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Bumek [7]
3 years ago
14

Use the given minimum and maximum data​ entries, and the number of​ classes, to find the class​ width, the lower class​ limits,

and the upper class limits. minimumequals8​, maximumequals82​, 6 classes
Mathematics
1 answer:
Georgia [21]3 years ago
7 0

Answer:

Step-by-step explanation:

Given that minimum is 8 and maximum equals 82

Range = 84-8 = 76

No of classes =6

Class width = 76/6 ~13

But not given whether variable is discrete or continuous.

If discrete, we have classes as

8-20, 21-33, 34-46, 47-59, 60-72, 73-85

If continuous, we have classes as

8 to <21

21 to <34

and ... ending 73-<86

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What is the rise and the run please help
Arada [10]

Answer:

-1

Step-by-step explanation:

Rise=2

Run=-2

2/-2=

-1

4 0
2 years ago
A bank manager wanted to​ double-check her claim that recent process improvements have reduced customer wait times to an average
mojhsa [17]

Answer:

the manager claim is therefore rejected.

Step-by-step explanation:

To ascertain the manager claim, we use the normal distribution curve.

z= (x − x')/ σ

, where

z is called the normal standard variate,

x is  the value of the variable, =2.9

x' is the mean value of  the distribution =3.3

σ is the standard deviation  of the distribution= 0.8

so, z= (2.9 − 3.3)/ 0.8 = -0.5

Using  a table of normal distribution to check the partial areas beneath the standardized  normal curve,  a z-value of −0.5  corresponds to an area of 0.1915 between the mean  value.The negative  z-value shows that it lies to the left of the z=0  ordinate.

The total area under the standardized normal curve  is unity and since the curve is symmetrical, it follows  that the total area to the left of the z=0 ordinate is  0.5000. Thus the area to the left of the z=−0.5 ordinate is 0.5000−0.1915 = 0.3085 of the  total area of the curve.

therefore, the probability of the average wait time greater than or equal to 3.3 minutes is 0.3085.

For a group of 25 customers, 25×0.3085 = 7.7, i.e. 8 customers only experience the improvement in wait time.

the manager claim is therefore rejected.

4 0
3 years ago
What is the absolute value of 4x+1 equals 3
Maru [420]

Answer:

.5 (1/2)

Step-by-step explanation:

First you need to solve the equation and find its answer. In this case, 4x+1=3 would equal 1/2 (in this case it'll be .5) Then you need to figure out how far it is from 0. Which is easy, since absolute value is always positive. Your answer will be .5

3 0
3 years ago
Consider the following hypothesis test: H 0: 20 H a: &lt; 20 A sample of 50 provided a sample mean of 19.4. The population stand
goblinko [34]

Answer: p-value is 0.016.

Step-by-step explanation:

Since we have given that

H_0:\mu=20\\\\H_a:\mu

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We need to find the test statistic value which is given by

z=\dfrac{\bar{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\\\z=\dfrac{19.4-20}{\dfrac{2}{\sqrt{50}}}\\\\\\z=\dfrac{-0.6}{0.28}\\\\z=-2.14

p-value is given by

P(Z>Z_{critical})\\\\=P(Z>-2.14)\\\\=0.016

Hence, p-value is 0.016.

8 0
3 years ago
Casey was the first customer to receive both a free cookie and a free muffin. What number customer was Casey? Show or explain ho
faust18 [17]

Answer:

she was the 18th customer

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every 6 gets a cookie and every 9th gets a muffin

she is the third to get a cookie and the second to get a muffin.

3 0
3 years ago
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