What is the upper quartile of the box plot graph?

Mathematics

1 answer:

julia-pushkina [17]3 years ago

3 0

Answer: Choice A) 90

The upper quartile, aka the third quartile (Q3), is visually represented by the right-side edge of the box, which is at 90 on the number line.

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The mean waiting time at the drive-through of a fast food from the time the order is placed to the time the order is recieved is

Alexxandr [17]

Answer:

1.) No ;

2.) - 0.931

3.) 0.1785

Step-by-step explanation:

Given :

μ = 84.3 ; xbar = 81.9 ; s = 17.3

H0 : μ = 84.3

H1 : μ < 84.3

The test statistic :

(xbar - μ) ÷ (s/√(n))

(81.9 - 84.3) / (17.3/√45)

-2.4 / 2.5789317

= - 0.9306

= - 0.931

Using the test statistic, we could obtain the Pvalue : df = n - 1 ; df = 45 - 1 = 44

Using the Pvalue calculator :

Pvalue(-0.9306, 44) = 0.1785

Using α = 0.05

The Pvalue > α

Then we fail to reject H0; and conclude that there is no significant evidence to support the claim that the mean waiting time is less than 84.3

5 0

2 years ago

The following table presents the time taken to review articles that were submitted for publication to a particular journal durin

belka [17]

A) Variance = 10.24

B) Standard Deviation = 3.2

One of the measurements of dispersion is the standard deviation, which is exclusively used for quantitative data. It aids in determining if the data's mean is a suitable measurement to reflect the core value.

TIME FREQUENCY(f) MIDPOINT(x) d d² fd fd²

0 - 0.9 43 0.45 -3 9 -129 387

1.0 - 1.9 17 1.45 -2 4 -34 68

2.0 - 2.9 19 2.45 -1 1 -19 19

3.0 - 3.9 18 3.45 0 0 0 0

4.0 - 4.9 14 4.45 1 1 14 14

5.0 -5.9 16 5.45 2 4 32 64

∑f = 127

∑fd = -136

∑fd² = 552

$d = \frac{x - 3.45}{1}$