A cognitive psychologist is interested in whether increasing reading speed reduces comprehension. She has students complete a reading comprehension task before and after a six-week speed-reading course. In the beginning of the study, a randomly selected group of 81 students scored an average of 107 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of MD is normal. She plans to use a repeated-measures t test. The cognitive psychologist identifies the null and alternative hypothesis as:

Answer:

H0: Ud >= 0

H1: UD < 0

Step-by-step explanation:

We have the sample size = 81

Mean of x = 107

The alpha level was not given for me to help you calculate further.

This researcher wants to know if increasing reading speed brings about a decrease in the comprehension of the reader.

The hypothesis are

Null hypothesis

H0: U >= 0

Alternative hypothesis

H1: U < 0

Thank you

An executive traveled 1,930 miles by car and plane. He drove to the airport at an
average speed of 60 mph and the plane averaged 350 mph. The total trip took 8 hours.
How long did it take to get to the airport?

To visit his grandmother, Luis takes a train 6.376.376, point, 37 kilometers and a car 5.455.455, point, 45 kilometers.
How many kilometers is Luis's journey in total?

A store sells a package of 3 notebooks for $2. The point on the graph represents this ratio relationship. Which ordered pairs represent equivalent ratios that would also be on the graph? Choose all the correct answers. A (4, 6) B (6, 4) C (9, 6) D (12, 8) E (15, 9) F (16, 12)

Try it!
A(n) is the value of the nth term of the sequence
26, 39, 52, 65, 78. Is the domain of the function
continuous or discrete? Explain.
k
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ANSWER CORRECT FOR BRAINLIEST - 10 POINTS

Which step in the software development life cycle analyzes the scope of work?

Coding
Design
Planning & Analysis
Testing

It's too short. Write at least 20 characters to get a great answer.
ignore this.^

help

Marco’s model bridge is 9 centimeters taller than Sho’s model bridge. If Sho’s bridge is 31 centimeters tall, which equation could be solved to find the height of Marco’s bridge?

A car use 40 litres of petrol to travel 340 km.

how far will it travel on a full tank of 52 litres?

how many litres of petrol should it use for a journey of 250 km?

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A cohort study was undertaken to examine the association between high lipid level and coronary heart disease. Participants were classified as having either a high lipid level (exposed) or a low or normal lipid level (unexposed). Because age is associated with both lipid level and risk of heart disease, age was considered a potential confounder, and the age of each subject was recorded. The following data describes the study participants:Overall, there were 11,000 young participants and 9,000 old participants. Of the 4,000 young participants with high lipid levels, 20 of them developed CHD. Of the 6,000 old participants with high lipid levels, 200 of them developed CHD. In the unexposed, 18 young and 65 old participants developed CHD.1. Construct the appropriate two by two tables using the data given above. Be sure to label the cells and margins.2. Calculate the appropriate crude ratio measure of association combining the data for young and old individuals.3. Now, perform a stratified analysis and calculate the appropriate stratum-specific ratio measures of association. What are they?4. Do the data provide evidence of effect measure modification on the ratio scale? Justify your answer.

Name the type of transformation shown.
1.
2.
3.
4.

Annette bought 3 notebooks for $0.80 each and a pack of pens for $1.20. She gave the clerk some money and got back
$1.40 in change. How much money did Annette give the clerk

describe de manera clara y sencilla tres conceptos principales del tema anterior y explique su importancia​

Please welp me I need help

If the diameter
of Earth is 7918
miles, what is the
distance from its
surface to its core,
in miles?

pls help ............​

Please help me I need help — thank you if you help me. :)

Lydias hotel room number has three digits.The hundreds digit has a value of 40 Tens.The Tens digit is greater than 6. Which could be Lydias hotel room number?

Which matches the inequality?

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Jayden bought 4 cows for $325.00 each. He paid 1/3 down and paid the remainder the following week. How much did he owe?

What is 30% of $439 p
math is my worst subject

Peter lives in an apartment and pays the following expenses each month: electric bill, $34.80; TV streaming service,
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place.

Department stores are about to release a new makeup line, and a promotional kit will be sold for $42.75. The cost to produce the kits can be determined by the cost function, where x is the number of kits to be produced and sold:

C(x) = 28.25x + 8,250.

Type the correct answer in the box.

What is the monthly payment on a 15-year loan of $72,700 if the annual interest rate is 12%?

Need help with this question ASAP

Should you use theoretical or experimental probability to predict the number of times you will draw an M in 2,000 draws? Explain



No troll comments + don’t answer if you don’t know..
And I don’t want to see, attach a file here and then some wierd website name... Stop it’s not funny

Can you guys help me?

The graph shows a proportional relationship. Which equation matches the
graph?
A. y = 2
B. y = x
C. y = 4x
D. y = x

Give the coordinates and quadrant of Point Z.
A. (9, 10) Quadrant l
B. (10, 9) Quadrant l
C. 10, 9) Quadrant ll
D. (9, 10) Quadrant ll

the graph shows two lines,A and B
How many solutions are there for the pair of equations for all lines A and B? Explain your answer.