1a fourth grade teacher gives homework every night in both

Reference no: EM13353623

1. A fourth grade teacher gives homework every night in both mathematics and language arts. The time to complete the mathematics homework has a mean of 10 minutes and a standard deviation of 3 minutes. The time to complete the language arts assignment has a mean of 12 minutes and a standard deviation of 4 minutes. The time to complete the mathematics and the time to complete the language arts homework has a correlation ρ = -0.75. The standard deviation of the time to complete the entire homework assignment is
A. 25 minutes.
B. 5 minutes.
C. 3 minutes.

2. I toss a thumbtack 60 times and it lands point up on 35 of the tosses. The approximate probability of landing point up is
A. 35.
B. 0.35.
C. 0.58.

3. A game consists of drawing three cards at random from a deck of playing cards. You win $3 for each red card that is drawn. It costs $2 to play. For one play of this game, the sample space S for the net amount you win (after deducting the cost of play) is

A. S = {$0, $1, $2, $3}
B. S = {$0, $3, $6, $9}
C. S = {-$2, $1, $4, $7}

Reference no: EM13353623

Questions Cloud

1suppose we toss a penny and a nickel let a be the event : 1.suppose we toss a penny and a nickel. let a be the event that the penny is a head and b be the event that the nickel

1suppose we have a loaded die which gives the outcomes 1 : 1.suppose we have a loaded die which gives the outcomes 1 through 6 according to the probability distributionnbspnote

1students at university x must be in one of the class ranks : 1.students at university x must be in one of the class ranks freshman sophomore junior or senior. at university x 35 of

1in a particular game a ball is randomly chosen from a box : 1.in a particular game a ball is randomly chosen from a box that contains 3 red balls 1 green ball and 6 blue balls. if

1a fourth grade teacher gives homework every night in both : 1.a fourth grade teacher gives homework every night in both mathematics and language arts. the time to complete the

1a plumbing contractor puts in bids on two large jobs let : 1.a plumbing contractor puts in bids on two large jobs. let the event that the contractor wins the first contract be a

1two coins are tossed and the total number of heads is : 1.two coins are tossed and the total number of heads is counted. which of the following would be a legitimate

1suppose x is a continuous random variable taking values : 1.suppose x is a continuous random variable taking values between 0 and 1 and having a probability distribution

1a college basketball player makes 80 of his free throws at : 1.a college basketball player makes 80 of his free throws. at the beginning of a game he misses his first two free

User Account

All Pages