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Aleonysh [2.5K]
3 years ago
13

For each part below answer(i) state the name of relevant hypothesis test:– One sample z-test for proportion– One sample t-test f

or mean– Matched pairs t-test for mean of difference– Independent two sample t-test for difference of means– Independent two sample z-test for difference of proportions(ii) define parameter(s) of interest and state the null and alternative hypotheses.Example : To test the claim that Startbucks Coffee’s daily sale in Twin Cities is higher than that in Des Moines, IA, you randomly select 30 stores from each location and calculate the sample daily sales mean for each state.Answer : Independent two sample t-test for difference of means. µ1: mean daily sale of Startbucks coffee’s in Twin Cities µ2: mean daily sale of Startbucks coffee’s in Des Moines, IA H0 : µ1 = µ2 vs H1 : µ1 > µ2a. Past experience indicates that the time required for high school seniors to complete a standardized test is a normal random variable with a mean of 35 minutes. A researcher wants to test the claim that high school seniors from 2019 requires less amount of time than before. A random sample of 20 high school seniors took 33.1 minutes to complete this test.b. A marketing expert for a pasta-making company believes that more than 40% of pasta lovers prefer lasagna. To test this claim, the researcher collected a random sample of 20 pasta lovers. 9 out of 20 choose lasagna over other pastas.c. Forty-four sixth graders were randomly selected from a school district. Then, they were divided into 22 matched pairs, each pair having equal IQ’s. One member of each pair was randomly selected to receive special training. Then all of the students were given an IQ test. The researcher wants to test if the special training has any effect.d. In a winter of an epidemic flu, the parents of 2000 babies were surveyed by researchers at a wellknown pharmaceutical company to determine if the company’s new medicine was better than their old medicine after two days. Among 120 babies who had the flu and were given the new medicine, 29 were cured within two days. Among 280 babies who had the flu and were given the old medicine, 56 recovered within two days. Test the company’s claim. 1 STAT 3011 Homework 8 (Due: Sunday. Nov. 18, 2018) Fall 2018e. An experiment investigated whether cell phone use impairs drivers’ reaction times, using an sample of 64 students from the University of Utah. Students were randomly assigned to a cell phone group or to a control group, 32 to each. On a simulation of driving situations, a target flashed red or green at irregular periods. Participants pressed a brake button as soon as they detected a red light. The control group listened to radio or audio book while they performed the simulated driving. The experiment measured each group’s mean response time over many trials.
Mathematics
1 answer:
pav-90 [236]3 years ago
8 0

Answer:

Step-by-step explanation:

Umm ?

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If A/B and C/D<br> are rational expressions, then<br> AxC/BxD = AxD/BxC<br> A. True<br> B. False
sdas [7]

Answer:

True

Step-by-step explanation:

If A/B and C/D are rational expression then

A/B*C/D

Or

A/B*C/D=A/C*B/D

It means that if A/B and C/D are rational expression then their product with each other will also be a rational expression.

6 0
2 years ago
A man is on a diet and goes into a shop to buy some turkey slices. He is given 3 slices which together weigh 1/3 of a pound, but
Ghella [55]
The three slices are each approximately 1/9 pound in weight, and, since 2/9 is less than 1/4, he can eat 2 whole slices and be okay. If he wants to eat partial slices, then he could eat 2 1/4 slices, as each slice weighs 4/36 pounds, so 2 slices would equal 8/36 pounds, leaving 1/36 pound left over in his diet, which is a quarter of the third slice.

2.25
6 0
3 years ago
Example of an irrational number that is less than 2 and greater than 1.5
disa [49]

For this case, the first thing you should do is take into account the irrational number definition.

An irrational number is one that can not be written as the quotient between two whole numbers.

Their number of decimals is unlimited and they are not periodic.

An irrational number within the specified domain is:

π/2 = 1.570796327    

Answer:

an example of an irrational number that is less than 2 and greater than 1.5 is:

π/2 = 1.570796327  

6 0
3 years ago
Jose prefers to walk to work when the weather
stich3 [128]

Answer:

independent: time (hours)

dependent: distance (miles)

Step-by-step explanation:

The independent variable would be time because it can be changed depending on his walking speed.

The dependent variable would be distance

6 0
2 years ago
6 m
dimulka [17.4K]

Answer:

51.63m^3

Step-by-step explanation:

The figure is made up of a rectangle, triangle and a semi circle

Area of the figure = Area of triangle + rectangle + semicircle

Area of the triangle = 1/2 * base * height

Area of the triangle = 1/2 * 3 * 5

Area of the triangle = 15/2

Area of the triangle = 7.5m^3

Area of the rectangle = Length * Width

Area of the rectangle = 6 * 5

Area of the rectangle = 30m^2

Area of the semicircle = πr²/2

Area of the semicircle = π(3)²/2

Area of the semicircle = 3.14(9)/2

Area of the semicircle = 3.14 * 4.5

Area of the semicircle = 14.13m^2

The area = 30 + 14.13+7.5

Area of the figure = 51.63m^3

7 0
3 years ago
Read 2 more answers
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