The probability that the mean salary of the sample is less than $58,000 is (Round to four decimal places as needed.)

Q: When the points on a normal probability plot lie approximately on a straight line, then you know the…

A: In the given problem the statement is “When the points on a normal probability plot lie…

Q: A random sample by the National Institutes of Health included 2253 men to determine the proportion…

A: Given x=986 n=2253

Q: With a normal curve, the probability of a score occurring above the mean is _____. a.)  0 b.)  0.5…

A: GivenThe probability of score occurring above the mean

Q: In a negatively skewed distribution, the mean will generally be the median. O a. Less than O b.…

A:

Q: The p-value… is used to determine the Margin Of Error measures the number of standard deviations…

A: p value is a probabilty  which indicates the decision about null hypothesis assuming true  so that…

Q: 9% of all cars fail the emissions inspection, find the probability that in a sample of 125 cars, 16…

A: Given n=125 P=0.09

Q: A sample mean has a z= -4.0 on the sampling distribution created from the population of psychology…

A:

Q: You are curious about how the mean age of cars compared for students and faculty. You take a random…

A:

Q: The probability of winning the "grand prize" at a fortune spinning wheel is p=0.2. Assume you record…

A:

Q: The value of the stanard error of the mean for the scores :  1,2,3,4,5 ?

A: Solution: Let X be the random variable. The given data is 1, 2, 3, 4 and 5.

Q: Question Help ▼ st Ho: u= 50 versus H,: µ<50, a random sample of size n 22 is obtained from a…

A:

Q: It was hypothesized that there will be a difference in the average test score in Chemistry class…

A: Denote μ1, μ2 as the true average test scores in Chemistry class between high schoolers who watched…

Q: Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship…

A: The formula for the confidence interval is,where,denotes the predicted value of yse denotes the…

Q: It was hypothesized that there will be a difference in the average test score in Chemistry class…

A: Denote μ1, μ2 as the population average test scores in Chemistry class of high schoolers who watched…

Q: find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: Within any distribution of scores, the location specified by z = +1 and the location specified by z…

A:

Q: The probability is 0.7 that a person shopping at a certain store will spend less than​ $20. For…

A: It is an important part of statistics . It is widely used .

Q: As a sample gets smaller and smaller, the sample mean tends to get closer and closer to the…

A: According to the law of large numbers (LLN) says that if we take samples of large size from any…

Q: Find the probability that the mean for 20 randomly selected distances is greater than 195.70 cm.

A: Given that.   X~N( μ , ?)   μ=197.5     , ?=8.9   Z-score =( x - μ )/?

Q: A dice is rolled three times a. Find the probability of getting exactly 2 fours  b. Find the mean,…

A: Let X be a random variable from Binomial distribution with parameter n and p. Mean = np  Variance=…

Q: research company surveyed 1024 people who routinely fly for business travel purposes and found that…

A:

Q: c. The test-statistic for this data = (Please show your answer to three decimal places.) d. The…

A: The Chi-square test statistic for the given attributes, to test any possible association is given…

Q: Psychology students at a university completed the Dental Anxiety Scale questionnaire. Scores on the…

A: Given that, mean = μ=12, and standard deviation =σ=3.5

Q: An industrial designer wants to determine the average amount of time an adult spends building an…

A: Given information: Confidence level = 95% Significance level α=0.05 The given data is as follows:…

Q: Suppose that the mean weight of a particular type of ripe tomato is 155 g, and the variance of the…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: A study found that 1.21% of Social Security recipients are too young to vote. If 800 Social Security…

A:

Q: In a psychology class, 40 students have a mean score of 89.5 on a test. Then 24 more students take…

A: Given,n1=40 , x¯1=89.5n2=24 , x¯2=78.3

Q: Find the variance of the probability distribution for the histogram shown.

A: Given a histogram, we need to find variance of X

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A: Given,mean(μ)=312P(X&gt;319)=0.28

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.