# finding standard deviation in a normal distribution

**Question description**

A different species of cockroach has weights that follow a normal distribution with a mean of 50 grams.After measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weight more than 50 grams.Based on this report, what is the approximate standard deviation of weights for this species of cockraches?

## Tutor Answer

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors