Is there a doctor in the house? A market research firm reported the mean annual earnings of all family practitioners in the United States was $178,258. Arandom sample of 58 family practitioners in Los Angeles had mean earnings of x = $193,100 with a standard deviation of $42,627. Do the data providesufficient evidence to conclude that the mean salary for family practitioners in Los Angeles is greater than the national average? Use the a = 0.05 level ofsignificance and the P-value method and Excel.Part: 0 / 5Part 1 of 5(a) State the appropriate null and alternate hypotheses.Ho:H₁:This hypothesis test is a (Choose one) test.left tailedright-tailedtwo-tailed

Answered: Is there a doctor in the house? A…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A Statistics instructor wanted to compare the scores on the same final exam given to students at a local community college and local university. The Statistics instructor feels that students at the community college would be better prepared and have higher exam scores on the final exam. After grading the final exams from both institutions, the Statistics instructor found that for a sample of 36 community college students, the sample had a mean score of 84 with a standard deviation of 3.4. A sample of 45 university students had a mean score 79 with a standard deviation of 2.6. Construct a 95% confidence interval for the difference between population mean exam scores. Round your final results to one decimal place. _____________ ≤ ??? − ????? ≤ ______________
It has been found that with the standard dosage of a drug, the change in people’s uric acid levelis normally distributed with a mean of 240 and a standard deviation of 60. What proportionof people receiving the standard dosage of this drug experience changes in uric acid levelbetween 210 and 270?
Describe the scores in a sample that has a standard deviation of zero
Cholesterol is a fatty substance that is an important part of the outer lining (membrane) of cells in the body of animals. Its normal range for an adult is 120-240 mg/dl. The Food and Nutrition Institute of the Philippines found that the total cholesterol level for Filipino adults has a mean of 159.2 mg/dl and 83.89% of adults have a cholesterol level below 200 mg/dl. a. Determine the standard deviation of this distribution. Ans = Blank 1 mg/dl b. What is the value of the cholesterol level that exceeds 99% of the population? Ans = Blank 2 mg/dl Blank 1 Add your answer Blank 2 Add your answer
The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6 years for whites and 33 years for nonwhites. (Click here for reference data) Suppose a survey of randomly selected death records for white and nonwhite people born in 1900 from a certain county is conducted. Of the 110 whites surveyed, the mean life span was 48.2 years with a standard deviation of 11.2 years and of the 95 nonwhites, the mean life span was 39.3 years with a standard deviation of 16 years. Conduct a hypothesis test at the 0.05 level of significance to determine whether there was no difference in mean life spans in the county for whites and nonwhites in year 1900. Preliminary: Is it safe to assume thatnw≤5% of all white people born in 1900 andnnw≤5% of all nonwhite people born in 1900? No Yes Is nw≥30 and nnw≥30 ? No Yes Test the claim: Determine the null and alternative hypotheses. H0: μw μnw Ha: μw μnw Determine the test statistic. Round to four…
Mary's height is 68 inches, in comparison to a group whose height is 65.5 inches with standard deviation of 1.5 inches. What is the z-score of Mary's height? What does the result tell you?
Assuming that the heights of college women are normally distributed with a mean of 62 inches and standard deviations 3.5 inches, what percentage of woman are taller than 62 inches?
What is the equation for The standard deviation of the distribution of sample means
The admission committee of AUCA passes 33% of those who took the exam. If the scores follow a normal distribution with a mean of 85 and a standard deviation of 9, what is the passing score?
............
A survey found that the mean commute time is 25.4 minutes for the fifteen largest U.S. cities.The Austin, TX, chamber of commerce feels that Austin's commute time is less. A survey of 25 randomly selected commuters had a mean of 22.1 minutes with a standard deviation of 5.3minutes. At the 10% level, does the survey data suggest that Austin commute time is significantly less than the national average?Your answer should have the following: 1). Significance Level: Alpha =2). Sample Size: n = 3). Sample X =
An economist would like to estimate the mean amount of money that a family spends to within $82. If the amount spent by a family is considered to be normally distributed with a standard deviation of $490, what sample size would be necessary to be 96% confident?

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