Working with the Concepts 15. Is there a doctor in the house? The market research firm Salary.com reported that the mean annual earnings of all family practitioners in the United States was $178,258. A random sample of 55 family practitioners in Los Angeles that month had mean earnings of i $192,340 with a standard deviation of $42,387. Do the data provide sufficient evidence to conclude that the mean salary for family practitioners in Los Angeles is greater than the national average? State the null and alternate hypotheses. b. Compute the value of the t statistic. How many degrees of freedom are there? c. State your conclusion. Use the a = 0.05 level of significance.
Want to see the full answer?
Check out a sample Q&A here
Related Statistics Q&A
Find answers to questions asked by students like you.
Q: Please show TI 84 steps
A: According to the provided data, the sample size, n is 1100 with the probability of success, p is 0.8...
Q: The age of children in kindergarten on the first day of school is uniformly distributed between 4.71...
A: From the given information, the random variable X as the age of children in kindergarten on the firs...
Q: The student council is hosting a drawing to raise money for scholarships. They are selling tickets f...
A: The cost of a single ticket is $6. Total tickets are 700.There are 1 prize with $1,000, 3 prizes wit...
Q: Please show TI 84 steps
A: Consider X to be the random variable, defined as the lead level in water specimens with sample mean ...
Q: According to a poll of adults, about 4848% work during their summer vacation. Assume that the true...
A: From the given information, it is clear that sample size, n = 600.The probability of success, p hat ...
Q: Use the following data to conduct a one-sample t test in SPSS (with α = 0.05) to determine if the sc...
A: The hypotheses of the test are given below:Null hypothesis:H0: µ = 100.Alternative hypothesis:H1: µ ...
Q: I don't understand how to solve this
A: It is given that the proportion of all female heart transplant patients will survive for at least 3 ...
Q: Assume that a procedure yields a binomial distribution with a trial repeated n=13n=13 times. Use eit...
A: Giventotal number of trails = n = 13probability of success = p = 0.46To find the probability of 1 su...
Q: Explain the difference between a stratified sample and a cluster sample. (Select all that apply.) In...
A: Cluster sampling is a sampling method in which the researcher divides the population into clusters, ...
Q: Please show ti 84 steps
A: Given information:Here, the mean change in score corresponding to Math is x-bar=18; standard deviati...
Q: Provide an appropriate response with details. A 28 year old man pays $206 for a one year life insura...
A: From the given information, the probability of he will live through the year is 0.9992. And a 28 yea...
Q: In a test of the effectiveness of garlic for lowering cholesterol, 48 subjects were treated with ga...
A: Given sample mean = 3.2Sample standard deviation = 16.8The 95% confidence interval has 0.975 area to...
Q: Problem 31
A: The null and alternative hypotheses are given below:
Q: A manufacturer of automatic car transmissions uses steel gears. An important characteristic of these...
A: 1. The number of different treatment combinations is 6 and it is calculated below: From the given in...
Q: The age of children in kindergarten on the first day of school is uniformly distributed between 4.73...
A: Let X be the random variable uniformly distributed between 4.73 and 5.75 years.Denote X as the age o...
Q: Use the accompanying data set to complete the following actions. a. Find the quartiles. b. Find the ...
A: a.Obtaining quartiles of this data:The first quartile for the given data can be obtained by entering...
Q: Please show TI 84 steps
A: Click to see the answer
Q: What is a P value?
A: The p-value is also called as probability value.
Q: Personnel tests are designed to test a job applicant's cognitive and/or physical abilities. A part...
A: It is given that the mean and standard deviation are 74 and 7.4, respectively.
Q: Please use ti 84 steps
A: It is given that x is 290 and n is 500.
Q: Today, the waves are crashing onto the beach every 5.8 seconds. The times from when a person arrives...
A: From the given information, the random variable X as he times from when a person arrives at the shor...
Q: State the appropriate null hypothesis H0 and alternative hypothesis Ha in each of the following case...
A: From the given information, it can be observed that the null and alternative hypothesis area shown b...
Q: Typing errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors t...
A: The sample size, n is provided as 10. The probability of error caught is 0.7. Therefore, the probabi...
Q: the following display from a Ti-84 plus calculator presents a 95% confidence interval. Tinterval: (5...
A: It is given that the 95% confidence interval is (57.84, 60.48).
Q: Consider a binominal experiment with 2 trials and p=0.04 a. compute the probability of 1 success, f(...
A: a) The probability of 1 success is 0.0768 and it is obtained below: From the given information, the ...
Q: Births are approximately uniformly distributed between the 52 weeks of the year. 1 1 sxs53 f(x) = 52
A: Solution:Continuous uniform distribution:A random variable X is said to have the rectangular distrib...
Q: Assume that a national fitness study reports that 5% of millenials exercise daily. Suppose that a re...
A: Solution: We are given that a random variable X that represents the number of millenials in the samp...
Q: Explain when you would use the z value or the t-value to calculate a confidence interval
A: Z value: The z value is used for finding the confidence intervals for single population proportion, ...
Q: the table below is a joint probability table that display the joint probablitly distribution of the ...
A: Note:Hi there! Thank you for posting the question. Since the table is not clear, we observed the fol...
Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.4 year...
A: Given information:Mean, µ=14.4Standard deviation, σ=3.8Sample size, n=23
Q: Describe the distribution of this variable by commenting on the shape (modality (how many peaks), sy...
A: Form the given graphs1st graph is uniformly distributed2nd graph is skew distributed (right skewed d...
Q: The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if...
A: Solution: We are given:
Q: A hypertension trial is mounted and 12 participants are randomly assigned to receive either a new tr...
A: 1.Hypotheses for the test is given below:
Q: In jumbled box of pens and pencils, the probability of randomly choosing a sharpened pencil is .54 a...
A: Given dataprobability of randomly choosing a sharpened pencil P(S) = 0.54probability of randomly cho...
Q: I only been b,c,and d.
A: a.The mean of this data set is obtained below:
Q: The local news reported that 6% of U.S. drivers text on their cell phones while driving. If 300 dri...
A: Normal approximation to the binomial:From the given information, it is clear that sample size, n = 3...
Q: Suppose 36 participants complete an experiment where ads are presented subliminally during a task (e...
A: a). From the provided information, the null and alternative hypothesis can be stated as:H0:µ=0.50, t...
Q: Suppose that you randomly selected 23 adults. Assume 20% of the population smoke. Round all answers...
A: It is given that the random variable X, number of smokers follows a binomial distribution with n=23 ...
Q: How many different three-letter words (including nonsense words) can be formed such that the two let...
A: The permutation can be used to find the number of ways by which a set of objects can be arranged whe...
Q: Assume that random guesses are made for ninemultiple choice questions on an SAT test, so that there...
A: Given datan = 9p= 0.4Applying Binomial theoremProbability of x success out of n trial is given by
Q: Sam computed a 90% confidence interval for μ from a specific random sample of size n. He claims that...
A: Sam computed a 90% confidence interval for µ from a specific random sample of size n.
Q: For a normal population with a mean of m=80 and a standard deviation of 10, what is the probability ...
A: It is given that the mean and standard deviation are 80 and 10, respectively.
Q: Given a population where p = 0.10, find the standard deviation of the samping distribution when n = ...
A: Click to see the answer
Q: Problem 29 d.
A: The null and alternative hypotheses are given below:H0: µ = 21.62Ha: µ ≠ 21.62Procedure to find samp...
Q: 3. A medical researcher examined the number of asthma attacks patients had both before and while usi...
A: Hello there! there are more than three subparts in the question. According to our policies we cannot...
Q: Based on a survey, assume that 45%of consumers are comfortable having drones deliver their purchas...
A: From the given information,45% of consumers comfortable having drones deliver their purchases.That m...
Q: In 2008, the Detroit Lions set an NFL record by losing all 16 regular season games. Suppose that the...
A: Consider X is a random variable which represent the number of wins out with probability of success, ...
Q: Suppose the distribution of speeds of cars traveling on the I-5 in California is nearly normal with ...
A: Solution:a.The percentage of cars travel above the speed limit is obtained below:Let the random vari...
Q: The mean score on a driving exam for a group of driver's education students is 60 points, with a s...
A: Solution:From the given information, k value is 22, standard deviation of points is 4 and mean numbe...
Q: Jobs and productivity! How do banks rate? One way to answer this question is to examine annual profi...
A: (a)Using the provided data, the sample mean can be calculated using Excel function “AVERAGE()”.Enter...
