Dr. Pat Jones is an industrial psychologist and is currently studying stress amount internet company executives. A questionnaire was developed to measure stress. A score above 80 indicates stress at a dangerous level. A random sample of 15 executives revealed the stress scores in the attached file. homework 3 - 2.xlsx     ( Stress  94, 78, 83, 90, 78, 99, 97, 90, 97, 90, 93, 94, 100, 75, 84 ) What is the point estimate of the population mean? (answer should be in xx.xxx format)

Q: Express the confidence interval 41.9%<p<49.9%41.9%<p<49.9% in the form of ˆp±Ep^±E.

A: The given confidence is interval is, 41.9%<p<49.9% The upper limit p^+E=49.9%The lower limit p...

Q: Do single-parent families tend to be more impoverished than familics with two parents? In to test if...

A: Given table data is as below,   col1 col2 totals row1 24 20 44 row2 11 45 56 totals 35 65 N...

Q: A set of data has a mean of 16,  a median of 15 and a mode of 14. which of these numbers must be val...

A: From the information, the mean is 16, median is 15 and mode is 14.

Q: If n = 24, ¯xx¯ = 30, and s = 3, construct a confidence interval at a 98% confidence level. Assume t...

A: Given information Sample mean (x̅) = 30 Sample standard deviation s = 3 Sample size n = 24 98% confi...

Q: Find the area, to the nearest thousandth, of the indicated region of the standard normal distributio...

A: P(z < −0.75 )=?  

Q: In a recent poll, 290 people were asked if they liked dogs, and 61% said they did. Find the Margin o...

A: Given: Sample size (n) = 290 Sample proportion p^=0.61 Confidence level = 0.90 So, α=1-0.90=0.10

Q: A B C Number of boys 6 5 3 Number of girls 10 3 1 Given that a student is not chosen in group...

A: iven Information   A B C Total Number of boys 6 5 3 14 Number of girls ...

Q: A sample of size n=10n=10 is drawn from a population. The data is shown below. 29.9 17.5 31.6 45....

A:

Q: A survey shows the probability of the number of automobiles that families in a certain housing plan ...

A:

Q: A binomial probability is given. Write the probability in words.​ Then, use a continuity correction ...

A: Given probability  is P(x=114) The probability of getting exactly equal to 114 successes

Q: Suppose that the lifetimes of light bulbs are approximately normally​ distributed, with a mean of 57...

A: From the provided information, Mean (µ) = 57 Standard deviation (σ) = 3.5 Let X be a random variable...

Q: Find the area, to the nearest thousandth, of the standard normal distribution between the given z-sc...

A: Draw the normal curve and shade the area between z=1.24 and z=1.73. The required shaded area under ...

Q: Use the traditional method. Be sure to include the null and alternative, significance level, critica...

A: Solution: The claim is to test if the herb ginkgo biloba is effective in preventing dementia. Let p1...

Q: The following data has been collected on the number of times that owner-occupied and renter-occupied...

A: Solution: Let x = number of times that owner-occupied units had a water supply stoppage lasting 6 or...

Q: Students at a school took a 35-point exam.  Below is a random sample of exam scores. 25        35   ...

A: Given data of sample scores25  35  22  19  25  31  21  27  10  22 a)Class width =6The range of data ...

Q: i asked this quest earlier but i don't believe the answer I got for C was correct can you please giv...

A: Given p=0.689 and n=600 μ=np=600*0.689=413.4σ=np(1-p)=600*0.689*(1-0.689)=11.3388

Q: Country Country Country Construct a 95% confidence interval for the population proportion of adults ...

A: The sample proportion 0.33, and sample size is 1,013. Computation of critical value: 1-α=0.95α=0.05α...

Q: Find the probability that Maggie will see at least 3 clients per day (round four decimal place). Fin...

A: Given frequency table: Total frequency is 225 Probability(x) = frequency(x) / total frequency Proba...

Q: A study suggests that the 25% of 25 year olds have gotten married. You believe that this is incorrec...

A:

Q: a cereal box filling machine is designed to release an amount of 16 ounces of break into each box an...

A: Given information- Population mean, μ = 16 ounces Sample size, n = 150 Sample mean, x-bar = 15.75 ou...

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no ...

A:

Q: In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length o...

A: Given ,Point estimate =  =9.72 Margin of error = 0.22

Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service,480 were del...

A: The given data is, x= 480, n= 500 p^=xn=480500=0.96  

Q: A facility management company is interested in determining the average temperature during July of on...

A: From the provided information, Sample size (n) = 49 The sample mean and standard deviation can be ca...

Q: A cable company prepared four versions of a set of instructions for hooking up a TV. The company ask...

A:

Q: How many different kinds of paint does a companymake if it classifies its paints as follows:• Color:...

A: Given number of colors=6 Number of types=2 Types of texture=3 uses=2 Different kinds of paint=?  

Q: A programmer plans to develop a new software system. In planning for the operating system that he wi...

A: From the provided information, Margin of error (E) = 0.05 Confidence level = 90% Assuming the sample...

Q: For a fixed sample size, what happens to the probability of a Type II error if the significance leve...

A: It increases because decreasing the significance level is equivalent to shrink the rejection region ...

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard...

A: It is given that the mean is 0 and standard deviation is 1.

Q: Express the confidence interval 41.9%<p<49.9%41.9%<p<49.9% in the form of ˆp±Ep^±E.

A: The sample proportion is, p^=0.419+0.4992=0.459 The margin of error is, ME=0.499-0.4192=0.04  

Q: What is the SRS size ?

A: From the provided information, Population standard deviation (σ) = 6.6 Margin of error (E) = 0.9 Con...

Q: There is some evidence suggesting that you are likely to improve your test score if you rethink and ...

A:

Q: The population mean’s annual salary for registered nurses is $59,100. A random sample of 35 register...

A: Given: μ=$59,100σ=$1700n=35

Q: Country of Origin N Mean Std. Deviation China 50 22.5 9.75 America 30 33.15 11.6 What is the ...

A:

Q: It is known the population IQ score follows a normal distribution with mean as 100, SD as 10. A rese...

A: The sample size is 25, sample mean is 110, population mean is 100, and population standard deviation...

Q: Students in a university's physics lab courses are expected to report types and explanations for err...

A: a) Here, the test is about difference between two proportions.

Q: In 2016, the US poverty rate was 12.7%. During that year, 305 families where randomly selected in Ha...

A:

Q: For each of the following probabilities: (show all work) • convert the raw score to a standard score...

A: Changing into standard normal variate. Sketch the normal curve and shade the area between z=-3 and...

Q: 60% of students entering four-year colleges receive a degree within six years. Is this percent large...

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want solution...

Q: According to Money magazine, Maryland had the highest median annual household income of any state in...

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want solution...

Q: A researcher wishes to estimate, with 99% confidence, the population proportion of adults who eat fa...

A:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no ...

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL...

Q: 5. A marketing research firm surveyed 49 randomly selected residents in North Texas to determine the...

A:

Q: Let’s assume that the “prevalence” (i.e., the proportion of infected people) of COVID-19 in a partic...

A: The prevalence rate is 5%, that is the probability that the person has COVID-19 is 0.05. Also, the t...

Q: It seems these days that college graduates who are employed full-time work more than 40 -hour week...

A: Given information- Population mean, μ = 40 Sample size, n = 19 Sample mean, x-bar = 44 Sample standa...

Q: ?

A: Policy: Since you have asked multiple questions, we will solve the first question for you. If you wa...

Q: all questions except d,e,f.

A: Given information Defect rate p = 0.015  

Q: The number of hours worked per week for a sample of ten students is shown below. STUDENT         HOU...

A: Given observation 20, 0, 18,16,22,40,8,6,30and 40 Median is given by Arrange the data in the increas...

Q: Any help would be greatly appreciated!

A: 10. a) In this study, the statistician is interested to determine whether the number of goals scored...

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.