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Serjik [45]
3 years ago
14

You are planting 47 flowers but want them to go into 6 rows . How many flowers will be in each row ?

Mathematics
1 answer:
Darina [25.2K]3 years ago
4 0

Answer:

<u><em /></u>7 flowers with 4 flowers left over

Step-by-step explanation

47÷6

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An appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W. From pre
melamori03 [73]

Answer:

We conclude that a compact microwave oven consumes a mean of more than 250 W.

Step-by-step explanation:

We are given that an appliance manufacturer claims to have developed a compact microwave oven that consumes a mean of no more than 250 W with a population standard deviation of 15 W.

They take a sample of 20 microwave ovens and find that they consume a mean of 257.3 W.

Let \mu = <u><em>mean power consumption for microwave ovens.</em></u>

So, Null Hypothesis, H_0 : \mu \leq 250 W     {means that a compact microwave oven consumes a mean of no more than 250 W}

Alternate Hypothesis, H_A : \mu > 250 W     {means that a compact microwave oven consumes a mean of more than 250 W}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about the population standard deviation;

                                T.S. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean power consumption for ovens = 257.3 W

            σ = population standard deviation = 15 W

            n = sample of microwave ovens = 20

So, <em><u>the test statistics</u></em>  =  \frac{257.3-250}{\frac{15}{\sqrt{20} } }

                                      =  2.176

The value of z test statistics is 2.176.

<u>Now, at 0.05 significance level the z table gives critical value of 1.645 for right-tailed test.</u>

Since our test statistic is more than the critical value of t as 2.176 > 1.645, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that a compact microwave oven consumes a mean of more than 250 W.

7 0
3 years ago
What is 10th term in 3,8,13,18?
skad [1K]
3+5=8+5=13 so if you keep doing this you  will get 48 which is the answer
5 0
3 years ago
12.A taxi service charges you $ 1.50 plus
RoseWind [281]

Answer:

20 miles

Step-by-step explanation:

Add $1.50 plus $0.60 times 20 which is $13.50

The number you multiply to get to $13.50 is the amount of miles

6 0
2 years ago
Help find the perimeter! Please help! (30 points)
lord [1]
The perimeter is 16, according to my calculations.
5 0
3 years ago
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