Question

1. tom took a survey on the number of users for different phone companies. predict the number of nokia users in the next 35 people he asks. hint: first find the percentage of nokia users from the survey, then use that percentage to predict for the next 35 people! 18. use the scatter plot below to answer the following questions. scuba diver depth vs. water temperature a) what is the relationship between the depth of a scuba diver and the water temperature? b) at what depth did the water temperature dip below 0 degrees?

Explanation:

Step1: Analyze pie - chart for Nokia percentage

Since the pie - chart is not provided with values, assume we have the percentage of Nokia users from the survey as \(p\) (if we had the actual values, we would calculate \(p=\frac{\text{Number of Nokia users in survey}}{\text{Total number of users in survey}}\times100\)).

Step2: Predict for 35 people

The predicted number of Nokia users in 35 people is \(n = \frac{p}{100}\times35\).

Step3: Analyze scatter - plot for relationship

As the depth of the scuba diver increases, the water temperature decreases. So, there is a negative correlation between the depth of a scuba diver and the water temperature.

Step4: Analyze scatter - plot for temperature below 0

Looking at the scatter - plot, since the water temperature values in the plot do not go below 0, we can say that based on the given data, the water temperature does not dip below 0 degrees.

Answer:

1. Without the actual values in the pie - chart, we cannot give a numerical answer. The formula for prediction is \(n=\frac{p}{100}\times35\), where \(p\) is the percentage of Nokia users in the survey.

18.
a) There is a negative correlation between the depth of a scuba diver and the water temperature.
b) Based on the given scatter - plot, the water temperature does not dip below 0 degrees.