Answer:
Step-by-step explanation: 12,061
Answer:
Yes, evidence shows that the cream will improve the skin of more than 40% of women over the age of 50 in 0.01 significance level.
Step-by-step explanation:
We need to make a hypothesis test.
Let p be the proportion of women who used cream report skin improvement.
: p=0.4
: p<0.4
To test the hypothesis, we need to calculate z-score of the sample mean and compare its probability with the significance level.
z= where
- p(s) is the sample proportion of women reported improvement (0.5)
- p is the proportion assumed under null hypothesis. (0.4)
- N is the sample size (70)
Putting the numbers:
z= ≈ 1.71
And P(z<1.71) ≈ 0.955. Since 0.955>0.01 we fail to reject the null hypothesis that the cream will improve the skin of more than 40% of women.
Answer:
12.5
Step-by-step explanation:
put them in order from least to greatest: 11, 11, 12, 12, 12, 13, 13, 14, 15, 16
the middle is 12 and 13 so you do 12+13 then divide by 2
to get 12.5
hope this helps
Answer:
4.47 Miles
Step-by-step explanation:
To be able to find distance between Sarah and Malia's house, we need to use the distance formula between the two points.
We have now define the points of both Sarah and Malia's house.
Sarah's House = (5, 2)
Milia's House = (3, -2)
We then substitute the values in the distance formula with the points given.
d = 4.47 miles
$1.80
3.99 x 0.04 = 1.79
and you get 1.80 when you round it