A researcher reports that the average salary of assistant professors in a certain state is $42,000. A random sample of 30 assistant professors in that state has a mean salary of $43.260 and a standard deviation of $5230. Assuming that the population is normally distributed, use the graphing calculator to find the P-value. (Round answer to two decimal places.)

Q: An officer of a certain agency claims that the mean monthly income of a family that lives in a…

A: The random variable monthly income of a family follows normal distribution. We have to write the…

Q: Suppose that the sample dataset of July 1 temperatures consisted of 64 observations and that these…

A: given data standard deviation s = 4 sample size n = 64

Q: An oceanographer claims that the mean dive duration of a North Atlantic right whale is 11.3 minutes.…

A: Given: Sample size, n=35Sample mean, x¯=12.2Sample sd, s=2.2

Q: Customers at a certain pharmacyspend an average of $54.40, with a standard deviation of $13.50.…

A: It is given that customers at a certain pharmacy spend an average of 54.40, with a standard…

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: Step-by-step procedure to obtain descriptive statistics using EXCEL Add-Ins: Go to Data>Data…

Q: The librarian at the local school claims that, on average, the books in the library are more than 20…

A: Given : The 30 books produce an average age of M = 23.8 years with a standard deviation of 8.22…

Q: In a two - tailed test, given that the population mean is 40 with a standard deviation of 2.5. A…

A:

Q: According to an officer in the Health Care Financing Administration, the average annual expenditure…

A: Given : Claim : The average annual expenditure on toiletries is RM110 per person in Malaysia.

Q: A shop owner claims that on average, his shop has a daily turnover of R75 000. Test this claim at…

A: The answer is attached below,

Q: . The following dotplot shows the number of three-point shots made by each of the 30 NBA teams in…

A: Given information: The data represents the values of the number of 3-point shots made by each of the…

Q: If family income is positively skewed in a study with a standard deviation of $18000, knowing the…

A: Given information: The distribution of family income is positively skewed. The median family income…

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, final exam score follows normal distribution mean 73 and standard deviation 8. Grades are…

Q: A quart of Parker's milk contains a mean of 39 grams of butterfat, with a standard deviation of 2…

A: Mean = 39 Standard deviation = 2

Q: Calculate the standard deviation of the following four observations: 12,13,15,20

A:

Q: A firm specializing in the preparation of income tax returns, claims the mean refund for customers…

A: State the hypotheses.

Q: A used car dealer says that the mean price of a​ three-year-old sports utility vehicle is ​$19,000.…

A: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we will…

Q: A population is normally distributed with a mean of 50 and a standard deviation of 10. Find the…

A: Given data,Mean μ=50sd    σ=10P(X<44)=?

Q: At a customer service call center for a large company, the number of calls received per hour is…

A:

Q: Suppose a company produces lightbulbs with a mean lifetime of 1000 hours and a standard deviation of…

A: Given that, Mean= 1000 And standard deviation, sigma= 50 We know that, Z Score= (X-mu)/sigma

Q: A manufacturer claims that a new design for a hands-free bluetooth device has increased the range to…

A: The following information is provided. Sample size, sample mean and sample standard deviation.…

Q: Given a mean price of a residential real estate sales of KD 527,000 and a standard deviation of KD…

A: To find the probability of: a) having a sale above KD 550,000 b) having a sale below KD 527,500

Q: In an exam for a statistics class, the class average is 68 with a standard deviation 4. If a student…

A: Given mean μ= 68, standard deviation σ= 4 Let X: score of the students = 75

Q: The salaries at a corporation are normally distributed with an average salary of $59,000 and a…

A:

Q: The number of incoming students at two campuses of a midwestern university have historically been…

A: Given that the main campus incoming class has a mean of 3,916 and a standard deviation of 375.…

Q: A business owner usually requests freelancers to work with, where he pays his freelancers an average…

A: From the given information, the mean is 15.90 and standard deviation 1.50.

Q: Find the standard deviation for the grouped data.

A: Solution; Interval Frequency (f) midpoint(x) fx (x-x)2 f*(x-x)2 50-59 7 54.5 381.5 351.5625…

Q: The distribution of room and board expenses per year at a four-year college is normally distributed…

A: Given : Mean = μ = 5850 Standard deviation = σ = 1125 Sample size = n = 20

Q: The SAT Math scores have a bell-shaped distribution with a Mean of 567 and a Standard Deviation of…

A: We have given that,  Let the SAT scores are normally distributed with mean (mu) = 567 and standard…

Q: If one normal distribution has a standard deviation of 5, and another has a standard deviation of…

A: Given that  One normal distribution has standard deviation is 5. Another has standard deviation of…

Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

A: Obtain the sample size. The sample size is obtained below as follows: The formula of sample size is,…

Q: Is the standard deviation of the sample a good estimate of the variation of salaries of TV…

A: Sample standard deviation is always an unbiased estimate of population sd.

Q: If the grades on a statistics test are normally distributed with a mean of 80 and a standard…

A: The probability is equal to the area under the curve of normal distribution. So the probability that…

Q: A waitress believes the distribution of her tips has a model that is slightly skewed to the right​,…

A: a) The probability that she will earn at least $350 is obtained below: From the given information,…

Q: Most exhibition shows open in the morning and close in the late evening. A study of Saturday arrival…

A: From the provided information, Mean (µ) = 2 hours and 2 minutes or 122 minutes Standard deviation…

Q: investors commonly use the standard deviation of the monthly percentage return for a mutualfund as a…

A:

Q: The distribution of the annual incomes of a group of middle management employees approximated a…

A: In question, The distribution of annual income of middle management employees approximated normal…

Q: The annual precipitation amounts in a certain mountain range are normally distributed with a mean of…

A: Mean(µ) = 88Standard deviations (σ) = 10 X ~ N (µ, σ )= N(88, 10)

Q: calculate the standard deviation of the following four observations: 13,14,16,18

A:

Q: When comparing two​ populations, the larger the standard​ deviation, the more dispersion the…

A: Note: Thank you for the question. Since only the statement is given, we have considered it as a true…

Q: For the binomial distribution, which formula finds the standard deviation? Choose the correct answer…

A: Given X~Bin(n,p)

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given Information :  In a large section of a statistics​ class, the points for the final exam are…

Q: A firm specializing in the preparation of income tax returns, claims the mean refund for customers…

A: State the hypotheses.

Q: calculate the standard  deviation for the following data set   2  4   3    7    2   roundup to 2…

A: A mean of a data set is the average value of the data. The mean of a dataset is computed by dividing…

Q: A statistical analysis of a very large sample of fully-assembled medical devices indicates that the…

A:

Q: The batteries from a certain manufacturer have a mean lifetime of 820 hours, with a standard…

A: The mean is 820 hours and the standard deviation is 70 hours.

Q: The annual incomes of all MBA degree holders working in Los Angeles have a bell-shaped distribution…

A: From the provided information, Mean (µ) = $78,000 Standard deviation (σ) = $11,000 Let X be a random…

Q: A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5…

A:

Q: A financial researcher in Malaysia found that the monthly expenditure for a household staying in…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: In a particular city, the annual income of the population is normally distributed with a mean of…

A:

Q: The IQ scores of a large group of students are approximately normally distributed with a mean of 100…

A: