Answer:
Step-by-step explanation:
<u>Step 1: Subtract 15 from both sides
</u>
<u>Step 2: Divide both sides by -9
</u>
Since you divided by a negative, you must flip the sign.
Answer:
Answer:
Pay attention in class and u would understand,✌️
Answer: 0.5467
Step-by-step explanation:
We assume that the test scores for adults are normally distributed with
Mean :
Standard deviation :
Sample size : = 50
Let x be the random variable that represents the IQ test scores for adults.
Z-score :
For x =85
For x =115
By using standard normal distribution table , the probability the mean of the sample is between 95 and 105 :-
Hence, the probability that a randomly selected adult has an IQ between 85 and 115 =0.5467