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nekit [7.7K]
2 years ago
12

A sample of 716 adolescent girls from a particular health authority participated in a study of the relationship between systolic

blood pressure (SBP) and resting heart rate (RHR). Measurements of SBP (in mm Hg) and RHR (in beats/min.) were taken on each girl. You may assume that the SBP measurements are independent and normally distributed with common SD. The data are available here:
"RHR" "SBP"
73.9 166
77.6 166
97.2 188
80.9 172
81.5 167
99 182
85.2 177
66.2 150
72.5 162
75.2 165
93.6 185
84.1 174
84.5 171
81.3 174
74 170
99.8 192
85.6 167
58.5 153
87.8 177
74.9 166
68.4 160
77.7 167
68.8 158
72.1 165
73.2 165
61.5 155
89.3 188
81.8 174
67.6 158
1) Write down the linear regression model for these data. Be sure to define your variables and to state all assumptions.
2) Conduct the test of whether mean SBP is positively associated with RHR. In particular: Specify the null and alternative hypotheses, the value of the test statistic, the p-value and using a significance level of = 0.05, state your conclusions in the language of the problem.
3) Provide a 90% confidence interval for the mean SBP of girls with a RHR of 100 beats/min AND a 90% prediction interval for the SBP of a girl with a RHR of 100 beats/min.
4) Given an intuitive (not mathematical) explanation as to why your interval in (f) is so much wider than your interval in (e).
Mathematics
1 answer:
Setler [38]2 years ago
8 0
A lot of reading don’t you think
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iogann1982 [59]
Answer: $156.86

Step by Step:

136.40 x .15 = 20.46

136.40 + 20.46 = 156.86
3 0
2 years ago
What is the slope of the line that passes through the points (8,2) and (10,2)? Write your answer in the simplest form.​
Oxana [17]

slope of line=(y2-y1)/(x2-x1)

give is

(x1,y1)=(8,2)

(x2,y2)=(10,2)

therefore slope =(2-2)/(10-8)=0/2=0

Hence

answer

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3 0
1 year ago
Fill in the missing numbers to create equivalent ratios.
jasenka [17]

Step-by-step explanation:

The way to find missing numbers in equivalent ratios is to multiply the means (the first denominator and the second numerator) and multiply the extremes (the first numerator and the second denominator). It sounds really complicated, but it is quite simple =)

2/5 = x/10

The means in this equivalent ration are 5 and x. The extremes are 2 and 10.

5x = 20

Now solve =)

x = 4

That was pretty simple. Let's move on to the next one. Do exactly the same thing here:

4/10 = 6/x

60 = 4x

15 = x

That was pretty simple, too! Keep going!

6/15 = x/25

15x = 150

x = 10

All of these should be equal, so check them by dividing:

2/5 = 0.4

4/10 = 0.4

6/15 = 0.4

10/25 = 0.4

They all check out, so these are your answers: 2/5, 4/10, 6/15, 10/25


I really hope this helps you =)

8 0
3 years ago
Read 2 more answers
3.57 x 10 <br> write in standard form
Bess [88]

\huge\text{Hey there!}

\textsf{3.57}\times\textsf{10}^\mathsf{3}\\\\\mathsf{10^3}\\\mathsf{\rightarrow 10\times10\times10}\\\mathsf{\rightarrow100\times10}\\\mathsf{\rightarrow 1,000}\\\\\textsf{3.57}\times\textsf{1,000}\\\rightarrow\textsf{3,570}\\\rightarrow\mathsf{3.57\times10^3}\\\\\huge\boxed{Answer: {\frak{3.57\times 10^3}}}\huge\checkmark

\huge\text{Good luck on your assignment \& enjoy your day!}

~\frak{Amphitrite1040:)}

7 0
2 years ago
a store marks up the merchandise it sells by 40%. If the regular price of the item WAS $25 how much is the store selling it for.
devlian [24]
So if the regular price of an item is 25 and the store is marking it up by 40%, then we have to multiply 25 by .4 to find out what 40% of 25 dollars is. 40% of 25 is 10 dollars. So now you just do 25 + 10 and you get 35. Answer: $35
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3 years ago
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