3 years ago

Someone help me pwease

Mathematics

1 answer:

34kurt3 years ago

6 0

1f
2b
3A
4D
5E
I think this is the answer,I could be wrong though-

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A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit

sergiy2304 [10]

Answer:

95% Confidence interval: (39.43, 61.58)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = $50.50

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation = 20

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.1447$

$=50.50 \pm 2.1447(\dfrac{20}{\sqrt{15}} ) \\\\= 50.50 \pm 11.0751 \\= (39.4249,61.5751)\\\approx (39.43, 61.58)$

95% Confidence interval: (39.43, 61.58)

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3 years ago

PRACTICE

Dennis_Churaev [7]

Answer:

Step-by-step explanation:

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3 years ago

Someone help me with this problem.

Klio2033 [76]

Download Photomath and there

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3 years ago

HELP ASAP!!! IM BEING TIMED!!

Wewaii [24]

Answer:

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Step-by-step explanation:

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3 years ago

C+d^2=36 is this linear or nonlinear?

Tanya [424]

Answer:

non linear

Step-by-step explanation:

linear is a straight line and c= 36-d^2 is not a straight line. it would be a porabola

8 0

3 years ago

Someone help me pwease ​

Someone help me pwease