A study reported that 46% of Internet users have searched for information about themselves online. The 46% figure was based on a random sample of Internet users. Suppose that the sample size was n = 400. In USE SALT Construct a 90% confidence interval for the proportion of Internet users who have searched online for information about themselves. (Round your answers to three decimal places.) Interpret the interval. O we are 90% confident that the proportion of all Internet users who have searched online for information about themselves is within this interval. O we are confident that 90% of the proportion of all Internet users who have searched online for information about themselves is within this interval. O we are confident that the proportion of all Internet users who have searched online for information about themselves is within this interval 90% of the time. O we are 90% confident that the proportion of all Internet users who have searched online is within this interval.

Q: For a statistics test the mean is 63 and the standard deviation is 7.0, and for a biology test the m...

A: We know that ,Z-score=x-μσ

Q: Assume that when adults with smartphones are randomly​ selected,47​% use them in meetings or classes...

A:

Q: You are testing the claim that the mean GPA of night students is different than the mean GPA of day ...

A: Given Data: x¯1=2.67        n1=30          s1=0.97x¯2=2.86        n2=45          s2=0.74   Calculati...

Q: An unknown distribution has a mean of 90 and a standard deviation of 15. Samples of size n = 25 are ...

A:

Q: A computer selects a number XX from 2 to 7 randomly and uniformly. Round all answers to 4 decimal pl...

A:

Q: For items 25 to 26: A farmer has decided to use a new additive to grow his crops. He divided his far...

A: The data on the record of the corn yield (in bushels) relating to the before and after usage of the ...

Q: 7) Find the indicated IQ score. The graph depiets IQ scores of adults, and those scores are nomally ...

A: We have to find probability using z table. 

Q: just the last part thank you!

A: GivenA hypothesis is conducted to compare two proportionsThe Test statistic is 3.60The p value is 0....

Q: People often have to replace their wedding ring due to it being lost, damage destroyed etc. the foll...

A:

Q: Assume that a procedure yields a binomial distribution with a trial repeated n = 6 times. Use either...

A: Given,n=6p=0.34k=no.of successesk~Binomial (n=6 , p=0.34)P(X=k)=ckn pk (1-p)n-k ; k=0,1,2,....n

Q: The least square line for the following sample data is: x 420 610 625 500 400 450 550 650 480 565...

A: Given,  

Q: Use the given information to find the number of degrees of​ freedom, the critical values χ2L and χ2R...

A:

Q: In a random sample of size 11, N(mu, phi) population, obtain 90% confidence interval for standard de...

A: Sample size n= 11 Sample variance s2= 28 And the critical values of Chi-square at (n - 1) = 10 degre...

Q: Need help with parts (g) and (i). Data for the question is typed and attached as an image. Cost ...

A:

Q: Answer 1, 2, 3

A: We need to use the concept of regression analysis. 

Q: For this grouped data set: Scores      |      Frequencies 30-34        |      7 25-29        |      ...

A:  

Q: Round all probabilities to four decimal places

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: Using excel  Show how can we select simple random sample for 8 students, and estimate the mean,varia...

A: In simple random sampling we can select sample randomly without any pattern. First we enter the rand...

Q: In the following problem, check that it is appropriate to use the normal approximation to the binomi...

A: Given information- We have given a problem of the binomial distribution. Probability of all new prod...

Q: I don't understand this question I need help solving it.

A: 2. Let x be the incomes are approximately normal distribution with mean $33,000 and standard deviati...

Q: Construct and interpret a 95% confidence interval for the average height of males    Males: Sample S...

A:

Q: Find the area or region that corresponds to each of the following z values. Sketch and label each cu...

A: Note: Since you have posted questions with multiple subparts we will solve the first three questions...

Q: Express the confidence interval 0.111<p<0.777 in the form p± E. ptE =

A:

Q: Approximate the area under the t - curve, with degrees of freedom 29, to the right of t = 2.462

A: Given ,degrees of freedom(df)=29and t=2.462

Q: Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). T...

A:

Q: The academic qualification such as primary, secondary, Diploma, Bachelor’s degree,Master’s degree an...

A: From the given information we want to know about type of variable and level of measurement.

Q: In certain experiments, the error made in determining the density of a substance is a random variabl...

A: Let a random variable X has a uniform distribution with the parameters α and β The density function ...

Q: In a recent survey in the UK, it was found that about 85% of UK smokers are very much aware that smo...

A: Given :In a recent survey in the UK,  The poll questioned 1,000 UK residents by telephone between 11...

Q: Answer 1, 2, 3

A: For the given 3 parts, we need to use the concept of statistical inference. 

Q: NEED ANSWER TO ALL PLZ ASAP

A: Given: Population mean =5 Sample mean=4.8 sample standard deviation=2.4 sample size=14 Level of sign...

Q: A population consist of 5, 10, 15, 20, 25. Consider the sample of size 2 that can be drawn from this...

A: Given : Population consist of 5,10,15,20,25 Population size : N = 5 sample size : n =2 We want to fi...

Q: Practice Activity 2 Game of Chance Problem (A Roulette Wheel) A roulette wheel in a fiesta carival h...

A: INTRODUCTION :  Definition : Probability : let S be the sample space of a random experiment. with wh...

Q: 1. The lifetime of a 75 watts lightbulb is normally distributed with mean µ hours and variance σ2. F...

A:

Q: What z-score has an area of 0.0023 on its right side under the standard normal bell curve?

A: Introduction: Denote Z as the standard normal variable, which has mean 0 and standard deviation 1.

Q: Assume that military aircraft use ejection seats designed for men weighing between 149.3 lb and 209 ...

A: Given data,μ=169.9σ=40.5P(149.3&lt;X&lt;209)=?

Q: Referring to the same data/computations above (repeated here): Standard Deviation Groups Grp-1 (8 or...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a ti...

Q: The following is sample data taken from a distribution where the underlying population is normally d...

A:

Q: A manager wishes to see if the time (in minutes) it takes for their workers to complete a certain ta...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.94...

A: We have to find probability using z table. 

Q: Each year, more than 2 million people in the United States become infected with bacteria that are re...

A: Denote p1, p2 as the true population proportions of drug-resistant cases in the first and second cit...

Q: In Oct. 2008, scientists tested cord blood samples for 20 newborn infants in USA. The scientists wer...

A: Given,sample size (n)=20sample mean(x)=127.45standard deviation (s)=25.965α=1-0.90=0.1α2 =0.05degree...

Q: The testing times for a group of college students were normally distributed with a mean of u= 30 min...

A: We have to fill blank using empirical rule. 

Q: Find the critical value z,/2 that corresponds to the confidence level 90%. Za12 (Round to two decima...

A:

Q: A statistics professor plans classes so carefully that the lengths of her classes are uniformly dist...

A: Uniform distribution: A continuous random variable X is said to follow Uniform distribution if the p...

Q: A cell phone company charges $112.75 per month plus $0.25 per data usage over 1000 texts messages. H...

A: The company charges $112.75 per month Additional charge $0.25 per 1000 text messages. Total budget f...

Q: Suppose the average weight loss for someone on a diet (in the population) is 15 pounds. A sample of ...

A:

Q: The data below represent the prices of different items in a supermarket, construct the frequency tab...

A: According to the answering guidelines, we can answer only three subparts of a question and the rest ...

Q: d) Hence test whether ? is significant. Give reasons for your answer. e) Perform the F Test making s...

A: Given : Dependent variable - Yearly Foreign Reserves Independent variable - Annual oil prices, yearl...

Q: The data regarding the production of wheat in tons (X) and the price of the kilo of flour in Ghana c...

A:

Q: A simple random sample from a population with a normal distribution of 104 body temperatures has x=9...

A: Solution We have to construct an 80​% confidence interval estimate of the standard deviation of body...