According to official data, the average annual expenditure on dental care in Kingston, Jamaica is at least $60,000 per person. A random sample of 64 persons showed that they spent an average of $55,000 on dental care last year with a standard deviation of $10,350. Test at the 5% significance level whether last year’s mean annual dental care expenditure per person in the parish was less than $60,000. c) find value of test statistic.

Q: The average duration of incoming telephone calls to a store was 9.4 minutes. The manager wants to…

A: Given: Sample mean duration of calls x¯=10.2 Sample standard deviation (s) = 4.8 Sample size of…

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A: Obtain the 99% confidence interval for the population mean. The 99% confidence interval for the…

Q: The U.S. Census Bureau reported that the mean area of U.S. homes built in 2012 was 2505 square feet.…

A: Answers are:

Q: Test the claim that average weight loss for a month for those dieting on weight watchers is 7.5…

A: From the provided information, Sample size (n) = 35 Sample mean (x̅) = 6.9 pounds Sample standard…

Q: All children who apply for admission to the Excellence Academy are given a placement exam. The…

A: Given, μ=65σ=10x<50 To calculate proportion using z, z=x-μσ

Q: K According to researchers, the mean length of imprisonment for motor-vehicle-theft offenders in a…

A: Solution: Given information: n= 100 Sample size  x= 18.5 months  sample mean μ=17.4 months…

Q: The mean mathematics SAT score for all people who took the SAT in a particular year was 514 with a…

A: The mean mathematics SAT score for all people who took the SAT in a particular year was 514 with a…

Q: The average student-loan debt is reported to be $25,235. A student believes that the student-loan…

A: a)  Consider that μ is the population student-loan debt.   The null and alternative hypotheses…

Q: An online statistics professor recommends that students plan to spend approximately 15 hours per…

A: Given data,Mean (µ) = 15 hours Standard deviation (σ) =2.6 hours

Q: 8. Is there a doctor in the house? The Bureau of Labor Statistics reported that in May 2009, the…

A:

Q: A food distribution company claims that a restaurant chain receives, on average, 26 pounds of fresh…

A: We want to find test statistics and P-value

Q: Suppose you plan to take a survey of Math&146 students asked how many miles they commute from their…

A: Given,Confidence Interval = 95%ME= Margin of Error =1.5σ=Population Standard Deviation=5.3

Q: STEP ONE: STEP TWO: STEP THREE: STEP FOUR: STEP FIVE: STEP SIX: Test Statistic: Critical Value(s):

A: n1 = 123 n2 = 290   x1 = 0.83 x2 =1.39   s1 = 1.77s2 =3.06

Q: In a sample of 57 high school teachers in Texas their average salary was found to be $44550 with a…

A:

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: In an effort to estimate the mean amount spent per customer for dinner at a major Atlanta…

A: The following information is provided:

Q: An article in the Podunk County Times claims that children in the county watch an average of 3 hours…

A: a) The hypotheses for the test are given below. Null hypothesis: H0: µ = 3 Alternative hypothesis:…

Q: People who diet can expect to lose an average of 3kg in a month. In a book, the authors claim that…

A: given dataclaim: people who follow a new diet will lose an average of less than 3kg in a month.…

Q: According to a new study by ABC, the average time spent by young adults ages 20 to 25 in using their…

A: Given information Level of significance=0.10, n=sample size=30, sample mean x̄=7.8, s=sample…

Q: According to a new study by ABC, the average time spent by young adults ages 20 to 25 in using their…

A: Given that

Q: 3. Consumer Reports indicated that the mean braking distance (from 60 miles per hour) on wet…

A: GivenMean(x)=150standard deviation(s)=26.5sample size(n)=45significance level(α)=0.05

Q: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: Given that a tire manufacturer producing tire with an average life expectancy of μ=26 ( in thousand…

Q: A male college student claimed that college men spend more time working out than college women. A…

A: Let μM and μF denote the population mean of the men data and the women data. The sample size for…

Q: After an exhaustive university-wide student survey, it was found that the IQ scores of Brac…

A:

Q: assuming a standard deviation of $ 19,951 construct a 90% confidence interval for estimating the…

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

Q: he University of Sydney conducted a survey to find out the average number of hours an academic…

A: Given information- Population standard deviation, σ = 2 hours Confidence interval = 0.95…

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: Let X represents the time spent on their child's last birthday gift.  Given that the shape of the…

Q: Suppose that a manufacturer of laptop batteries claims that his product last more than 950 hours.…

A: Given data : sample size, n = 45 sample mean, x̄ = 925.0 sample standard…

Q: The U. S. Air force requires that fighter pilots have heights between 64 and 77 inches. the women's…

A:

Q: Jose and Maria were asked by their teacher to describe a set of data that falls within the middle…

A: Given that  Jose and Maria were asked by their teacher to describe a set of data that falls within…

Q: The U.S. Census Bureau reported that the mean area of U.S. homes built in 2012 was 2505 square feet.…

A:

Q: A medical researcher is interested in the prenatal care received by pregnant women in inner cities.…

A: A sample of 20 randomly selected women with children on the streets of Baltimore and the average…

Q: - Determine the decision rule for rejecting the null hypothesis Ho. Round the numerical portion of…

A: The sample size for first group is 43 and for second group is 57.

Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The…

A: Empirical rule is given below;

Q: newspaper article stated that the average full-time college student works at least 25.4 hours per…

A: Given that  Sample size n =135 Sample mean=25.1 Standard deviation =1.7

Q: A medical researcher is interested in the prenatal care received by pregnant women in inner cities.…

A: We have given that  Sample size n=20 , sample mean =4  s=1 , 95%confidence.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.