A random sample of n1 = 16 communities in western Kansas gave the following information for people under 25 years of age. x1:   Rate of hay fever per 1000 population for people under 25 99 89 121 127 93 123 112 93 125 95 125 117 97 122 127 88 A random sample of n2 = 14 regions in western Kansas gave the following information for people over 50 years old. x2:   Rate of hay fever per 1000 population for people over 50 94 109 100 95 110 88 110 79 115 100 89 114 85 96   (i) Use a calculator to calculate x1, s1, x2, and s2. (Round your answers to four decimal places.) x1 =  s1 =  x2 =  s2 =  (ii) Assume that the hay fever rate in each age group has an approximately normal distribution. Do the data indicate that the age group over 50 has a lower rate of hay fever? Use ? = 0.05. (a) What is the level of significance?

Q: For each data set, compute the standard deviation. What is the standard deviation of the sample of…

A:

Q: Assume that the crime rate distribution is approximately normal in both regions. (a)Use a calculator…

A: Given : For region in new England given data :…

Q: Use the pulse rates in beats per minute​ (bpm) of a random sample of adult females listed in the…

A: From the provided information, Sample size (n) = 50 Level of significance (α) = 0.01

Q: 4. The following data give the speeds (in miles per hour) of eight cars that were stopped onI-95 for…

A: Given:The speeds (in miles per hour) of eight cars that were stopped on I-95 for speeding…

Q: a)The Table below shows the average score of the150 students sampled from the North America…

A: Given data is Score (out of 100) No. of students 40 - 49 19 50 - 59 32 60 - 69 49 70 - 79…

Q: Suppose a sample of 100 observations are selected randomly with replacement from the dataset. How…

A: Introduction - Sampling interval =number of units in the population desired sample size

Q: The following data represents the age of 30 lottery winners. Given the frequency distribution for…

A: Note: " Since you have posted many sub-parts. we will solve the first three sub-parts for you. To…

Q: A random sample of 10 regions in New England gave the following violent crime rates (per million…

A: Given Let X1 and X2 represent  a random sample of 10 regions in New England and 12 regions in the…

Q: 2. Life expectancy at birth (in years) is shown for a random sample of 60 countries in 1979. The…

A: 2. Step-by-step procedure to obtain the descriptive statistics using Excel is given below: In Excel…

Q: Listed below are the systolic blood pressure measurements (in mm Hg) of a random sample of Americans…

A: The given data set is: 40 and older 175 169 182 146 144 90 92 103 95 105…

Q: Hertz Rent-a-Car must measure the mean gas mileage achieved by its rental cars. The data below is…

A: Given Information: Hertz Rent-a-car must measure the mean gas mileage achieved by its rental cars.…

Q: Public transportation and the automobile are two methods an employee can use to get to work each…

A: Samples for an employee use to get to work using public transportation is…

Q: A random sample of n1 = 10 regions in New England gave the following violent crime rates (per…

A: Given : Claim : the violent crime rate in the Rocky Mountain region is higher than in New England.

Q: Below is the summary table of the duration of long-distance calls repoP 15.2 minutes Population mean…

A:

Q: 130 adults with gum disease were asked the number of times per week they used to floss before their…

A: It is given that 130 adults with gum disease were asked the number of times per week they used to…

Q: 130 adults with gum disease were asked the number of times per week they used to floss before their…

A: Given : 130 adults with gum disease were asked the number of times per week they used to floss…

Q: A paper gave the following data on n = 11 female black bears. Age (years) Weight (kg) Home-Range…

A: Regression

Q: 6. SAT ver instituted a new program to engage students in reading. A sample of nine studets from…

A: Mean refers to the average of a data set. It is obtained by the formula x¯=∑xin, where ∑xi is the…

Q: Here is a sample of the number of cars passing over a bridge per hour during rush ho 404 408 409 416…

A: Quartiles separate a data set into four sections. The first quartile (lower quartile, QL), is equal…

Q: Listed below are the brain volumes (cm3) of randomly selected subjects from a study.  Use a 0.05…

A: Given963,1027,1272,1079,1070,1173,1067,1347,1100,1204sample size(n)=10significance level(α)=0.05

Q: A random sample of n1 = 10 regions in New England gave the following violent crime rates (per…

A: The data shows the violent crime rates in two regions (New England, Rocky Mountain states).

Q: What was the sample size? What percent of participants had a score of 4? of 5? What is the score…

A: Given that,The frequency distribution is,Scoref71867752047332113total129

Q: 130 adults with gum disease were asked the number of times per week they used to floss before their…

A: a) The frequency of a class or observation is the number of values corresponding to it.

Q: Twenty patients sampled at random were matched by age and BMI. One of each pair was assigned at…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: What would you predict the eyelash length to be for a mammal with an eye width of 1.25

A: Given Equation :

Q: The average time a task is performed, according to a report, is 10.4 minutes. To corroborate this, a…

A:

Q: The heights (in centimeters) of some randomly selected Men's World Cup soccer players from both…

A: Solution To find the test statistic we will use t test for independent samples .

Q: 2. The following data set belongs to a sample: 14 18 -1 0 8 8 -16 Calculate the mean, median, and…

A: 2. Step-by-step procedure to obtain the mean, median and mode using Excel is given below: In Excel…

Q: The following data represent tree trunk circumferences (in mm) foa a random sample of 60 6-year old…

A: The data on tree trunk  circumferences (in mm) is given…

Q: The following data set is composed of incidence rates of Kaposi’s sarcoma in 20 different regions of…

A: Given  sample size   =  20 For the given dataset which indicates the incident rates of Kaposi's…

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.