A study included data on the colors for a sample of new cars sold in North America. They reported that 25% of the cars in the sample were white, 21% were black, 14% were gray, 11% were silver, 10% were red, and 19% were some other color. Suppose that these percentages were based on a random sample of 1,200 new cars sold in North America. Required:
a. Is there convincing evidence that the proportions of new cars sold are not the same for all six of the color categories?
b. Calculate the test statistic
c. What is the P-value for this test?

27

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

pi x^2

step-by-step explanation:

pi times x squared