karim sent a chain email to 10 of his friends. the number of people who got the email increases by a factor of 1.4 every week. w
1 answer:
Answer:
Step-by-step explanation:
The number of people who receive the email after t weeks can be modeled by the following equation.
In which P(0) is the initial number of poeple who received the email and r is the factor.
Karim sent a chain email to 10 of his friends.
This means that
The number of people who got the email increases by a factor of 1.4 every week.
This means that
So
Which expression gives the number of people who got the email after 6 weeks?
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Answer:
Null and alternative hypothesis
Test statistic
P-value
The null hypothesis is rejected.
It is concluded that the proportion of households tuned into the program is less than 25%. The claim of the advertiser is rigth and got statistical support.
Step-by-step explanation:
We have to perform a hypothesis test of a proportion.
The claim is that less than 25% were tuned into the program, so we will state this null and alternative hypothesis:
The signifiance level is 0.01.
The sample has a proportion p=0.1 and sample size of n=6000.
The standard deviation of the proportion, needed to calculate the test statistic, is:
The test statistic is calculated as:
As this is a one-tailed test, the P-value is P(z<-26.82)=0. The P-value is smaller than the significance level (0.01), so the effect is significant.
Since the effect is significant, the null hypothesis is rejected. It is concluded that the proportion of households tuned into the program is less than 25%. The claim of the advertiser is rigth and got statistical support.