A marketing firm is interested in studying what types of links are most profitable on their website. They examine a sample of 50 visitors to their website and find that of those visitors 35 clicked on a particular link. a-  Construct a 98% confidence interval for the proportion of visitors that click on the link. Interpret.  b-  The marketing firm wants to estimate the proportion of visitors that click on the site within 2%. If they are to use a 98% level of confidence, how many visitors should be surveyed?

Q: You're considering going to graduate school, and you would like to know how many people would…

A:

Q: Which value is greater than at most 75% of all scores in a data set?

A: The median is middle value of the observations, above or below which 50% of the observations lie.

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given data, n=152 x=101 p=x/n =0.664 The 95% CI is Zc=1.96

Q: A random sample of 900 car owners in a particular city found 252 car owners who received a speeding…

A: Given,n=900x=252p^=xnp^=252900=0.281-p^=1-0.28=0.72α=1-0.95=0.05α2=0.025Z0.025 =1.96   (from…

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 survey was conducted that asked 1005 people how many books they had read in the past year. Results…

A: Given,sample meaan(x¯)=14.3sample standard deviation(s)=16.6sample size(n)=1005degrees of…

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 survey of a group's web habits for the past month obtained the following information. 38% visited…

A: Solution: Let A be the event that a person visited Facebook, B be the event that a person visited…

Q: Which of the common confidence levels (90%, 95%, or 99%) would you prefer to use if you wanted to…

A: Introduction: The “smallest” confidence interval implies the confidence interval with the shortest…

Q: Find 90% confidence interval for the true proportion of all medical students who plan to work in a…

A: Given : Sample Size, n = 300 Number of successes, x = 30

Q: Describe when you would use a t-score instead of a z-score when finding a confidence interval.

A: Describe in what conditions t-score would be used instead of a z-score when finding a confidence…

Q: Scenario: A mathematics placement test is given to all entering freshmen at a small college. A…

A: Correlation coefficient is denoted by r

Q: The Chicago Cubs win an average of 56.8% of all their games.  How should this data be classified?…

A: Nominal data: Nominal data measure qualitative data and it is the name of variable. example: Smoking…

Q: A study was undertaken to see how accurate food labeling for calories on food that is considered…

A: In statistical hypothesis testing, the one-way ANOVA (analysis of variance) test is a commonly used…

Q: Kris works for the MESA Air Pollution Study at UW, and studies the correlation be- tween air…

A:

Q: A survey was conducted that asked 963 people how many books they had read in the past year. Results…

A: From the provided information, Sample size (n) = 963 Mean (x̄) = 14.7 Standard deviation (s) = 17.8…

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.