A research group wants to estimate the proprtion, p, of americans who can speak a language other than English. By referencing past data, the group belive that more than 45% of Americans can do so. a. state the null and alternative hypotheses for testing the group's belief/ b. If the value of the test statistic is approximately 1.46, what is the conslusion (reject H0 of fail to reject H0) of the hypotesis test? with a-0.05 c. If the true balue of is 48%, did the researchers make an error? if so what type?

Q: #4 In a Roper poll of 3000 workers, 1680 said "they feel guilty that they don't spend more time with…

A: Ans#-  Given the level of confidence interval   99 %                                        Then   α…

Q: Use the sign test to test the indicated claim. A researcher wishes to test whether a particular diet…

A: Given Information: Sample size (n) = 24 After one month on diet, for 18 people the second blood…

Q: Moderna’s COVID-19 vaccine was tested in 30,000 people. Half received the vaccine, and half received…

A: Note: As per the guidelines , only first three sub-parts have been solved. Given: Sample size of…

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

Q: In 2008, the General Social Survey asked 1,335 people how many hours a day did they watch…

A: Given 95% Confidence interval Mean=2.5

Q: In a random sample of 1003 US adults, 32% said that national identity is strongly tied to birth…

A: It is given that, 32% of the 1003 adults said that national identity is strongly tied to birth…

Q: Write a sentence demonstrating how the results from the hypothesis test and the confidence interval…

A: From the results, the 90% confidence interval to estimate the mean exam score is (68.6670, 75.7331).

Q: c.) What is the test statistic? (round to two decimal places) d.) What is the p-value? (round to…

A: Given that  Sample size n =254 Favorable cases x =117 Sample proportion p^=x/n  =117/254 =0.4606

Q: 13 The dala In a study, 137 children of a certain race in a certain city were randomly assigned to…

A: Step 1: Calculate PercentagesWe need to calculate the proportion of children who graduated from high…

Q: Over half of all American teens (ages 12 to 17 years) have an online profile on at least one social…

A: Given data is appropriate for testing of hypothesis for single proportion . Because it is a large…

Q: b. In the year 2000, a survey of 977 U.S. adults were asked who they felt was the greatest…

A:

Q: At a large university in Conway, South Carolina, the Dean wants to know what proportion of students…

A: We have given thatn = 200x = 145Confidence level (c) = 99% = 0.99Significance level (α) = 1 - c =  1…

Q: Say you've conducted a survey to determine how many people are left handed. You survey 100 people…

A: Here want to construct confidence interval for people who are left handed.

Q: The ?2 value for a one-tailed (upper tail) hypothesis test at 95% confidence and a sample size of 20…

A: Here, n=20. The degrees of freedom is, df=n-1    =20-1    =19

Q: An online poll asked: "Do you believe the Loch Ness monster exists?" Among 21,816 responses, 63%…

A: Solution-: Given: We find, (a) Identify the test statistic (b) Identify p-value (c) Identify the…

Q: A researcher wondered if the currently believed global male-births proportion value approximately…

A: Given Information: Population proportion (po) = 0.512  Sample size = 1000 Sample proportion =…

Q: The individual object in the study was a randomly selected . This is computer-graded so use exact…

A:

Q: a newspaper article stated that the us supreme court received 812 letters from around the country on…

A: To find the 95% confidence interval for the true proportion of all American adults who feel that…

Q: A survey of 1,502 Americans in January 2012 found that 86% consider the economy a "top priority" for…

A: Given n = 1502 p = 86% = 0.86 SE = 0.01

Q: Researchers claimed that women exercise at the same proportion as men do. To test this claim, a…

A: For the given data Perform Z test for two proportions

Q: In a survey of 2480 golfers, 15% said they were left-handed. The survey's margin of error was 3%.…

A: Sample size(n)=2480sampl proportion(p^)=0.15Margin of error(E)=0.03

Q: According to a report published by the Pew Research Center in February 2010, 61% of Millennials…

A: Given : Proportion of Millennials (people born between 1981 and 1996) think that their generation…

Q: What is the relationship between α and the confidence level of a hypothesis test?

A: In hypothesis testing, α is the level of significance, which provides details about the chance of…

Q: According to a recent study only 34% of adults in the United States could name all three branches of…

A: Given data, p=34%=0.34 n=1750 z-value at 95% confidence is Zc=1.96

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: In 2015 as part of the General Social Survey, 1131 randomly selected American adults responded to…

A:

Q: survey conducted by Gallup in 2020 asked 1,102 randomly selected U.S. adults, "What do you think is…

A: We have given that  Sample size n=1102 90% confidence interval.  = (0.6773, 0.7227)

Q: You are trying to estimate the percent of people in California who have a college degree. You…

A: Given that  Sample size n =60 Favorable cases x =18 Sample proportion p^=x/n  =18/60 =0.3

Q: A marketing survey involves product recognition in New York and California. Of 679 New Yorkers…

A: given data  n1 = 679    x1 = 256p^1 = x1n1 = 256679 = 0.3370 n2 = 631    x2 = 208 p^2 = x2n2 =…

Q: Assuming the null is true, what is the mean of the population? Assuming the null is true, how far,…

A: It is generally accepted that the 40% of the consumer use Apple products, hence mean population…

Q: 4) Out of the 440 people surveyed, a 110 said they listen to Spotify at least one a month. With the…

A:

Q: A national survey of 2500adult citizens of a nation found that 25​% dreaded​ Valentine's Day. The…

A: Given that sample size is n=2500. Let p denote the true population proportion of adults those…

Q: Students at a certain college were asked if they have a car. After surveying 1692 students, it was…

A: Given : n = 1692 p^=24.8%=0.248Margin of error : E =2.1%=0.021Confidence level =95%=0.95The formula…

Q: 2.) A survey of 200 college students revealed that 160 of them eat dessert daily. Construct a 95%…

A:

Q: Newseek performed a poll in which 567 american patents were asked the question "would you prefer to…

A:

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.