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pishuonlain [190]
2 years ago
6

WILL GIVE BRAINLIEST!!!!!

Mathematics
1 answer:
Phoenix [80]2 years ago
3 0
It’s either A or B but I would choose B as the correct answer
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a homeowner wants to carpet 2 rooms that each measure 12 feet by 15 feet. how many square yards of carpet should be ordered?
amm1812
12 x 15 = 180

180 x 2 = 360

360 square yards of carpet should be ordered.
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Which pair of triangles are congruent by ASA ?
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Your answer is going to be letter D.)?
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A manager of a grocery store wants to determine if consumers are spending more than the national average. The national average i
strojnjashka [21]

The valid conclusions for the manager based on the considered test is given by: Option

<h3>When do we perform one sample z-test?</h3>

One sample z-test is performed if the sample size is large enough (n  > 30) and we want to know if the sample comes from the specific population.

For this case, we're specified that:

  • Population mean = \mu = $150
  • Population standard deviation = \sigma = $30.20
  • Sample mean = \overline{x} = $160
  • Sample size = n = 40 > 30
  • Level of significance = \alpha = 2.5% = 0.025
  • We want to determine if the average customer spends more in his store than the national average.

Forming hypotheses:

  • Null Hypothesis: Nullifies what we're trying to determine. Assumes that the average customer doesn't spend more in the store than the national average. Symbolically, we get: H_0: \mu_0 \leq \mu = 150
  • Alternate hypothesis: Assumes that customer spends more in his store than the national average. Symbolically H_1: \mu_0 > \mu = 150

where \mu_0 is the hypothesized population mean of the money his customer spends in his store.

The z-test statistic we get is:

z = \dfrac{\overline{x} - \mu_0}{\sigma/\sqrt{n}} = \dfrac{160 - 150}{30.20/\sqrt{40}} \approx 2.094

The test is single tailed, (right tailed).

The critical value of z at level of significance 0.025 is 1.96

Since we've got 2.904 > 1.96, so we reject the null hypothesis.

(as for right tailed test, we reject null hypothesis if the test statistic is > critical value).

Thus, we accept the alternate hypothesis that customer spends more in his store than the national average.

Learn more about one-sample z-test here:

brainly.com/question/21477856

3 0
1 year ago
Read 2 more answers
4. Ms. Hope is five times as old as her daughter. The sum of
olga2289 [7]
5x+x=42
X=7
The daughter is 7
Check work 7 times 5 is 35, 35 plus 7 is 42
5 0
3 years ago
Given jkl uvw and uvw abc complete the following statements
hammer [34]

We don't understand this question can you please clarify it:D

6 0
2 years ago
Read 2 more answers
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