Ask question

Ask question

All categories

2 years ago

13

A local flower shop advertises that 4 out of every 5 flower seeds will grow. If Janie plants 40 of these flower seeds in her gar

den, how many seeds can she expect to grow?

1 answer:

Karolina [17]2 years ago

4 0

32 seeds
4:5 ratio
4x2 | 5x2
8:10
40/10 = 4
8 x 4

You might be interested in

I don't get this can someone help me with this

kati45 [8]

P= $48c + $17.76 hope this helps

8 0

3 years ago

I NEED HELP SOMEONE ASAP

Dvinal [7]

Answer: x⁴y²⁰

Step-by-step explanation: Distribute the exponent ⁴ over the parentheses

(x y⁴)⁴ becomes x⁴y¹⁶ (multiply exponents)

then take the 4th root of y¹⁶ (divide the exponent of the radicand by the index) ⁴√y¹⁶ becomes y⁴

Then multiply the factors. Add exponents

x⁴y¹⁶ * y⁴ becomes x⁴y²⁰

8 0

3 years ago

-4 < - 13( a + 6) -1 7

krek1111 [17]

Answer:

-4 < -13(a+6)-17

-4<-13a+(-78)-17

-4<-13a+(-95)

-4<-13a-95

91<-13a

-91>13a

-7>a

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What’s a absolute deviation

Sergeeva-Olga [200]

Answer:

Absolute deviation is when you find the mean of a data set, then the difference between each number and the mean, then the average f the differences.

Step-by-step explanation:

Maddox: |10-9| = 1

Enrique: |10-13| = 3

Gloria: |10-9| = 1

McKenna: |10-10| = 0

Asher: |10-9| = 1

Hannah: |10-9| =

Danielle: |10-10| = 0

Katy: |10-10| = 0

Timothy: |10-11| = 1

Gentry: |10-9| = 1

Now you have the numbers: 1, 3, 1, 0, 1, 1, 0, 0, 1, 1,

Now find the mean of those numbers:

$\frac{1 + 3+1+0+1+1+1+0+0+1+1}{10} =\frac{10}{10} =1$

The absolute deviation is 1.

6 0

3 years ago

A researcher posed a null hypothesis that there was no significant difference between boys and girls on a standard memory test.

kompoz [17]

Complete Question

A researcher posed a null hypothesis that there was no significant difference between boys and girls on a standard memory test. He randomly sampled 40 girls and 40 boys in a community and gave them the standard memory test. The mean score for girls was 68 and the standard deviation of mean was 5.0. The mean score for boys was 66 and the standard deviation of mean was 5.0. What is the p-value and your conclusion at alpha 0.05

Answer:

The p-value is $p-value =0.073614$

The conclusion is

There is sufficient evidence to support the claim that there was no significant difference between boys and girls on a standard memory test

Step-by-step explanation:

From the question we are told that

The sample size of boys and girls is $n_1= n_2 = n = 40$

The standard deviation is $s_1= s_2 = s = 5$

The level of significance is $\alpha = 0.05$

The sample mean for boys is $\= x_1 =66$

The null hypothesis is $H_o : \mu_1 = \mu_2$

The alternative hypothesis is $H_a : \mu_1 < \mu_2$

Generally the test statistics is mathematically represented as

$z = \frac{\= x_1 - \= x_2 }{ \sqrt{\frac{s_1 ^2 }{n_1} + \frac{s_2 ^2 }{n_1} } }$

=> $z = \frac{66 -68 }{ \sqrt{\frac{5^2 }{40} + \frac{5 ^2 }{40} } }$

=> $z = -1.789$

From the z table the area under the normal curve to the left corresponding to -1,789 is

$P(Z < -.1789 ) = 0.036807$

Generally the p-value is mathematically represented as

$p-value = 2 P(Z < -.1789 )$

=> $p-value = 2 * 0.036807$

=> $p-value =0.073614$

From the values obtained we see that $p-value < \alpha$ hence

The decision rule is

Fail to reject the null hypothesis

The conclusion is

There is sufficient evidence to support the claim that there was no significant difference between boys and girls on a standard memory test

3 0

3 years ago