Download presentation

Presentation is loading. Please wait.

Published byAriana Hansen Modified over 4 years ago

1
60, 70, 78, 88, 88, 88, 93, 96 ________ Med = ___________ Mode = _________ Range = _________ __________ Warm-up

2
7.4 Normal Distributions

4
Z - Scores

5
EXAMPLE 3 Use a z-score and the standard normal table Scientists conducted aerial surveys of a seal sanctuary and recorded the number x of seals they observed during each survey. The numbers of seals observed were normally distributed with a mean of 73 seals and a standard deviation of 14.1 seals. Find the probability that at most 50 seals were observed during a survey. Biology P(x < 50) = P(z < – 1.6) =

6
EXAMPLE 3 Use a z-score and the standard normal table Page 296

7
GUIDED PRACTICE for Example 3 8. WHAT IF? In Example 3, find the probability that at most 90 seals were observed during a survey. 0.8849 ANSWER

8
GUIDED PRACTICE for Example 3 9. REASONING: Explain why it makes sense that P(z < 0) = 0.5. A z- score of 0 indicates that the z- score and the mean are the same. Therefore, the area under the normal curve is divided into two equal parts with the mean and the z- score being equal to 0.5. ANSWER

9
Daily Homework Quiz For use after Lesson 11.3 0.025 ANSWER 1. A normal distribution has mean x and standard deviation. For a randomly selected x -value from the distribution, find P(x x – 2 ).

10
2. The average donation during a fund drive was $75. The donations were normally distributed with a standard deviation of $15. Use a standard normal table to find the probability that a donation is at least $115. ANSWER 0.35 % or 0.0035

Similar presentations

Presentation is loading. Please wait....

OK

Mean Absolute Deviation

Mean Absolute Deviation

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on you can win the race Ppt on cse related topics in biology Ppt on condition monitoring devices Ppt on agriculture in india Ppt on tcp/ip protocol suite protocols Ppt on power generation by speed breaker pump Ppt on principles of peace building Ppt on ufo and aliens today Ppt on kingdom monera phylum Ppt on corporate social responsibility under companies act 2013