Answer:
He caught 392 fish last month.
Step-by-step explanation:
If you do how many fish (28) he caught each time multiplied by how many times, you get 14. So do 14x28=392 fish last month.
Well, percent (%) means per hundred, and your number is 6. Therefore, you have 6 per hundred, or 6/100. Also, when you have a percent and want to convert it into a fraction, you must divide the percent by 100, so you could just put the six over 100 since the line between the numerator and denominator basically means division.
Answer:
a) There is no enough evidence of an increase in life expectancy.
b) P-value=0.07.
The P-value indicates that this sample result is not rare to happen (is greater than the significance level) even if the mean of the population is still 87 hours.
Step-by-step explanation:
We have to perform a hypothesis test on the mean, with known standard deviation of the population.
The null hypothesis, which we will reject or not, states that the life expectancy has not increase (it stays equal or less than 87 hours).
The null and alternative hypothesis are
The significance level is α=0.01.
The z-value is
The P-value for z is
The P-value (0.07) is greater than the significance level (0.01), so the effect is not significant. We fail to reject the null hypothesis.
There is no enough evidence of an increase in life expectancy.
Answer:
c. 7.25
Step-by-step explanation:
Given the following information from an experiment:
Total Sample Size =5+10+5=20
Therefore, the overall mean