A researcher was interested in comparing weekly salaries between men and women. Independent samples were drawn to find the average salary for each group. A 90% confidence interval for the difference between female and male employees was determined to be (-$110, $10) in a given week. Interpret the confidence interval Zero is contained in the interval so the probability that male employees earn the same as females is 0.9. 90% of the time, women earn less than men. ek Based on these data, we would assume that female employees average between $110 and $10 more per than male employees We are 90% confident that men earn between $110 less or $10 more than women in a given week.

Q: A survey of 800 women shoppers found that 17% of them shop on impulse what is the 98% confidence…

A: Sol:- To calculate the 98% confidence interval for the proportion of women shoppers who shop on…

Q: A doctor would like to estimate the mean difference in height of pairs of identical twins. The…

A: The correct inference regarding the given interval of (-0.823, 0.573) is to be made from the given…

Q: A random sample of 300 college freshmen found that 112 of them own an iPhone.  Find a 95% confidence…

A: Given, Favorable Cases XX = 112112 Sample Size NN = 300300

Q: Out of a sample of 600 adults aged 18 to 30, 162 still lived with their parents. Based on this,…

A:

Q: The 95% confidence interval for the difference in the proportions of people who make donations if…

A: Given : n1 = 200 x1 = 56 n2 = 200 x2 = 36 confidence level,c=0.95

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

Q: A scientist wondered if there was a difference in the average daily intake of dairy products between…

A: Reviewing information, X : Daily intake of dairy products of MenY : Daily intake of dairy products…

Q: A random survey of 70 male sophomores showed 16 preferred off campus living and out of 63 female…

A:

Q: A sample of 200 found that 43.2% of those sampled consumed more than 2 alcoholic  beverages  a week.…

A: Given:

Q: A recent survey showed that among 850 randomly selected subjects who completed 4 years of college,…

A: I'm providing the solution below please do refer it and let me know if you have any queries…

Q: I want to estimate the average time it takes a tomato plant to bear fruit. I randomly sample 16…

A: Given,sample size(n)=16mean(x¯)=36standard deviation(σ)=17α=1-0.85=0.15α2=0.075Z0.075=1.4395…

Q: sample of 97 psychology graduates found an average salary of $71 K/year. Assume ?=$14 K/year. Find…

A: Given Z score 90% confidence interval=1.645 Sigma=14 n=97

Q: A group of 8 students were given the same standardized test twice to see whether retaking the test…

A: It is given that .

Q: In a survey, 45 people were asked how much they spent on their last partners birthday gift. The…

A: Given information- Sample size, n = 45 Significance level, α = 0.10 Sample mean, x-bar = $90 Sample…

Q: According to a report on consumer fraud and identity theft, Indiana had 1671 complaints of identity…

A:

Q: A study at Harvard found that 44% of their students binge drink. You are at Princeton doing a…

A:

Q: A survey of 100 customers showed that 36 of them preferred brand B of a particular product. Give a…

A: p = proportion of people vote for BSample size : n = 100Number of favorable outcomes : x =…

Q: In a random sample of 500 Americans, 25% indicated that they have a cat for a pet. Estimate with 97%…

A:

Q: How much more sensitive to contrast are athletes with eye grease than without eye grease? Give a 95%…

A:

Q: A market researched for a consumer electronics company wants to study the television viewing habits…

A: Given: n=40x¯=15.3S=3.8 Degrees of freedom: df=n-1=40-1=39 The critical-value is obtained by using…

Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

Q: A random sample of 100 employees at a company shows that 62 are female.  Form a 95% confidence…

A:

Q: In a survey of 1072 adults, a poll asked, "Are you worried or not worried about having enough money…

A:

Q: The First National Bank of Wilson has 620 checking account customers. A recent sample of 70 of these…

A: Given that,N = 620n = 70x = 37Confidence interval(c) = 0.95The formula of the margin of error…

Q: A sample of 400 homeowners includes 124 that expect their home to increase in value in the next…

A: Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

Q: A scientist claims that 65% of U.S. adults believe humans contribute to an increase in global…

A: Given  A scientist claims that 65% of U.S. adults believe humans contribute to an increase in global…

Q: A random sample of 100 employees at a company shows that 42 drive US made automobiles (the rest…

A: A random sample of 100 employees at a company shows that 42 drives US made automobiles  p = Sample…

Q: A marketing research company is estimating which of two soft drinks college students prefer. A…

A:

Q: You receive a brochure from a large university. The brochure indicates that the mean class size for​…

A: Sample size is, Population mean is Confidence Level is The objective is to test the claim that the…

Q: Construct the 99.8% confidence interval for the difference P1 - P2 when x, = 23, n, = 53, x2 = 15,…

A:

Q: 90% confidence interval for the mean of airline reservations being canceled on the day of the flight…

A: Given 90% confidence interval is (2.68,9.42)   Lower limit=2.68 Upper limit=9.42 Point estimate p=?

Q: A student found that in a random sample of 300 people in a town, 105 play sports. Based on this…

A: Given that, X = 105 N = 300 90% confidence level

Q: Does this interval give the quality control inspector reason to believe that the mean amount of…

A: The 95% confidence interval for the true mean amount of juice dispensed per bottle is (296.4,…

Q: A random sample of prices of petrol per litre (in p per litre) from UK filling stations was taken…

A: Given : 1 litre =0.22 gallons 95% CI for mean price of petrol per litre is (131.42 , 142.22)

Q: Of 102 randomly selected adults, 42 were found to have high blood pressure. A 90% confidence…

A:

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: Given,Sample size(n)=100no.of parents(X)=15

Q: Compute the probability of successfully completing the task for an engineer having 24 months of…

A: Given the data of monthly experience of the task is a success or not for 2 engineers as shown below…

Q: You are comparing men and women on hours spent watching TV. You pick a sample of 12 men and 14 women…

A:

Q: A random sample of 120 rhesus monkeys found that the number of rhesus monkeys that live in a captive…

A: Solution-: Let, X= The number of rhesus monkeys that live in a captive breeding facility Given:…

Q: What is a confidence interval in statistics?

A: In inferential statistics, the two types of estimation are: point estimate and confidence interval…

Q: In a survey, 29 people were asked how much they spent on their child's birthday gift. The results…

A: Solution: Let X be the amount spent on their child’s birthday gift. From the given information,…