Amarketing firm is studying consumer preferences for winter fashions in four different months. from a population of women 18-21 years of age, a random sample of 100 women was selected in january. another random sample of 100 women was selected in march. another random sample of 100 women was selected in june. another random sample of 100 women was selected in september. what is the number of samples?

There were total 4 samples collected and each sample had a sample size of n = 100.

Step-by-step explanation:

We are given the following information in the question:

Collection of samples:

Hence, there were total 4 samples collected and each sample had a sample size of n = 100.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)