The aim of a study is to test the ratio of variances in the weight of two groups of rats being under a certain drugs A( group 1) and B( group 2). A random sample of 16 rats was selected from group 1and 13 rats from group 2 Then their weight were recorded. The results are shown in the following table Construct a 95% confidence interval for the ratio of the varliances.

Q: Suppose that the number of students passed a Statistics class are normally distributed. A simple…

A: We have given that  The number of students passed a Statistics class are normally distributed. A…

Q: A study was conducted that measured the total brain volume (TBV) (in mm²) of patients that had…

A: The provided information is as follows:The level of confidence is The data set is given as follows:…

Q: In a simple random sample of 38 bulbs, 25 gives a good glow, What is a 85% score Confidence interval…

A: Given data,n=38x=25sample proportion p=xn=2538=0.66z-value at 85% confidence is Zc=1.44

Q: A technician randomly sampled repair logs for computers at a university. He wanted to find out how…

A: It is given that the proportion of computers that were repaired more than three times in the last…

Q: A random sample of 12 chemists from Washington stats shows an average salary of $39,420 with a…

A: The sample mean one (Washington): x¯1=$39,420, sample mean two (New Mexico): x¯2=$30,215, population…

Q: The failure strengths of a random sample of concrete specimens were found equal to (in ksi): 3.5,…

A: (1) The degrees of freedom is obtained as follows: Df=n–1     =9–1     =8 The critical-value is…

Q: The deflection temperature (°F) of two types of plastic pipe under a specified load is investigated…

A: We have given that,  The data set are : Type 1: 206, 188, 205, 187, 194, 193, 207, 185, 189, 213,…

Q: Step 1- Hypotheses -: Null hypothesis H,: u = 500 (or) The population average weight of tablets is…

A:

Q: A clinic sampled 15 of its patients, based on the sample ,the variance patient waiting time is 16…

A:

Q: In a comparison between the mean waiting times of the customers in two different branches for Fast –…

A:

Q: A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

A: A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

Q: After taking a sample of 300 rice plants, you find the frequency of the betaine aldehyde…

A: Sample size n = 600 We have given that the frequency of the betaine aldehyde dehydrogenase gene…

Q: A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

A: Given that, a study was conducted that measured the total brain volume (TBV) (in mm³) of patients…

Q: • Example: Suppose that the variance o² of the normally distributed diameter lengths of steel balls…

A: Given that Sample size =12 Sample variance=0.022 We have to find 90% confidence interval for the…

Q: Suppose a study similat to example 11 was performed using two second grade classes. Assume the…

A:

Q: In a sample of 600 Ottawa families, it is found that 360 rent their dwellings while 240 own their…

A: It is given that sample size (n) is 360 and x is 240.

Q: An important problem in industry is shipment damage. A electronics distribution company ships its…

A:

Q: Two groups of individuals were compared with respect to a high carbohydrate low- fat diet (LF) and a…

A: Given:     x¯ 1=47.3x¯2=19.3n1=12n2=13s1=28.3s2= 25.8

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

A:

Q: A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

A: A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

Q: (TBV) (in mm²) of patients that had A study was conducted that measure schizophrenia and patients…

A: A study was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

Q: The campus paper reported that the average hours of sleep for students at a neighboring university…

A: Given Data: n=4 Significance value=0.05 x=5+3+6+24=164=4 Sample mean=4 Sample…

Q: tudy was conducted that measured the total brain volume (TBV) (in mm³) of patients that had…

A: Form the above data

Q: A sample of marine iguanas (n=30) from the Galapagos Islands has an average length of 2.8ft with a…

A: given data n=30df=n-1=30-1=29x¯=2.8S2=0.43s=0.43=0.6557CI=0.95α=1-0.95=0.05

Q: You've collected a sample of 14 concrete blocks and weighed them. You want to produce a 99%…

A: Given that there are 14 concrete blocks.Let n = sample size = 14Confidence level is 99%.Significance…

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.