A sociologist is studying the effect of having children within the first 2 years of marriage on the divorce rate. Using hospital birth records, she selects a simple random sample of 200 couples who had children within the first 2 years of marriage. Following up on these couples, she finds that 70 couples are divorced within 5 years. Let  p= the population proportion of couples who had children within the first 2 years of marriage and are divorced within 5 years.  Suppose the sociologist wishes to test  Ho: p= 0.4   versus Ha: p < 0.4. What is the test statistic? What is the P value?

Q: Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the…

A: The sample of teenagers time is 3.0, 4.25, 5.5, 3.5, 7.0, 6.3, 2.0, 4.5, 3.7, 3.6.

Q: What is the overall mean? What is the mean of Drug 1? What is the mean of Drug 2? What is the mean…

A: Here use sample mean formula

Q: Suppose that the unemployment rate for 18- to 34-year-olds was reported to be 10.6%. Assume that…

A: Given, The unemployment rate for 18- to 34-year-olds was reported to be 10.6% based on a random…

Q: Suppose in the trial described in Problem 8 that patients were recruited from three different…

A:

Q: An article describes several studies of the failure rate of defibrillators used in the treatment of…

A: Given : Sample Size, n = 81 Number of successes, x = 15 confidence level,c=0.95

Q: Suppose a cable network wants to determine the current percentage of customers who are under the age…

A: GivenMargin of error(E)=3%=0.03confidence level=90%

Q: How many customers should the company survey in order to be 95% confident that the estimated…

A: It is given that Level of confidence = 95% Margin of error E = 2 percentage points = 2% = 0.02

Q: Since first year students reported at the University of Nairobi, a shop attendant at students hall…

A: In the given example we wish to check whether there is association between the soda preference…

Q: An auto shop wants to examine the proportion of customers that have to retur after an appointment.…

A: Given that  Sample sizes n1=402 , n2=319 Sample proportion p1^=0.224 , p2^=0.251

Q: The claim is that the proportion of accidental deaths of the elderly attribute to residential falls…

A: From the provided information: The hypotheses can be constructed as: Null hypothesis: H0: p = 0.15…

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

A:

Q: Suppose that, for one semester, you can collect the following data on a random sample of college…

A: Given information: For one semester, the data was collected from a random sample of college juniors…

Q: If you randomly sampled a normally - distributed population and obtained ten observations with a…

A: It is given that the population distribution is normal. If the population is normal, then the sample…

Q: In US, the mean weekly earning of male works was $1005 last year. A random sample of 50 female…

A: From the given information, Sample data: { 560 360 688 1301 49 582 751 4131 3211…

Q: Suppose that in a large class, the instructor announces that the average grade on an exam is 75.…

A: According to the definition of estimation, a sample mean is equal to the population mean.

Q: Due to the economy, are Americans staying in their first professional job longer? This was a ques-…

A: Given that,

Q: The proportion of the total incidence of stroke in left hand batters that is attributable to being…

A:

Q: When comparing two independent samples with continuous outcomes, an investigator would compare the…

A: Given problem Given that   When comparing two independent samples with continuous outcomes, an…

Q: Suppose that data are collected from a random sample of 48 male students and 91 female students at a…

A:

Q: The US National Survey on Drug Use and Health reports that 4.8% of persons 12 and older regu- larly…

A: p=0.048n=900x=54p⏞=xn=0.06 d) The test statistics is…

Q: IS the aimerence belween the Imean amlual salanUS UI statisticians im Region 1 anu RegiuUIT2 11 than…

A: Let  μ1 and μ2 be the average salary of statistician from each region.

Q: On each trial of an experiment, a participant is presented with a constant soft noise, which is…

A: We have given that,  The data set is,  337, 406, 747, 406, 406, 337, 337 Then,  We will find the…

Q: Suppose an automotive repair company wants to determine the current percentage of customers who keep…

A:

Q: A population has a mean of 50, SD of 30. We have a sample with a mean of -10, sample size is 9. Does…

A: Denote μ as the population mean.

Q: 2. A sample of

A:

Q: Suppose that Max is a climate change scientist and butterfly enthusiast. In Max's locale, the mean…

A: The distribution is normal and the population standard deviation is unknown so the t distribution…

Q: An article claimed that "those with a college degree reported a higher incidence of sunburn than…

A:

Q: Participants selected 120 samples of size 3 from a population of 5 scores (0, 0, 0, 3, and 6) using…

A: Given data participants selected 120 samples of size 3 from a population of 5 scores using…

Q: Interpret the interval. We are 99% confident that the proportion of all patients who experience a…

A: Given : Sample Size, n = 356 Number of successes, x = 19 confidence level,c=0.99

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: since estimate for proportion is not known therefor we take p⏞=0.5 margin of error=E= 0.03 level of…

Q: a.     What statistical test will you use to test this data ?   b.     State the null and…

A: From provided information it is claimed that, women’s movement has resulted in an increase in the…

Q: researcher hypothesizes that the regions in the US feel differently about Hip Hop Music.  To test…

A: Applying ANOVA test for a single factor, Given, SS(between)  = 76.1335 SS(within) = 100.71 SS(Total)…

Q: all possible samples each of size 2 from the population 12, 6, 24, 30, 18 using sampling with and…

A: Given, Population size: 12, 6, 24, 30, 18

Q: 2. Metal Tags on Penguins and Survival. Data were collected over a 10-year timespan from a sample of…

A: As per the Bartelby guidelines only three sub-parts can be answered. Kindly resubmit the question…

Q: 3. A study in Men's Health magazine stated that 14% of men said they use exercise to reduce stress.…

A:

Q: Soda/Year of study Fist Year Second Year Coca cola 33 57 Fanta 30 20 Spirit 5 35 Stoney 12 8 Based…

A: Given Data :   First year Second year Total Coca Cola 33 57 90 Fanta 30 20 50 Spirit 5 35…

Q: when you have means from two different samples, it is best to conduct a what test?

A: When there is mean from two different samples, two types of test can be conduced:

Q: One sample has n=7 and SS=35 and a second sample has n =17 and SS =45. What is the pooled variance…

A: Given information: The two sample statistics is given as, Sample 1 n1=7SS1 = 35 Sample 2 n2 = 17SS2…

Q: Among 1815 randomly selected high school students surveyed by the Centers for Diseases Control, 300…

A: The sampling distribution of sample proportion is generated using the sample proportions of repeated…

Q: 3. A study examined the effect of protein consumption on weight gain in rats. Investigators obtained…

A: Given, There are 61 female rats out of that 30 of them are low protein and other 31 to a high…

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.