A camera has a listed price of $615.99 before tax. If the sales tax rate is 9.25%, find the total cost of the camera with sales
2 answers:
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Answer:
The p value is higher than any significance level given for example , so then we can conclude that we FAIL to reject the null hypothesis. So we don't have enough evidence to conclude that the mean reading is greater for the auscultatory method at 5% or 10% of significance.
Step-by-step explanation:
A paired t-test is used to compare two population means where you have two samples in which observations in one sample can be paired with observations in the other sample. For example if we have Before-and-after observations we can use it.
Let put some notation
x=Auscultatory method , y = Oscillatory method
x: 74 86 84 79 70 78 79 70
y: 70 85 90 110 71 80 69 74
The system of hypothesis for this case are:
Null hypothesis:
Alternative hypothesis:
The first step is define the difference , that is given so we have:
d: 6.6, 4.2, -5.5, -3.1, 9.3, -3.9
The second step is calculate the mean difference
The third step would be calculate the standard deviation for the differences, and we got:
The fourth step is calculate the statistic given by :
The next step is calculate the degrees of freedom given by:
Now we can calculate the p value, since we have a right tailed test the p value is given by:
The p value is higher than any significance level given for example , so then we can conclude that we FAIL to reject the null hypothesis. So we don't have enough evidence to conclude that the mean reading is greater for the auscultatory method at 5% or 10% of significance.
Answer:
The fraction of all the shapes are circles is
Step-by-step explanation:
There are two types of the shapes in a game.
Circle
Square
The ratio of number of white shapes to the number of black shapes is 5 : 11.
Consider there are 50 white shapes and 110 black shapes.
The ratio of the number of white circles to the number of white squares is 3 : 7.
Here 3/10 of the white shapes are circle and 7/10 are white squares.
The number of white circles can be obtained as follows,
White circles = 3/10 × 50
= 50
The number of white squares can be obtained as follows,
White squares = 7/10 × 50
= 35
The number of black circles to the number of black squares is 3/8.
The number of black circles can be obtained as follows,
Black circles = 3/11 × 110
= 30
The number of black squares can be obtained as follows,
Black squares = 8/11 × 110
= 80
The total number of circles is 30 + 15 = 45 and the total number of shapes is 50 + 110 = 160.
The fractions of all the shapes are circles are 45/160 which is simplified to 9/32
The fraction of all the shapes are circles is 9/32
