

A:

Q: Suppose you compute a 99% confidence interval. What will happen to the confidence interval if you…

A: Answer: Suppose you compute a 99% confidence interval. What will happen to the confidence interval…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: A study has been conducted to compare male and female test performance on a standardised science…

A: When the sample size is increased the margin of error decreases, these affects the confidence…

Q: Think about a population mean that you may be interested in and propose a confidence interval…

A: Given sample, 2, 0, 1, 5, 0, 2, and 3. To estimate the confidence interval for a population mean we…

Q: A scientist claims that 65% of U.S. adults believe humans contribute to an increase in global…

A: Given  A scientist claims that 65% of U.S. adults believe humans contribute to an increase in global…

Q: A study found a confidence interval on the proportion of children that are hearing impaired was 0.04…

A: Given confidence interval is 0.04 to 0.16 i.e., p-E=0.04 -->1 p+E=0.16 -->2

Q: If n = 380 and X = 304, construct a 95% confidence interval for the population proportion, p. Give…

A: Given: n = 380 x = 304

Q: The report of a sample survey of 1,014 adults says, "With 95% confidence, the true population…

A: The objective of the question is to understand the meaning of the term '95% confidence' in the…

Q: If n = 140 and p (p-hat) = 0.8, construct a 95% confidence interval. %3D Give your answers to three…

A: We want to find the 95% CI for population proportion

Q: now find the 99% confidence interval given the same information, x=13

A: The given regression equation is y^=7+15x se=10.14X__=7n=22∑Xi-X__2=200

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.