mp3 ownership- an mp3 manufacturer claims that 65% of teenagers 13 to 16 years old have their own mp3 players. a researcher wishes to test claim and selects a random sample of 80 teenagers. she finds that 57 have their own mp3 players. At a=0.05, should the claim be rejected ? use the P-value method.   PLEASE EXPLAIN STEP BY STEP

Q: A reporter claims that less than one in four Americans believe that Facebook acted inappropriately…

A: H0 : p =1/4 = 0.25 H1 : p <0.25

Q: One-Sample Test Due to grade deflation in which professor have been giving too many failing grades,…

A: 1. Consider that p is the true proportion of students passed by the particular professor.

Q: Do you prefer paintings in which the people are fully clothed? This question was asked by a…

A: a) The level of significance is 0.05. b) The test hypotheses are: Null hypothesis: H0: p1 = p2…

Q: 5. A whisky brewery firm in Scotland claims that the proportion of alcohol in their new drink is at…

A: Givenn=sample size=70p^=sample proportion=0.42

Q: Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system…

A:

Q: A political geographer is interested in the spatial voting pattern during the last presidential…

A: From the provided information, Sample size (n) = 45 Out of which 20 voted for candidate A. Level of…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 89…

A: Given that, Of a random sample of n1 = 89 politically conservative voters, r1 = 19 responded yes.…

Q: Generally speaking, would you say that most people can be trusted? A random sample of n1 = 257…

A: Consider that n1 and n2 are defined as the sample sizes for both different age groups in Chicago,…

Q: Hypertension It has been found that 26% of men 20 years and older suffer from hypertension (high…

A:

Q: 2. What should you do if the p-value is low?

A: We know that, a P-value is a statistical measurement used to validate a hypothesis against observed…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 89…

A: Given: n1=89,                       r1=20n2=83,                       r2=24

Q: Why do we use 1/4 in place of p(1 - P) in the formula below for sample size when the probability of…

A:

Q: A law enforcement agent believes that 80% of the drivers stopped on Saturday nights for speeding are…

A: The hypothesized proportion is 0.80.

Q: Close Confidants and Social Networking Sites A study1 has been conducted in which 2006 randomly…

A: Given Sample size =n1=947 Sample size =n2=1059 X1bar=2.5 X2bar=1.9 Sample standard deviation s1=1.4…

Q: What is the​ p-value?

A: Here sample size is too large so use z test for proportion

Q: A researcher is studying whether rain depresses voting. They compare the percentage of registered…

A: From the given information, the claim of the problem is comparing the percentage of registered…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 89…

A: From the provided information,

Q: Q2. A consumer survey was conducted to determine the amount of money spent on food per month in…

A: 1] The average total income =23,000 RO 2] Sample data Total Income x 30000 40000 25000 10000…

Q: Are most student government leaders extroverts? According to Myers-Briggs estimates, about 82% of…

A: Given: Population proportion, p=0.82 Sample size, n=71 Number of students found to be extroverts,…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 95…

A: It is given that:

Q: Do you prefer paintings in which the people are fully clothed? This question was asked by a…

A: From the provided information,

Q: A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper…

A: Given Information: Sample size (n) = 1100 Out of which X = 570 registered voters would vote for the…

Q: Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system…

A: The hypothesized proportion is 0.77.

Q: You take a random sample of 500 people and 125 have cats (having cats is considered a success).…

A: Given data,n=500x=125p=?

Q: Freshman tend to drop Statistics courses during the first week of the semester because the course…

A: From the provided information, Sample size (n) = 50 Out of which 21 actually dropped the courses.…

Q: Country Financial, a financial services company, uses surveys of adults age 18 and older to…

A:

Q: A historian examining British colonial records for the Gold Coast in Africa suspects that the death…

A: The proportion of African that died is p1=x1n1=24534002=0.007205459 The proportion of Europeans that…

Q: elow are two scenarios.  One exhibits sampling bias, and one exhibits wording bias.  Identify the…

A: When a bias in the sampling that essentially influences the response due to ill-formed words may be…

Q: The National Study of the Changing Workforce conducted an extensive survey of 2958 wage and salaried…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 217 women,…

A: Solution: It is given:

Q: The worldwide market share for the Chrome web browser was 56.43% in a recent month. Suppose that…

A: Given : Claim : The market share for the Chrome web browser at your university is greater than the…

Q: To survey clients at a massage-therapy spa, a researcher alphabetically lists all of the customers…

A: Systematic sampling is a sampling technique that is used when the target population is arranged in…

Q: investigate, the analyst selects a random sample of 500 households and finds that 98% of them…

A: We have to find the null and alternate hypothesis.

Q: The government reports that the literacy rate is 52%. A non-governmental organization believes it to…

A: One sample test for proportion is used to measure the number of success in independent trials with…

Q: A researcher goes to a local park to see how many people are wearing face masks. She counts 37 women…

A: The following information is provided:   Women Men Wear face mask x1=24 x2=14 Total  n1=37…

Q: Of 290 female registered voters surveyed, 125 indicated they were planning to vote for the incumbent…

A: Given: n1=290, x1=125, n2=395 and x2=146. Then,p^1=x1n1=125290=0.43103p^2=x2n2=146395=0.36962

Q: A doctor is concerned that a drug treatment causes people to run a fever. She recruited n=50…

A:

Q: In each of Exercises, use the technology of your choice to decide whether applying the t-test to…

A: For checking whether the t-test can be used or not, drawing histogram is needed.Step by step…

Q: Generally speaking, would you say that most people can be trusted? A random sample of n1 = 257…

A: a) The level of significance α = 0.01. b) Now, the sample test-statistics is- We use normal…

Q: A school principal claims that the numeracy rate of the senior high school students in his school is…

A: Given p=0.6, pcap=200/500=0.4, n=500, alpha=0.05 1. H0:p=0.60 vs H1:p!=0.60 2) alpha=0.05 3) Test…

Q: Generally speaking, would you say that most people can be trusted? A random sample of n1 = 253…

A: a) level of significance is α = 0.05.

Q: A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper…

A:

Q: A study found that 13% of Americans have seen or sensed the presence of an angel. A contingent…

A:

Q: on Administration reported that 51.7% of homes in the United States were heated by 8–44 natural…

A: The null and alternative hypotheses are: Ho: p = 0.517Ho:p=0.517 Ha: p =\not 0.517Ha:p≠​0.517 This…

Q: Statistical tests are more accurate if there is a sample size of n > 30. how will a sample size  of…

A: It is given that the sample size is n=20.

Q: PracticE the legalization of marijuana. Among the Democratic voters surveyed, 158 of the 200 people…

A: 2 proportion z test is applicable

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

A: We have to perform hypothesis test for single proportion.

Q: Spam: A researcher reported that 71.8% of all email sent in a recent month was spam. A system…

A: It is given that, The researcher claim that are spam is greater than 70%.

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.