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2 years ago

12

The price of stock increased by 2/3 cent Monday morning. On Monday Afternoon it decreased by 5/6 cent. On Tuesday mornin,the pri

ce increased by 3/4 cent. What is the overall change in stock price?
A(7/12.
b(-7/12
c 10/12
b 10/13

1 answer:

tresset_1 [31]2 years ago

6 0

Answer:

7/12

Step-by-step explanation:

$\frac{2}{3}$ + (- $\frac{5}{6}$ ) + $\frac{3}{4}$ = $\frac{8}{12}$ + (- $\frac{10}{12}$ ) + $\frac{9}{12}$ = - $\frac{2}{12}$ + $\frac{9}{12}$ = $\frac{7}{12}$

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It’s 55778 Ann’s slide it’s 5

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3 years ago

One year Ron had the lowest ERA (earned-run average, mean number of runs yielded per nine innings pitched)

Arada [10]

Answer:

Ron's ERA has a z-score of -2.03.

Karla's ERA has a z-score of -1.86.

Due to the lower z-score, Ron had a better yean than Karla relative to their peers.

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

Since the lower the ERA, the better the pitcher, whoever's ERA has the lower z-score had the better year relative to their peers.

Ron

ERA of 3.06, so $X = 3.06$

For the males, the mean ERA was 5.086 and the standard deviation was 0.998. This means that $\mu = 5.086, \sigma = 0.998$

So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{3.06 - 5.086}{0.998}$

$Z = -2.03$

Ron's ERA has a z-score of -2.03.

Karla

ERA of 3.28, so $X = 3.28$

For the females, the mean ERA was 4.316 and the standard deviation was 0.558. This means that $\mu = 4.316, \sigma = 0.558$

So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{3.28 - 4.316}{0.558}$

$Z = -1.86$

Karla's ERA has a z-score of -1.86.

Which player had the better year relative to their peers, Ron or Karla?

Due to the lower z-score, Ron had a better yean than Karla relative to their peers.

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3 years ago

An airline knows that 5 percent of the people making reservations on a certain flight will not show up. Consequently, their poli

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Answer:

the probability that there will be a seat available for every passenger who shows up is 0.74

Step-by-step explanation:

if the probability of choosing a passenger that will not show up is 5% , then the probability of choosing a passenger that will show up is 95%.

Denoting event X= x passengers will show up from the total of 52 that purchased the ticket

Then P(X) follows a binomial probability distribution, since each passenger is independent from others. Thus

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3 years ago

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2 years ago

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3 years ago

Read 2 more answers