Globokim8
2021-06-04
Answered

Draw two scatterplots with positive linear associations but different strengths.

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Roosevelt Houghton

Answered 2021-06-05
Author has **106** answers

We need to draw two different scatterplot that both have a positive association but have different strengths.

Let us draw a scatterplot with a strong, positive, linear relationship (points do not vary very much from general pattern) and let us draw a scatterplot with a moderately, positive, curved relationship (points very quite a bit from the general pattern).

The two relationship then have different strengths as one is strong and another is weak.

Let us draw a scatterplot with a strong, positive, linear relationship (points do not vary very much from general pattern) and let us draw a scatterplot with a moderately, positive, curved relationship (points very quite a bit from the general pattern).

The two relationship then have different strengths as one is strong and another is weak.

asked 2021-03-02

1) In what way is the point unusual? Does it have high leverage, a large residual, or both?

2) Do you think that point is an influential point?

3) If that point were removed, would the correlation be- come stronger or weaker? Explain.

4) If that point were removed, would the slope of the re- gression line increase or decrease? Explain

asked 2021-12-11

The Truly Amazing Dudes are a group of comic acrobats. The weights (in pounds) of the ten acrobats are as follows.

146 192 174 177 159 87 178 152 144 148

(a) Find the mean and sample standard deviation of the weights. (Round your answers to one decimal place.)

mean 155.7 lbs

standard deviation ? lbs

(b) What percent of the data lies within one standard deviation of the mean? %

(c) What percent of the data lies within two standard deviations of the mean? %

146 192 174 177 159 87 178 152 144 148

(a) Find the mean and sample standard deviation of the weights. (Round your answers to one decimal place.)

mean 155.7 lbs

standard deviation ? lbs

(b) What percent of the data lies within one standard deviation of the mean? %

(c) What percent of the data lies within two standard deviations of the mean? %

asked 2020-11-29

State whether the investigation in question is an observational study or a designed experiment. Justify your answer in each case.

The Salk Vaccine. In the 1940s and early 1950s, the public was greatly concerned about polio. In an attempt to prevent this disease, Jonas Salk of the University of Pittsburgh developed a polio vaccine. In a test of the vaccine’s efficacy, involving nearly 2 million grade-school children, half of the children received the Salk vaccine, the other half received a placebo, in this case an injection of salt dissolved in water. Neither the children nor the doctors performing the diagnoses knew which children belonged to which group, but an evaluation center did. The center found that the incidence of polio was far less among the children inoculated with the Salk vaccine. From that information, the researchers concluded that the vaccine would be effective in preventing polio for all U.S. school children, consequently, it was made available for general use.

The Salk Vaccine. In the 1940s and early 1950s, the public was greatly concerned about polio. In an attempt to prevent this disease, Jonas Salk of the University of Pittsburgh developed a polio vaccine. In a test of the vaccine’s efficacy, involving nearly 2 million grade-school children, half of the children received the Salk vaccine, the other half received a placebo, in this case an injection of salt dissolved in water. Neither the children nor the doctors performing the diagnoses knew which children belonged to which group, but an evaluation center did. The center found that the incidence of polio was far less among the children inoculated with the Salk vaccine. From that information, the researchers concluded that the vaccine would be effective in preventing polio for all U.S. school children, consequently, it was made available for general use.

asked 2022-07-22

Use the frequency table that you constructed in question number 3 to find the percentile rank.

What is the percentile rank of Age of 45. Round up to two numbers after the decimal point in percentile rank.

$\begin{array}{|cccc|}\hline \text{Age}& \text{Frequency = f}& \text{relative Frequency = rf}& \text{Cumulative frequency =>cf}\\ 74-93& 5& (5/27)=0.185& 27\\ 54-73& 7& (7/27)=0.259& 22\\ 34-53& 5& (5/27)=0.185& 15\\ 14-33& 10& (10/27)=0.370& 10\\ \text{Total}& 27\\ \hline\end{array}$

What is the percentile rank of Age of 45. Round up to two numbers after the decimal point in percentile rank.

$\begin{array}{|cccc|}\hline \text{Age}& \text{Frequency = f}& \text{relative Frequency = rf}& \text{Cumulative frequency =>cf}\\ 74-93& 5& (5/27)=0.185& 27\\ 54-73& 7& (7/27)=0.259& 22\\ 34-53& 5& (5/27)=0.185& 15\\ 14-33& 10& (10/27)=0.370& 10\\ \text{Total}& 27\\ \hline\end{array}$

asked 2021-03-06

Make a scatterplot for the data.

Height and Weight of Females

asked 2021-12-05

A coach collected data for the same group of runners for two weeks. The median distance run for Week 1 was 14.5 miles, with an IQR of 1.15. The median distance run for Week 2 was 16 miles, with an IQR of 1.5.

Write a word or phrase from the box on the bla

to correctly compare the variability of data from Week 1 to Week 2.

mean IQR closer to farther from

The Week 2 data values tend to be 5 their median than the Week 1 data values are to their median because Week 2 has a greater 6.

Write a word or phrase from the box on the bla

to correctly compare the variability of data from Week 1 to Week 2.

mean IQR closer to farther from

The Week 2 data values tend to be 5 their median than the Week 1 data values are to their median because Week 2 has a greater 6.

asked 2021-11-28

A random sample of 25 of the 400 member of the Bigtime Theater Company is surveyed about how may plays each has acted in. Which statement below would be an appropriate inference about the data?

3,5,5,3,4,4,1,3,6,10,1,3,4,5,1,2,4,2,3,2,5,5,5,5,6

1) Most members have acted in 2 plays.

2) Most members have acted in more than 6 plays.

3) Most members have acted in between 1-4 plays.

4) The number of members who have acted in 10 plays is greater than the number of members who have acted in 1 play.

3,5,5,3,4,4,1,3,6,10,1,3,4,5,1,2,4,2,3,2,5,5,5,5,6

1) Most members have acted in 2 plays.

2) Most members have acted in more than 6 plays.

3) Most members have acted in between 1-4 plays.

4) The number of members who have acted in 10 plays is greater than the number of members who have acted in 1 play.