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Studentka2010 [4]
3 years ago
6

7. Courtney is an English as a second language (ESL) teacher. She is interested in determining whether reading or writing the se

cond language is more effective in helping students learn it. How should Courtney study this? Research questions: Does writing or reading more effectively help students learn a second language?
Methodology Selected:
Types of Data Collected:
Brief Procedure:
Mathematics
1 answer:
Rom4ik [11]3 years ago
8 0

Answer: what

Step-by-step explanation:

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An entrepreneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past 5 years, the
Bond [772]

Answer:

a. Z-test of a population mean.

Step-by-step explanation:

The current owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75.

This means that we have a large sample, which means that we can consider this to be the standard deviation for the population, which eliminates the t-test, leaving options a and c.

Population mean or proportion?

Mean, as a proportion is a value between 0 and 1, while average revenue may have lots of possible values. So the answer is given by option A.

6 0
3 years ago
I need a summary please. I have a notebook check on the 4th <br><br>sorry for bad hand writing​
Galina-37 [17]
What do you need a summary on?
6 0
4 years ago
What is the length of the line segment with endpoints (11,−4) and (−12,−4) ?
statuscvo [17]
Distance = √[(-12 - 11)^2 +(-4 - (-4))^2]
= √(529+0)
= 23

answer
<span>length of the line segment = 23</span>
6 0
4 years ago
In the equation y = 8x - 2, name the slope (m) and the y-intercept (b). Type in the value for each below. *
kozerog [31]

y = mx + b

m = Slope

b = y-intercept

y = 8x - 2

m = 8

b = -2

y = 1/4x + 6

m = 1/4

b = 6

5 0
3 years ago
Read 2 more answers
Karen wants to advertise how many chocolate chips are in each big chip cookie at her bakery. she randomly selects a sample of 69
Tomtit [17]

Answer: (10.1989,\ 11.0011)

Step-by-step explanation:

Given : Sample size : n=69

Sample mean : \overline{x}=10.6

Standard deviation : s=1.7

Significance level : \alpha:1-0.95=0.05

Then , Critical value : z_{\alpha/2}=1.96

The formula to confidence interval is given by : -

\overline{x}\pm z_{\alpha/2}\dfrac{s}{\sqrt{n}}\\\\\Rightarrow\ 10.6\pm (1.96)\dfrac{1.7}{\sqrt{69}}\\\\\approx10.6\pm0.4011=(10.6-0.4011,10.6+0.4011)=(10.1989,\ 11.0011)

Hence, the 95% confidence interval for the number of chocolate chips per cookie for big chip cookies= (10.1989,\ 11.0011)

8 0
4 years ago
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