# statistics

A coin mint has a specification that a particular coin has a mean weight of 2.5 g. A sample of 39 coins was collected. Those coins have a mean weight of 2.49491 g and a standard deviation of 0.01372 g. Use a 0.05 significance level to test the claim that this sample is from a population with a mean weight equal to 2.5 g. Do coins appear to conform to the specifications of the coin mint?

1. 👍 0
2. 👎 0
3. 👁 585
1. Z = (score-mean)/SEm

SEm = SD/√n

Use Z table, as indicated in previous posts.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### MATH

24 1c coins are set out in a row on a table. Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is

asked by BRENDON on January 26, 2010
2. ### MATHS

24 1c coins are set out in a row on a table Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is

asked by LARA on November 19, 2013
3. ### physics

Ten ,one rupees coin are put on the top of at each other on a table each coin has a mass 'm' give the magnitudes and direction of - 1. The force of seventh coin (counted from bottom) due to all the coins. 2. The reaction of 6th

asked by nayan on October 14, 2014
4. ### PHYSICS!

A 3.0 g coin moving to the right at 27.0 cm/s makes an elastic head-on collision with a 20.0 g coin that is initially at rest. After the collision, the 3.0 g coin moves to the left at 12.5 cm/s. (b) Find the amount of kinetic

asked by Sara on January 7, 2015
5. ### physics

Ten , one rupees coin are put on the top at of each other on a table. Each coin has a mass 'm'. Give the magnitude and direction of - (1)- The force of 7th coin (counted from bottom) due to all coins on its top. (2)- The force of

asked by me on October 14, 2014
1. ### MATH

A BAG CONTAINS COIN OF RS.5&RS.2. THE TOTAL VALUE OF THESE COIN IS 1272.IF THE NO. OF 2 RS. COIN IS 15% OF THE 5 RS. COIN, FIND THE NO. OF COIN EACH.

asked by MALIKA on June 28, 2015
2. ### Physics

A 5.3 g coin sliding to the right at 26.8 cm/s makes an elastic head-on collision with a 15.9 g coin that is initially at rest. After the collision, the 5.3 g coin moves to the left at 13.4 cm/s. (a) Find the final velocity of the

asked by Karrie on October 29, 2014
3. ### Physics

A 5.6 g coin sliding to the right at 22.6 cm/s makes an elastic head-on collision with a 16.8 g coin that is initially at rest. After the collision, the 5.6 g coin moves to the left at 11.3 cm/s. (a) Find the final velocity of the

asked by Anonymous on December 12, 2014
4. ### physics HELP!

A 4.0 g coin sliding to the right at 26.0 cm/s makes an elastic head-on collision with a 12.0 g coin that is initially at rest. After the collision, the 4.0 g coin moves to the left at 13 cm/s. (a) Find the final velocity of the

asked by Najah on December 12, 2013
5. ### Momentum

A 6.0 g coin moving to the right at 21.0 cm/s makes an elastic head-on collision with a 20.0 g coin that is initially at rest. After the collision, the 6.0 g coin moves to the left at 12.5 cm/s. a.) Find the final velocity of the

asked by Lui on May 16, 2012

More Similar Questions