we assume the average number of teeth lost in the 5−9 group is 7 teeth and the average number of teeth lost in the 10+ group is 12 teeth, what is the best estimate of the average number of teeth lost and its standard deviation per year

Q: Suppose a sample of 60 business majors revealed that the average time spent studying per week is 22…

A: A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: What is the maximum blood pressure reading of the lowest 70% of adult males?

A:

Q: Assume you are comparing 2 brands of dishwashers. Bfand A has a mean of 72 months with a standard…

A: Standard deviation and mean are related as explained below: If standard deviation is more, then the…

Q: Loretta, who turns  91  this year, has heard that the mean systolic blood pressure among the elderly…

A: State the hypotheses. That is, there is no evidence that the mean systolic blood pressure among…

Q: The results of a common standardized test used in psychology research is designed so that the…

A:

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 270 days…

A: Find "z": Refer Standard normal table/Z-table, Lookup for z-score corresponding to area 0.84…

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: The random variable systolic blood pressure is normally distributed. The population mean is 120. The…

Q: Suppose the distribution of maximum monthly January temperatures in Sydney is normal with mean, μ =…

A:

Q: USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: Given data: Sample 1: Male Mean = $135.67  Standard deviation = $35 Sample size  = 40 Sample 2 :…

Q: heights of adult women in the United States are normally distributed with a mean of 65 inches and a…

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 10% or…

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Given Let X : The average hours of sleep on a weeknight mean = μ= 6.9  standard deviation = σ= 1.5…

Q: oretta, who turns  91  this year, has heard that the mean systolic blood pressure among the elderly…

A: Given: Sample size (n)= 19 Sample mean x¯=130 Sample standard deviation (s) = 20 Hypothesized mean…

Q: Assume that the time a student stays in school is normally distributed with a mean of 5 hours and a…

A: Given: μ=5 and σ=0.5.   The z-score is calculated asz=x-μσ

Q: The principal decided that the top 30% of the class with the highest grades in statistics will be…

A:

Q: Suppose the graduation rate from the last 5 years at wayne state university hasw standard deviaton…

A: Standard deviation:Standard deviation helps to identify the spread of data for a group from the…

Q: a population was normally distributed with a mean of 10 and standard deviation of 2. What…

A: Given data,Mean μ=10sd    σ=2P(X<12.5)=?

Q: A recent study in the restaurant business determined that the mean tips for male waiters per hour of…

A:

Q: Suppose that heights of adult men in the United states are normally distributed with a mean of 71…

A:

Q: The average expenditure in a sample survey of 42 male consumers was $135.67, and the average…

A: Given: Population mean expenditure, μ=100.89              Sample size for men, n1= 42…

Q: What is the correct answer for letter B?

A: b. From part a. the point estimate is observed to be 67.03 and from part c. the 99% confidence…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Population mean = 140 Population standard deviation = 40 Score =X= 44

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: As per bartby gaidline excite have to ans fast three subpart part only dear student please upload…

Q: A researcher polled a sample of  1087  adults in the year  2010 , asking them how many hours per…

A: Given that  Sample sizes n1=1087      , n2=1046      Sample means X̄1=10.49      , X̄2=9.45    ?1…

Q: In 2002, the mean age of an inmate on death-row was 40.7 years, according to data from the US…

A:

Q: A consultant wants to estimate the average income of all the baby boomers in NYC. From prior…

A:

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: If the average low temperature of a winter month in Rochester, NY, is 21∘ and the standard deviation…

A: It is given that eh mean is 21 and the standard deviation is 3.7.

Q: Assume that the test scores for a large class are normally distributed with a mean of 64 and a…

A: Solution-: Given: We find P(the class received a higher score than 78)=?

Q: t is known that the average time required to complete a test exam is 80 minutes and the standard…

A: Given Information: Mean μ=80 min Standard deviation σ=10 min. To find how many minutes should the…

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A:

Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Information: Population mean (u) = 165  Standard deviation (σ) = 10  Score earned by a subject…

Q: The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: For Male : Mean , x¯1 = 135.67Standard deviation, σ = 36n1 = 47   For Female : Mean , x¯2 =…

Q: One year Perry had the lowest ERA (earned-run average, mean number of runs yielded per nine innings…

A: Given: For males, the mean ERA μ is 3.771 and standard deviation σ is 0.861. The mean ERA of Perry…

Q: Assume that human body temperatures are normally distributed with a mean of 98.23 degrees Upper F…

A: Step-by-step procedure to obtain the percentage using MINITAB:Choose Graph > Probability…

Q: Assume that human body temperatures are normally distributed with a mean of 98.23 degrees Upper F…

A: It is given that human body temperatures follows normal distribution with mean of 98.23 and standard…

Q: uppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is…

A: Given data,n=30Population mean μ=70sample mean is x=73sd is s=3test statistic t=?

Q: if an average score of exams was 74 points for 24 students  the 25th student got 64 points whats…

A:

Q: The average age of senators in the 108th Congress was 58 years. If the standard deviation was 11…

A: Average or mean (μ) = 58 years and standard deviation (σ) = 11 years  Then, We will find the z…

Q: Brooklyn earned a score of 850 on Exam A that had a mean of 550 and a standard deviation of 100. She…

A: Here we are to assume that scores on each exam are normally distributed.   For exam A, Brooklyn…

Q: me that the heights of women are normally distributed with a mean of 62.9 inches and a standard…

A: To calculate the 75th percentile of a normal distribution, we used the formula as: X=μ+Zσ Where 'X'…

Q: The results of a common standardized test used in psychology research is designed so that the…

A: From the provided information, Mean (µ) = 175 Standard deviation (σ) = 10 X~N (175, 10) Here X be a…

Q: According to the Census Bureau, the mean number of people in a typical American household in 2010…

A: It is given that the mean number of people in a typical American household in 2010 was 2.6 with a…

Q: The winner for Best Male Actor is 35 years old and winn3er for Best Female Actress is 47.  The mean…

A: The z-score for male actor is, z=x-μσ=35-45.15.9=-10.15.9=-1.71 The z-score for male actor is -1.71.…

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: Given: μ = 115 x¯ = 133 s = 23 ∝ = 0.05 n = 10 The test hypothesis are, H0: μ = 115 H1: μ > 115.…

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: (a) The null and alternative hypothesis is; Ho: μ=120H1: μ>120 (b) Here we will be using…

Q: on the test was 450 and the standard deviation was 50.  If the board wants to set the passing scores…

A: According to the sum, the board of examiners that administers the real estate broker’s examination…

Q: Assume that the time a student stays in school is normally distributed with a mean of 5 hours and a…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: Suppose scores on an IQ test are normally distributed, with a population mean of 100. Suppose 20…

A:

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Do…

A: Given data : Given Data : For male x̄1 = 136.64 n1 = 44 σ1= 35 For…

Q: The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: What is the point estimate of the difference between the population mean expenditure for males and…