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Agata [3.3K]
3 years ago
14

A study of commuting times reports the travel times to work of a random sample of 20 employed adults in New York State. The mean

is x⎯⎯⎯ = 31.25 minutes and the sample standard deviation is s = 23.7 minutes. What is the standard error of the mean?
Mathematics
1 answer:
Elodia [21]3 years ago
5 0

Answer:

The standard error of the mean = 5.14 mins

Step-by-step explanation:

Number of random sample (n) = 20

Mean(X) = 31.25 mins

Standard deviation (α) = 23.7 mins

Standard error of mean =

standard deviation / √sample size

= 23.7/√20

= 23.7/4.4721

= 5.14 mins

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kogti [31]
It would be HL theorem because the triangles are at 90 deg with a right angle
5 0
3 years ago
What is the slope of the line through (-4,2) (3,-3)
photoshop1234 [79]

Answer:

-5/7

Step-by-step explanation:

Find the change between the two x values, which is seven

Find the change between the two y values, which is -5

With slopes, the y always goes over the x, making your answer -5/7

3 0
3 years ago
Maria boards boards a car at the bottom of a ferris wheel. she rides to the top and then it stops. maria tells her friends they
DaniilM [7]

Maria is wrong because they have completed 1/2.

Step-by-step explanation:

At the top of the Ferris wheel,the ride is 1/2 done. All that is left is to go down,which is the other half. Maria is wrong in saying they are 1/4 done,that is a quarter,not half.

6 0
3 years ago
Staci is attending a music festival. The ticket to the festival costs $87.96. Staci plans to purchase $30.00 t-shirts from the e
ollegr [7]
Initial cash on hand : $200.00
Ticket cost : $87.96
T-shirt cost per piece: $30.00

The first thing Staci needs to do is to deduct the cost of the ticket from her money.

$200  - 87.96 = $112.04

Stacy has the extra amount of 112.04 to purchase t-shirts. Since, each t-shirt costs $30. To know the number of shirts she can buy, she must divide the difference by 30.

$112.04 / $30 = 3.73

Based from the quotient, Stacy can buy 3 t-shirts.

$30 * 3 = $90 total cost of the tshirts.

$112.04 - 90 = $22.04

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5 0
3 years ago
Please help me!! I am struggling... I will not accept nonsense answers!
telo118 [61]

Answer:

y = 110°

Step-by-step explanation:

The inscribed angle CHF is half the measure of its intercepted arc CDF

The 3 arcs in the circle = 360°, thus

arc CDF = 360° - 160° - 60° = 140°, so

∠ CHF = 0.5 × 140° = 70°

∠ CHF and ∠ y are adjacent angles and supplementary, thus

y = 180° - 70° = 110°

6 0
3 years ago
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