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cluponka [151]
3 years ago
12

Test scores are normally distributed with a mean of 100 and a standard deviation of 15. an​ individual's iq score is found to be

90. find the​ z-score corresponding to this value.
Mathematics
1 answer:
Mnenie [13.5K]3 years ago
6 0
Z score=(data value-mean)/standard deviation
z=(90-100)/15=-0.6666666667
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Use the following frequency distribution (of SAMPLE DATA) in answering the questions: class 0-9 f=10; class 10-19 f=20; class 20
lutik1710 [3]

Answer:

1. Five classes in the frequency distribution

2.The mid point of the third class is 24.5

3.The total number of frequency is 100

4.The relative frequency of the third class is (20/100=0.2)

5. We use n-1 because we are dealing with a sample data

6. The mean is 24.5

7. The value of the standard deviation is 11

Step-by-step explanation:

See attached picture for the solutions

4 0
3 years ago
Lakima has a spinner divided into 5 equal sections that are labeled 1 though 5. She wants to compare the theoretical probability
Scrat [10]

Using probability concepts, it is found that:

  • The theoretical probability of spinning an odd number is equal to 3/5 = 0.6.
  • The experimental probability of spinning an odd number is equal to 1/2 = 0.5.
  • Therefore, the theoretical probability of spinning an odd number is greater than the experimental probability of spinning an odd number.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

A theoretical probability is calculated without considering experiments, and we have that 3 out of the 5 numbers(1,3,5) and are odd, hence the theoretical probability is given by:

pT = 3/5 = 0.6.

For an experimental probability, we consider the experiments. Of the 6 spins, 3 resulted in an odd number, hence the experimental probability is given by:

p = 3/6 = 1/2 = 0.5.

Therefore, the theoretical probability of spinning an odd number is greater than the experimental probability of spinning an odd number.

More can be learned about probabilities at brainly.com/question/14398287

#SPJ1

3 0
2 years ago
All Five of these Questions = 90 Points. Need done ASAP.
vichka [17]

Answer:

ma ma ھگدفسخ टगाई samje ke hamreبھا मे

hoho gana ga

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3 years ago
If you bisect an angle that is 128 degrees, what size are the two new angles?
alina1380 [7]

Answer:

64 is the answer

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5 0
2 years ago
Read 2 more answers
A new price of an item is $39.32. The percent increase was 16%. What was the original price?
Fiesta28 [93]

Answer:

let x =the original price

then 116x/100=$39.32

116x=100×39.32

116x=3932

divide both sides by 116

116x/116=3932/116

x=33.89655

(2dp)

x=33.90

4 0
3 years ago
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