hich statement is correct? Group of answer choices There is no overlap between the 95% confidence interval for the proportion of successes of groups 2 and 3. There is no overlap between the 95% confidence interval for the proportion of successes of groups 1 and 2. There is an overlap between the 95% confidence interval for the proportion of successes of groups 1 and 2. There is an overlap between the 95% confidence interval for the proportion of successes of groups 1 and 3.
Your cognitive capacity is significantly reduced when your smartphone is within reach, even if it’s off.
A professor conducted experiments with nearly 600 smartphone users in an attempt to measure how well people can complete tasks when they have their smartphones nearby even when they’re not using them.
In one experiment, the researchers asked study participants to sit at a computer and perform a task that required full concentration in order to succeed. The tests were geared to measure participants’ available cognitive capacity – that is, the brain’s ability to hold and process data at any given time. Before beginning, participants were randomly instructed to place their smartphones either on the desk face down (group 1; 200 participants), in their pockets (group 2; 200 participants), or in another room (group 3; 200 participants). All participants were instructed to turn their phones to silent.
The researchers found that participants with their phones in another room significantly outperformed those with their phones on the desk, and they also slightly outperformed those participants who had kept their phones in the pocket.
Here are the results from the experiment:
| Group 1 | Group 2 | Group 3 | |
| Successful tasks | 90 | 130 | 150 |
Which statement is correct?
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