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If r(exercise/weight) = -0.87, the statement which is NOT true is:
The obtained value is -0.87.
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Most Popular Content
10 pages
Excel Module 7.3
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below are the questions and i will attach the note if you need ---title: "Question 1"---
```{r, message = FALSE}library(tidyverse)library(gapminder)# use ?gapminder get the desciption of the dataset `gapminder````
Consider the dataset `gapminder`.
##### (a) Modify the `continent` factor by classifying the Americas' countries into `South America` and `North America` Hint: the following countries are in South America. ```r c("Argentina", "Bolivia", "Brazil", "Chile", "Colombia", "Ecuador", "Paraguay", "Peru", "Trinidad and Tobago", "Uruguay", "Venezuela") ```
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Hint: you could use `case_when` function.
##### (b) How many countries are there in the dataset? How about for each continent?
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##### (d) For each continent, which country experienced the sharpest increment rate in life expectancy from 1997 to 2007?
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```{r, message = FALSE}library(nycflights13)library(tidyverse)```
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##### (b) Sort part (a) descedingly by the column you just created. Store the result as `flights_gain`.
##### (c) On average, did flights gain or lose time? (Hint: not average gain, but as percentage of positive gain.)
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The table shows the prices of different items in 4 different stores.
##### (b) Is the data frame in wide format or long format?
##### (c) Try to convert it into the other format. Store it as `groceries2`.
##### (d) Use a randomized block design to analysis the store prices. Is there a store marking up the item prices?
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