One study, based on responses from 1,020 randomly selected teenagers, concluded that 41% of teenagers cite grades as their greatest source of pressure. Us significance level to test the claim that fewer than half of all teenagers in the population feel that grades are their greatest source of pressure. Formulate the null and alternative hypotheses. Choose the correct answer below. O A. Ho: p<0.5 H3 p= 0.5 O B. Ho p= 0.5 H3 p>0.5 O C. Ho: p= 0.5 Ha p#0.5 O D. H, p= 0.5 H, p<0.5

Q: his problem is fill in the blank.  Just choose the correct answers.  Thank you for your help…

A: 1) The claim is that μ is less than 36 minute. Null hypothesis H0: μ ≥ 36 minute Alternative H1:…

Q: erform a 1-sample test for the median being 13 with the following data at the α = 0.05 threshold and…

A: The objective is to test whether the sample median is equal to the hypothesized median 13.

Q: A simple random sample of men aged 60 to 70 (Group 1) and a simple random sample of men aged 35 to…

A: Null vs Alternative hyptheses:P-value = 0.04

Q: Research should use a significance level of alpha = 0.20 instead of alpha = 0.05 because it is…

A: Statistical Significance: Statistical significance is a statistical method for testing whether data…

Q: value, Test Statistic and Hypotheses

A: From the available information, the population is normal with unknown population standard deviation.…

Q: Report of seatbelt usage showed 27.5% versus 21.3% with z =1.36 what is the correct one sided p…

A: From the provided information, The value of test statistic (z) = 1.36

Q: Compute the first and third quartile?

A: Here, we have to find the first quartiles and third quartiles.First quartile is that value below…

Q: The work week for adults in the US that work full time is normally distributed with a mean of 47…

A: Given data is48,42,55,51,48,65,54,54,45,49,53,50sample size(n)=12significance level(α)=0.10

Q: A political analyst believes that a senator's recent decision to support a bill resulted in a drop…

A: The given data is as follows: Approval Rating Before (Percent)Approval Rating After…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: 48 142 118 131 133 O 83 170 172 152 134 is the mean value of the differences d for the population of…

A: The objective is to test whether there is a difference between the measurements from the two arms.…

Q: Find the standardized test statistic t for a sample with n= 20, x = 13, s= 2.0, and a=0.05 if H: u <…

A: As per guideline expert have to answer first question only.

Q: The average American gets a haircut every 36 days. Is the average larger for college students? The…

A: Given data is 32,36,45,48,33,42,36,32,33,47,47,46,32,37sample size(n)=14α=0.01

Q: The mean voltage and standard deviation of 16 batteries from each manufacturer were measured. The…

A: Given :  For Sample 1 x̄1 = 157.0 σ1 = 5.0 n1 = 16 For Sample 2 x̄2 =…

Q: Use the empirical rule to solve the problem. 8) At one college, GPA's are normally distributed with…

A:

Q: Traffic department wants to know if automobile accident is a very serious problem in Central…

A: Null hypothesis:µ=3.Alternative hypothesis:µ≠3This is a two tailed test.Since the population…

Q: Nicotine Absent Nicotine PresentSelf-Reported Non Smoker 82…

A: First let's put the given data in a contingency table as shown ;

Q: A statistical test of hypothesis produces the P-value P = 0.112.  Will the null hypothesis be…

A: Decision rule : Reject H0 if P-value  &lt;  α

Q: A home improvement company is interested in improving customer satisfaction rate from the 80%…

A: Given data number of success , x= 138.0 sample size, n = 164 population…

Q: The shoplifting sensor at a certain Best Buy exit gives an alarm 0.12 time a minute. (0) Find the…

A:

Q: A data set includes data from student evaluations of courses. The summary statistics are n= 91, x =…

A: Given that,population mean(u)=4.25sample mean, x =4.11standard deviation, s =0.52number (n)=91

Q: A clinical researcher performs a clinical trial on 8 patients to determine whether a drug treatment…

A: Given : Claim: The drug treatment has an effect on serum glucose.

Q: What is the p value associated with this test statistic

A: Let μ denote the proportion of people in the population of USA adults, who believe that, raising the…

Q: Data previously obtained, lists full IQ scores from a random sample of subjects with low lead levels…

A: Claim: The mean IQ score of people with low blood lead levels is higher than the mean IQ score of…

Q: Ques45)The first and third quartile of a normal distribution respectively. Then distribution is the…

A:

Q: A gaming company claimed that their role-playing games take over 65 hours to complete. A sample of…

A: From the provided information, Sample size (n) = 300 Sample mean (x̅) = 63 Sample standard deviation…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 18 inches. A quality control…

A:

Q: You are a research assistant at a zoo.  The question of your study is "Has the proportion of baby…

A: Given: The Z - score is equal to 0.788 α = 0.05   The objective is to validate the asserted claim…

Q: What are the variables, what scale of measurement is each variable (nominal,ordinal,or continuous).…

A: The high school teacher was interested in whether there is a gender difference in terms of the…

Q: Professors collected data consisting of eye color and gender of statistics students. Among 888 male…

A: From the provided information,

Q: 4). Describe how a test can be reliable and not valid? Provide examples.

A: Given:-               The reliability of the test includes yielding results which are consisted that…