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2 years ago

Frederick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin.

Mathematics

2 answers:

belka [17]2 years ago

5 0

Answer:

the statements given above are true.

Step-by-step explanation:

Given that Frederick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin.

He spun a 4 five times.

The statements true are:

i) For the experimental outcomes to be closer to the predicted outcome, the number of trials should be increased.

iii) If the number of trials is changed, the experimental probability also changes.

iv) If the number of trials is changed, the predicted number of outcomes also changes.

v) If the number of trials is changed, the number of experimental outcomes also changes.

kotykmax [81]2 years ago

4 0

Answer:

For the experimental outcomes to be closer to the predicted outcome, the number of trials should be increased.; If the number of trials is changed, the experimental probability also changes. ; If the number of trials is changed, the predicted number of outcomes also changes. ; and If the number of trials is changed, the number of experimental outcomes also changes.

Explanation:

The more trials you perform, the closer your experimental probability will be to the theoretical probability. Thus the first statement is true and the second statement is false.

As the number of trials increases, the experimental probability changes; this is because for each trial, you will possibly have a different outcome. Thus the third statement is true.

As the number of trials increases, the predicted number of outcomes changes. This is because the predicted number will change to keep the ratio of predicted outcomes to number of trials the same. Thus the fourth statement is true.

As the number of trials increases, the number of experimental outcomes changes. This is because, as with number three, for each trial, you will possibly have a different outcome. Thus the fifth statement is true.

We cannot change the theoretical probability by performing an experiment. Thus the sixth statement is false.

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A turtle walks 7/8 of a mile in 50 minutes. What is the unit rate when the turtle’s speed is expressed in miles per hour?

yKpoI14uk [10]

Answer:

21/20

Step-by-step explanation:

a) One hour is equivalent to 60 minutes.

So we can multiply 50 minutes by the fraction $\frac{1 hour}{60 minutes}$ , so we could convert 50 minutes to hours.

It is:

$50 minutes * \frac{1 hour}{60 minutes}=\frac{50}{60}hours$

If we simplify the fraction, we have:

$50 minutes = \frac{5}{6}hours$

b) In order to express the turtle's speed in miles per hour, we have to divide

$\frac{7}{8}miles$ by $\frac{5}{6}hours$

So:

$\frac{\frac{7}{8}miles }{\frac{5}{6}hours }$

We simplify the expression by multiplying 7 mile by 6 and 8 by 5 hours:

$\frac{\frac{7}{8}miles }{\frac{5}{6}hours}=\frac{42 miles}{40 hours} =\frac{21 miles}{20 hours}$

4 0

2 years ago

Read 2 more answers

The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard devia

Alla [95]

Answer:

$z=5$

Step-by-step explanation:

We have been given that the The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard deviation of $4,000.

To solve our given problem we will use z-score formula.

$z=\frac{x-\mu}{\sigma}$ where,