An automobile tyre manufacturer is comparing the tread life of its new tyres to the tread life of its previous model to see if they last significantly longer.
The values below are in thousands of kilometres.
• New Tyre: 130, 135, 125, 137, 128, 131, 140
• Old Tyre: 131, 132, 127, 129, 128, 134, 132
Perform a hypothesis test to determine if the new tyres lasted significantly longer than
the old tyres with a 0.05 level of significance.

Each pizza must be divided into 6 parts.   TRUE

Mario can feed 12 friends with 4 pizzas.  TRUE

Step-by-step explanation:

Total number of pizzas Mario has  = 4

Now the fraction of pizza eaten by 1 friend  = 2/6 = 1/3

⇒ 1 friend eats of pizza.

So, the fraction if pizza eaten by his 3 friends  = 3 x Fraction his 1 friend eats)

Hence, his 3 friends eats 1 complete pizza.

Now, he has a total of 4 pizzas.

So, the number of friends to finish 4 pizza  

= 4 x ( Number of people to finish 1 pizza) = 4 x 2  = 12 friends

Hence, his 12 friends eat 4 complete pizza.

Now, the given statements are:

Each pizza must be divided into 4 parts.

False as 3 is NOT divisible by 4

Each pizza must be divided into 6 parts.   TRUE

Mario can feed 12 friends with 4 pizzas.  TRUE

Mario can feed 24 friends with 4 pizzas. FALSE