# Statistics HW Help?

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• 1 month ago

QUESTION 7

For which dataset we can't plot a density curve?

dataset of 1000 people, for each person we have data on the number of minutes they spent in the library

We have survey data on 1000 customers, each stating their level of satisfaction with the bank service from strongly dissatisfied to strongly satisfied

We have data on the temperature of College Park for every day since the past 10 years

QUESTION 8

A startup company wants to filter applicants based on several criteria, one of them being GRE quantitative score. Suppose GRE scores are well-approximated by a Gaussian distribution, with mean 150 and standard deviation 8.

The manager has asked the employee in charge of reviewing the applications to only keep applications with GRE score above than 166.

In the process, the employee finds some applications which have submitted GMAT score instead of GRE and asks the manager what to do with them. The manager, in haste, says "just select those with equivalently high scores".

GMAT scores are well-approximated by a Normal distribution with mean 550 and standard deviation 110.

Which threshold should the employee consider for GMAT scores? That is, applicants with GMAT score above what value should be kept?

650

770

685

610

725

QUESTION 9

In a standard Normal distribution, what percentage of datapoints have value less than 1.96?

68

34

95

97.5

2.5

5

16

• 1 month ago