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True [87]
3 years ago
5

You're working at a marketing firm. The firm recently introduced a new smartphone to the US market and they are interested if mo

re than half of consumers in the US are familiar with the new product. The marketing firm surveyed 500 customers shopping for phones. Of those customers, 265 had heard of the new phone. What is the Z score for this test
Mathematics
1 answer:
frutty [35]3 years ago
5 0

Answer:

The Z score for this test is 1.3416

Step-by-step explanation:

According to the data given:

Null Hypothesis is: H0: p = 0.5

Alternative Hypothesis is: Ha: p > 0.5

Here the firm found 265 out of 500 heard pf the phone

p-cap = 265/500 = 0.53

n (sample size) = 500

Therefore, z = (p-cap – p)/√{p*(1-p)/n}

= (0.53 – 0.5)/√(0.5*0.5/500)

= 0.03/√(0.0005)

= 0.03/0.02236

= 1.3416

The Z score for this test is 1.3416

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Find the following: F(x, y, z) = e^(xy) sin z j + y tan^−1(x/z)k Exercise Find the curl and the divergence of the vector field.
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\vec F(x,y,z)=e^{xy}\sin z\,\vec\jmath+y\tan^{-1}\dfrac xz\,\vec k

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umka21 [38]

Answer:

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First, create equations. Let x equal the miles driven. The first plan expression  is 38 + 0.12x and the second plan expression is 51 + 0.08x. Setting these equal and solve for x: 38 + 0.12x = 51 + 0.08x -> 0.04x = 13 -> x = 325 miles.

The cost is found by substituting it into any of the expressions: 51 + 0.08(325) = 77 or 38 + 0.12(325) = 77

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3 years ago
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