## 1⁄2Calculate the variance of this sampling distribution.a) 37.6b) 2948.3c) 1410

1⁄2Calculate the variance of this sampling distribution.a) 37.6b) 2948.3c) 1410.2d) 65.7e) 470.1f) None of the above10)Suppose you want to play a carnival game that costs 5 dollars each time you play. If you win, you get \$100. The probability of winning is 3⁄100. What is the expected…

## 11. A shoe store record shows that of all customers making a purchase, 20% use

11. A shoe store record shows that of all customers making a purchase, 20% use a credit card to make payment. This morning 15 customers purchased shoes from the store. 14 Let the random variable X denote the number of…

## 5. A computer saves a block of data onto a blank CD. When a zero is written, th

5. A computer saves a block of data onto a blank CD. When a zero is written, the reflective medium is left unchanged. However, to write a one, maximum laser power is employed toheat the material and make it lose…

## 44 53 47 50 36 49 54 40 52 48 49 39 60 46 48 43 57 47 51 45 Mean of X = 58.75 S

44 53 47 50 36 49 54 40 52 48 49 39 60 46 48 43 57 47 51 45 Mean of X = 58.75 S.D. of X = 5.64 Mean of Y = 47.9 S.D of Y = 5.9…

## A college student is planning to apply for a school grant. A friend of hers who

A college student is planning to apply for a school grant. A friend of hers who works for the company that is offering the grant has told her that if she takes calculus in her freshman year and gets an…

## Two types of plastic are suitable for use by an electronic calculator manufactu

Two types of plastic are suitable for use by an electronic calculator manufacturer. The breaking strength of this plastic is important. It is known that V1= V2= 1.0 psi. From random samples of n1= 10and n2= 12 we obtain y1=…

## There are 40 students in an elementary statistics claSs. On he baSis of years o

There are 40 students in an elementary statistics claSs. On he baSis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of…

## (a) We would like to estimate the difference between the true mean driving spee

(a) We would like to estimate the difference between the true mean driving speeds of teenagers and seniors.  We measure the speeds (in km/h) of a random sample of 20 teenage drivers and 15 senior drivers and calculate a 95% confidence…

## As a marketing associate for a sports apparel company, we see that, in 2011,

As a marketing associate for a sports apparel company, we see that, in 2011, 44.2% of our customers checked reviews of our new products on social media sites before buying.  This year, to see if that percentage has increased, we…

## 19. A blood test is developed to screen for a certain type of allergy in human

19. A blood test is developed to screen for a certain type of allergy in human beings. Individuals who have the allergy tend to have elevated serum concentration of the allergen-specific antibody. In particular, among these allergic individuals, their allergen-specific antibody…