In a poll conducted by the General Social Survey, 81% of respondents said that their jobs were sometimes or always stressful. Suppose a sample of 500 adults is takes and the proportion that say their jobs were sometimes or always stressful is recorded. Assuming np(1-p) > 10, what is the standard deviation of the sampling distribution of the sample proportion for this problem?

Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

A: It is given that the mean and standard deviation are 4.4 and 8.24.

Q: The Wechsler IQ test is designed so that the mean is 100 and the standard deviation is 15 for the…

A: It is given that confidence level is 0.99, standard deviation is 15 and margin of error E is 4.

Q: The Pew Internet and American Life Project surveyed 2227 adults in 2011, asking them about their…

A: It is given that the mean number of text messages sent per day is 40.9 for men, 42.0 for women. The…

Q: A professor believes that, for the introductory art history classes at his university, the mean test…

A: The objective of this question is to test the professor's claim that the mean test score of students…

Q: uppose that the resting h stributed with mean 80 a /hat heart rate would a m

A: Let X be a random variable with mean 80 and s.d. 15 that follows a normal distribution. So,…

Q: Suppose that the scores of architects on a particular creativity test are normally distributed with…

A: Solution-: Given: μ=293,σ=20 Let, X= The scores of architects on a particular creativity test ∴X→…

Q: If the standard error (σX) of the mean distribution is 10 and the sample size is 25, then what is…

A: Given information Standard error of the mean distribution = 10 Sample size = 25

Q: If the P-value is 0.003 and the level of significance , , is 0.05 in a hypothesis test for a mean,…

A: Given,p-value =0.003and  level of significance(α)=0.05

Q: According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015…

A:

Q: According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015…

A: Given Data Population Mean,μ = 76.3 Population Standard Deviation,σ = 15.0 sample…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: uppose you are studying the weights of house cats. You find their weights are normally distributed…

A: Normal distribution

Q: university in England and each student in a random sample of 38 female students from the same…

A: The following information has been provided: For Males : Sample Mean 1 (Xˉ1)(\bar X_1)= 282282…

Q: Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One…

A: Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries…

Q: A parenting magazine reports that the average amount of wireless data used by teenagers each month…

A: State the null and alternative hypotheses for the test. Fill in the blank below. H0: μ=6:…

Q: For each day of last year, the number of vehicles passing through a certain intersection was…

A:

Q: What proportion of the students scored lower than 80 if the distribution of these grades can be…

A:

Q: Researchers want to compare the relative effectiveness of two popular diets. They randomly assign…

A:

Q: For 100 randomly selected adults, compute the mean and standard deviation?

A: A recent poll found that 47% of adults believe that the overall state of moral values is poor.Here…

Q: Suppose a psychologist specializing in learning disorders wanted to estimate the mean IQ score for…

A: Note:  Since, we only answer up to 3 sub-parts, we'll answer the first 3. Please resubmit the…

Q: Suppose you know that the distribution of sample proportions of nonresidents in samples of 200…

A: Let p^ denotes the sample proportion which follows normal distribution with mean 0.46 and standard…

Q: Suppose your manager indicates that for a normally distributed data set you are analyzing, your…

A: Answer  Given data is, your company wants data points between z=−0.9 and z=0.9 standard deviations…

Q: Suppose that you want to decide which of the two equally priced brands of light bulbs last longer.…

A: Given: n1 = 100 X1 = 1175 Hours S1 = 105 Hours n2 = 100 X2 = 1220 Hours S2 = 80 Hours Significance…

Q: Give two situations in which comparing two population standard deviations would be important

A: Two situations in which comparing two population standard deviations would be important is obtained…

Q: Researchers want to compare the relative effectiveness of two popular diets. They randomly assign…

A: we have given that   There are 200 volunteers in each group.   the Group A had lost on average 7.8…

Q: A researcher predicts that showing a certain film will change people’s attitudes toward alcohol. The…

A: The mean score of the experiment for 36 people is 70. In general the mean score of the people on the…

Q: Suppose a researcher wants to know if the average diastolic blood pressure in Irish-Americans is…

A: Solution

Q: ominic would want to estimate the mean of a population which is normally distributed. The standard…

A:

Q: Suppose you are conducting a hypothesis test to determine whether the mean of a normal population is…

A: Given The data is as follows: Sample size, n=100 Sample mean, x¯=29 Sample standard deviation, s=5…

Q: Suppose a claim is made that the mean age of members of a golf club is 52 years. The population…

A: Given: n = 50 X = 56 years σ = 6 μ = 52 Formula Used: Test-statistic Z = X-μσn

Q: Should be consider this score unusual? What is the value of the test statistic?

A:

Q: What is the equation for The standard deviation of the distribution of sample proportions

A: Let p be the population proportion of successes.

Q: The Wechsler Adult Intelligence Scale (WAIS) is the most common “IQ test.” The scale of scores is…

A: Given : Let X be a r.v  with Mean (μ) = 100 Standard deviation (σ) = 15

Q: IQ scores are measured with a test designed so that the mean is 96 and the standard deviation is 18.…

A: The mean μ is 96  S.D  σ is 18

Q: A professor believes that, for the introductory art history classes at his university, the mean test…

A: The objective of this question is to test the professor's claim that the mean test score of students…

Q: uppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is…

A: Given data,n=30Population mean μ=70sample mean is x=73sd is s=3test statistic t=?

Q: A researcher wanted to know whether losing one night sleep can affect problem solving. A sample of n…

A:

Q: Suppose that you randomly survey death records for people born in 1900 in Louisiana and compared the…

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.