In 2001, the Gallup poll found that 81% of American adults believed that there was a conspiracy in the death of President Kennedy. In 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the assassination, and found that 634 believe there was a conspiracy ("Gallup news service," 2013). Do the data show that the proportion of Americans who believe in this conspiracy has decreased? Test at the 1% level.

Q: An on-line retailing firm conducts a study into the number of on-line purchases of footwear made…

A: Defines that p is true proportion of the number of on-line purchases of footwear made during all of…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: The hypothesized mean is 140.

Q: A survey of 2255 randomly selected US adults found that 51% said they know all or most of their…

A:

Q: Present a contingency table and analyze using the proper statistics. Discuss your findings.

A: The two categorical variables given are promotion and retired status,Given that,No. of employees…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A:

Q: The results of a nationwide Gallup poll revealed that 59.3% of people polled were in favor of the…

A: See the handwritten solution

Q: The health center head got the report that the median age of under-five children who visited the…

A: Given Information: The median age of under-five children who visited the under-five OPD is 34…

Q: Approximately 1.55 percent of people ages 40-50 have breast cancer.* Suppose a person has a 86…

A: Probability is a chance of occurrence of any event.

Q: yberbullying In 2018, the Pew Research Center did a study on cyberbullying. A sample of 743 teens…

A: Givensample size(n)=743No.of teend were considered a target of…

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

A: Solution: Given information: n = 210 Sample size  p= 0.11 Population proportion

Q: In a survey conducted by the Gallup organization on September 6-9, 2012, 1,017 adults were asked "In…

A: From the given data ( 1 ) Frequency table Confidence LevelFrequencyGreat deal81Fair amount325Not…

Q: A company executive claims that employees in his industry get 100 junk emails per day. To further…

A: Given Information: Consider the given dataset: 125, 101, 109, 94, 122, 92, 119, 90, 118, 122. The…

Q: An economist believes that the median income of lawyers who recently graduated from law school is…

A: Given that, An economist believes that the median income of lawyers who recently graduated from law…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: From the given information, the hypothesized mean is 148.

Q: World Wide Web has a subsection designed to assess the "honesty" of the test-taker. You are…

A: Population mean=1148Sample mean=144Standard deviation =25 We have to finda...Null and Alternative…

Q: What are the null hypothesis ( H0 ) and the alternative hypothesis ( H1 ) that should be used for…

A: a) null Hypothesis H0 - μ =145     Alternate Hypothesis H1 - μ <> 145 (μ not equal to 145) b)…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: We have given that Mean(µ) = 140 Sample mean (x̅) = 134 Standard deviations (s) = 28

Q: According to Forbes, there are currently 2,153 billionaires in the US. A professor studying wealth…

A: The mean difference between the two sample tested whether there is any significance difference…

Q: Suppose a professor wants to know if students in her statistics class have a good grasp of basic…

A: Given: Sample size n=6 Sample mean x¯=∑i=1nXin=62+92+75+68+83+956=79.167 Sample standard deviation…

Q: Cyberbullying In 2018, the Pew Research Center did a study on cyberbullying. A sample of 743 teens…

A: Given: Sample size, n = 743 (a) Proportion = 446743=0.60026 First of all check the conditions of…

Q: The 1958 Detroit Area Study was an important investigation of the influence of religion on everyday…

A: Given Favourable cases (X1)=118 Sample size (N1)=276 Favourable cases (X2)=88 Sample size (N2)=224

Q: (a) What are the null hypothesis H. and the alternative hypothesis H, that should be used for μ the…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: Assume that 1500 births are randomly selected and 760 of the births are girls. Use subjective…

A: Given Information: 1500 births are randomly selected and 760 of the births are girls. Use…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: Given data Hypothesized mean = 142 Population Standard deviation = 25 Sample size n = 100…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: A)Verifying the conditions:It is given that, the proportion of the American population who use only…

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: Given that  Suppose the true mean score among the general population on the subsection is 14. Fill…

Q: Manatees are large aquatic mammals found primarily in the rivers and estuaries of Florida. Because…

A: Population is the complete set of people or objects with certain common characteristics under the…

Q: The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls, Iowa…

A: Given : The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls,…

Q: According to the FBI and the Justice Department, 70% of all arrests are of males aged 15 to 34…

A: The level of significance is 0.01 (=1%).

Q: Students in a statistics class at Penn State were asked, “About how many minutes do you typically…

A: 1) The assumptions necessary for performing the two-sample t-test, such that the results obtained…

Q: A company executive claims that employees in his industry get 100 junk emails per day. To further…

A: Test is that whether true mean number of junk emails received this day by employees of this company…

Q: Test whether a majority of Kansas residents planned to set off fireworks on July 4th. In other…

A: Testing of population proportion is used here which is a binomial test that compare a proportion of…

Q: There were 5 women and 6 men who were interviewed for five positions. Their qualifications,…

A: Given that, there are 5 women and 6 men. There are total 5+6= 11 candidates. Total number of…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: Solution:Part(D):Finding the test statistic value for the hypothesis test for…

Q: The following data lists the ages of a random selection of actresses when they won an award in the…

A: The data shows the ages of a random selection of actresses when they won an award in the category of…

Q: t has been reported that 5% of U.S. households don’t own a smart phone, 35% own one smart phone, 40%…

A: The distribution of the smartphones in 100 sampled households is given as:No. of smartphonesNo. of…

Q: A research scientist wishes to test the claim that the mean number of children per classroom in…

A: Suppose xi, (i=1,2,...,n) be the random sample of size n taken from the normal population with mean…

Q: A survey was conducted to determine whether adult participation in physical fitness programs varies…

A: State the hypotheses. Null hypothesis: Alternative hypothesis: Correct option: Option 1.

Q: Please give me correct solution with explanation.

A: The objective of the question is to identify which attribute is not a strength of the study's…

Q: In a study of 203 young male/female couples, each partner privately was asked whether they had ever…

A: Probability of an event is computed by taking the ratio of number of favourable outcomes to total…

Q: Cyberbullying In 2018, the Pew Research Center did a study on cyberbullying. A sample of 743 teens…

A: We have given that,  Favorable cases (X) = 438 and sample size     (N) = 743 Then,  We will find the…

Q: In a survey conducted by the Gallup organization September 6-9, 2012, 1,017 adults were were asked…

A:

Q: Suppose that a poll taken 10 years ago found that 69% of parents spank their children. Suppose a…

A: Answer Sample size [n] =200p =69%   =69/100    =0.69

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.