A poll of n = 500 randomly selected elementary school students resulted in 110 of them stating history was their favorite subject. Find the 99% confidence interval for the estimate of the population proportion of all elementary school students who would consider history their favorite subject. Round the lower and upper limits of the interval to two decimal places.

Q: Of 500 random people surveyed, 72 were smokers.  Find the 95% confidence interval. SE=0.0157

A:

Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

A:

Q: I've asked 91 students on Monday whether they did their homework over the weekend. 20 of them said…

A:

Q: A college counselor wants to determine if the number of hours spent studying for a test can be used…

A: An explanatory variable is the one which can be changed independently or what you manipulate or…

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,140…

A: given data  n1 = 144140   x1 = 84545p^1 = x1n1 = 84545144140 = 0.5865 n2 = 216298    x2 = 126501p^2…

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: A poll of 1060 adults in a country was conducted by telephone. Of those surveyed, 169 had…

A: The sample size is 1060 and number of success is 169.

Q: find the z-number associated with a 92% level of confidence. find the z-number associated with a…

A:

Q: A professor wanted to know what proportion of college students believe in ghosts. She polled 200…

A:

Q: A poll of 1468 U.S. adults found that 44% regularly used Facebook as a news source. Find the…

A: Given information Sample size (n) = 1468

Q: researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 520…

A:

Q: A federal report indicated that 17% of children under age 6 live in poverty in Nevada, an increase…

A: Given data, p=17%=0.17 E=2%=0.02 z-value at 99% confidence is Zc=2.576 n=?

Q: T.J. wants to estimate the percentage of college students who have taken out student loans. He…

A:

Q: If a person’s z score equals -2.02, what is their percentile?

A: Given problem Given that   Given Person's z score =  -2.02 Using the Standard Normal Table ( Z Table…

Q: Your instructor has the Mid-Term examination grades. He told you that the 25th percentile is 51 and…

A: Given that, Your instructor has the Mid-Term examination grades. He told you that the 25th…

Q: The research question is whether attractiveness affects the behavior of infants looking at…

A: Here μ=10, M=13, n=9 and SS=72. s=SSn-1=729-1=3

Q: In one city, 59.6% of the 1500 students surveyed said they eat at the school cafeteria. Find the 95%…

A: Given, Sample size=n=1500 p^=0.596 α=0.05

Q: A professor has recorded exam grades for 40 students in his​ class, but one of the grades is no…

A: From the provided information, Number of students = 40 The score on the exam was 82. The mean of the…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

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Q: Suppose there are 30 students in a class. the18 male students in the class have a mean score of 72,…

A:

Q: A survey of 100 men found that 68% said they find it hard to buy holiday gifts that convey their…

A: Solution

Q: The mean earning of men in Florida differs significantly from the mean earning of men in Texas. If…

A: Sample sizesn1 is 123 and n2 is 88.

Q: x=111, n=194, Confidence level = 99%

A: The sample proportion of p is, p^=xn=111194=0.5722 Computation of critical value:…

Q: BCD Travel wants to estimate the population proportion of adults who favor historical sites for…

A: p^ = 59% = 0.59Sample size = 24086% confidence level

Q: When 290 college students are randomly surveyed, it is found that 120 own a car. Find a 99%…

A: Given that, x=120,n=290 The sample proportion is, Critical values: By using the standard normal…

Q: At the Fredericton High School it is estimated that at most 25% of the students ride bikes to…

A: Let, p = proportion of students who ride bikes to school

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: Find  z for a  90% confidence level. Round your answer to two decimal places.

A: Given confidence level is 90% Significance level is 10%

Q: a reading test. Shaylen's score of 455 was higher than the scores of 4276 of the 7212 students who…

A: Given a reading test, Shaylan's score of 455 was higher than the scores of 4276 of the 7212 students…

Q: A machine makes sticks of butter whose average weight is 4.0 ounces. The SD of the weights is 0.05…

A:

Q: The figure to the right shows the results of a survey in which 2500 college graduates from the year…

A: Expected to their first employer for 3 or more years: The sample size n= 2500.for The sample…

Q: A researcher wanted to estimate the proportion of undergraduate college students (18– 29 years) with…

A:

Q: in how you determined your findings. How many children scored lower than Emily? How many children…

A: The standard normal variate of the normal distribution is continuous and follows that z~N(0,1). The…

Q: If a person’s z score equals 2.08, what is their percentile?

A: Given info: The person’s z score equals 2.08.

Q: Of the 1,000 people, 550 people used company s's smartphone and 460 people used company a's…

A: Given: n= 1000 ,x= 550.0 At 95.0 % confidence level , z score= 1.96 Need to find confidence…

Q: Construct the 99% confidence interval for the difference when 3-47688, -318.32, -42.11, -2680, -19,…

A: Test hypothesisNull Hypothesis H0: μ1=μ2Alternative Hypothesis Ha: μ1≠μ2For group 1 Sample size…

Q: f someone scored a 17 when the mean is 19 with a SD of 5, what would their score be if the mean were…

A: given data if some one scored 17   x1=17μ1=19σ1=5 we have to find the score =X2 be if the mean =μ2…

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.