All of these are determined by sound source and medium  only  EXCEPT

What has the highest attenuation of these materials? 

What is the PRF in soft tissue, if depth is 10cm?

What is the decibel change if a signal strength is increased by a factor of 100

What is the attenuation coefficient of a 8MHz probe?

The product of attenuation coefficient and path length is defined as

The price of a particular brand of jeans has a mean of $37.99 and a standard deviation of $7. A sample of 49 pairs of jeans is selected. Use Excel to answer the following questions:a.What is the probability that the sample of jeans will have a mean price less than $40?b.What is the probability that the sample of jeans will have a mean price between $38 and $39?c.What is the probability that the sample of jeans will have a mean price within $3 of the population mean? ​

The following data represent the number of flash drives sold per day at a local computer shop and their prices:Price (x)Units Sold (y)$343  364  326  355  309  382  401​a.Develop a least squares regression line and explain what the slope of the line indicates.b.Compute the coefficient of determination and comment on the strength of relationship between x and y. c.Compute the sample correlation coefficient between the price and the number of flash drives sold. Use α = 0.01 to test the relationship between x and y. ​

Connie Harris, in charge of office supplies at First Capital Mortgage Corp., would like to predict the quantity of paper used in the office photocopying machines per month. She believes that the number of loans originated in a month influences the volume of photocopying performed. She has compiled the following recent monthly data:​Number of LoansOriginated in MonthSheets of PhotocopyPaper Used (1000s)45222513502460254021251635184025a. Develop the least squares estimated regression equation that relates sheets of photocopy paper used to loans originated.b. Use the regression equation developed in part (a) to forecast the amount of paper used in a month when 42 loan originations are expected.c. Compute SSE, SST, and SSR.d. Compute the coefficient of determination r2. Comment on the goodness of fit.e. Compute the correlation coefficient.f. Compute the mean square error MSE.g. Compute the standard error of the estimate.h. Compute the estimated standard deviation of b1.i. Use the t test to test the following hypothesis β1 = 0 at α = 0.05.j. Develop a 95% confidence interval estimate for β1 to test the hypothesis β1 = 0.k. Use the F test to test the hypothesis β1 = 0 at a 0.05 level of significance.l. Develop a 95% confidence interval estimate of the mean number of sheets of paper used when 38 mortgages are originated.m. Develop a 95% prediction interval estimate for the number of sheets of paper used when 38 mortgages are originated.

A marketing firm is developing a new television advertisement for a large discount retail chain. A sample of 30 people is shown two potential ads and asked their preference. The results for ad #1 follow. Use Excel to develop a 95% confidence interval estimate of the proportion of people in the population who will prefer ad #1. Prefer Advertisement #1 yesnonoyesyesno nononoyesnoyes nonoyesyesyesno yesyesnononoyes yesnoyesyesnono