Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 557   randomly selected adults showed that 59 ​% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is 2.68 .

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: GIVEN DATA,  n=971x=554P^=Xn=554971=0.5705CI=0.99α=1-0.99=0.01we have to find out the confidence…

Q: Which symbol is used to represent the sample mean? O M

A: We have to identify symbol used to represent sample mean.

Q: The median has a sampling distribution. Explain why or why not?

A:

Q: O subjects in a study were randomly assigned into two equally sized groups. One group was shown a…

A: Given data is:

Q: According to a Gallup poll taken on September 10th, 1998, 31% of a sample of adults thought that…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: Find the first quartile for the scores on the Mathematics portion of the SAT.

A: Given that. X~N( μ=528, ?=117) μ=528 , ?=117

Q: Use critical thinking to list at least three things wrong with this survey. Explain fully using…

A: Given information: The results of online survey are given.

Q: Belief in Haunted Places A random sample of 280 college students were asked if they believed that…

A: Answer below

Q: A software company is interested in improving customer satisfaction rate from the 60% currently…

A:

Q: A thousand people were sampled and classified according to their smoking and alcohol consumption…

A: It is observed that the variables smoking and alcohol consumption status are categorical.

Q: additionally how would you find the: test statistic & p-value

A: The claim is that mean lead concentration is less than 19 μg/g Null hypothesis: H0 : µ=9 μg/g…

Q: A community is considering raising funds to pay for improvements to the community swimming pool. To…

A: Convenience sampling: A convenience sample is a type of non-probability sampling method where the…

Q: On a hockey team, there are 14 players. The captain of the team scored on the team, and less than…

A: Given : There are 14 players Captain of the team scored 35 goals last year, which is more than 10…

Q: The percentile 87 (Pg7) such that Pg7=78, means that: Select one: a. 13% of values are greater than…

A: A discrete variable is a variable whose value can be obtained by counting. A discrete variable is a…

Q: AP Stats The College Board reported that 58.7% of allstudents who took the 2010 AP Statistics exam…

A: The hypotheses are given below: Null hypothesis: H0: p=0.587. Alternative hypothesis: H1:p>0.587.…

Q: How to determine if a sample is small or large? In my homework, the sample size is 66. The answer in…

A: Note: Hey there! Thank you for posting the question! Sometimes a sample cannot be determined as a…

Q: ​Claim: Fewer than 92​% of adults have a cell phone. In a reputable poll of 1172 adults, 86​% said…

A: The hypotheses for the test are given below. Null hypothesis: H0: p = 0.92 Alternative hypothesis:…

Q: During the 2019 Baseball season, the Pittsburgh Pirates the 25 players had an average (mean) salary…

A: Here in the given problem  25 players had an average (mean) salary of $2.7 million. When a new…

Q: During the 2019 Baseball season, the Pittsburgh Pirates the 25 players had an average (mean) salary…

A: $ 0.1

Q: ​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1073 ​adults, 90​%…

A: Formula for Test statistic  Test statistic ( z ) z = ( p^ - p ) / ( √( p * ( 1 - p) / n) )

Q: What is the percentile rank of a bag that contains 1025 chocolate​ chips?

A: The mean is 1252 and the standard deviation is 129.

Q: Interpret the interval. Choose the correct answer below.

A: here use basic of confidence interval

Q: 29 randomly selected students were asked the number of movies they watched the previous week. The…

A: Frequency distribution is a table that display the observations and the frequencies of each of the…

Q: What is Sample?

A:

Q: A student scored 75% in a quiz worth 75 points, 85% in a quiz worth 50 points, and 80% in a quiz…

A:

Q: During the 2019 Baseball season, the 25 Pittsburgh Pirates players had an average (mean) salary of…

A: Assume the total sum of money for first 25 members be x and the salary received by an additional…

Q: Q10. The length of parts produced by which lathe machine satisfies the normality assumption based on…

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

Q: What is the 90th percentile of the following set of numbers: 4, 8, 9, 11, 13, 17, 20?

A: Introduction Percentiles are a statistical measure that divide a set of data into 100 equal parts,…

Q: Consider the sample 13, 19, 18, 20, 16, 9, 10, 7, and 8. Find the mean? Show the solution and write…

A: Given that  The data are X : 13, 19, 18, 20, 16, 9, 10, 7, 8.

Q: In June, an investor purchased 3000 shares of Oracle (an information technology company) stock at…

A: Let, X be the share price of Oracle. X1=$53X2=$42X3=$45 Let, w be the number of shares.…

Q: Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1096 adults, 85said that…

A:

Q: Students in a math class took a 10 point quiz. The scores were: 3, 6, 6, 7, 7, 8, 8, 8, 8, 8, 8, 9,…

A: Mean Let "X" be the math scores. 3 6 6 7 7 8 8 8 8 8 8 9 9 9 10 10 10

Q: An electronics company wants to gauge public opinion on its products. They send out a business reply…

A: An electronic company wants to gauge public opinion on its product. The company wants the public…

Q: If you know the p-value for a one-sided test is 0.0080, using the same statistics you used for the…

A: Answer:- Given, The p-value for a one-sided test is 0.0080. We know that "The two-tail p-value is…

Q: Suppose you plan to conduct among 2,500 Grade 12 students enrolled in the stem Track. How many…

A:

Q: laim: Fewer than 96​% of adults have a cell phone. In a reputable poll of 1017 ​adults, 86​%…

A:

Q: What do you think is the best number of respondents when conducting a research? Explain your answer.

A: The best number of respondents when conducting research: The number of respondents we need depends…

Q: ​Claim: Fewer than 91​% of adults have a cell phone. In a reputable poll of 1119 adults, 83​% said…

A:

Q: An online shop owner believes that 85% of her customers will want to go into a real store. She…

A: It is given that the an online shop owner believes that 85% of her customers will want to go into a…

Q: Twenty years ago, 47% of parents of children in high school felt it was a serious problem that high…

A: Given that: n = 900 X = 293 P = 47%  By using proportion test to solve this problem

Q: Is the sample mean, calculated from a random sample, an unbiased estimator of the population mean?…

A:

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.