How should office workers prevent workplace hazards?

A typing instructor builds a regression model to investigate what factors determine typing speed for students with two months of

boyakko [2]

Answer:

The range that has a 95.45% probability that that student's typing speed will be in two months is [49.5, 65.5].

Explanation:

The compete question is:

A new student is taking 2 hrs of typing instruction per week, will practice 5 hrs per week and must type 2.5 hours per week for work. If the standard error of the estimate is 4, within what range do we have a 95.45% probability that that student's typing speed will be in two months?

Solution:

The regression equation formed by the typing instructor to investigate what factors determine typing speed for students with two months of instruction is as follows:

$Y' = 11 + 7x_{1} + 5x_{2} + 3x_{3}$

Here,

Y' = typing speed in words per minute

x₁ = hours of instruction per week

x₂ = hours of practice per week

x₃ = hours of typing per week necessary for school or work

Compute the value of Y' for the given values of x₁, x₂ and x₃ as follows:

$Y' = 11 + 7x_{1} + 5x_{2} + 3x_{3}$

$=11+(7\times 2)+(5\times 5)+(3\times 2.5)\\=11+14+25+7.5\\=57.5$

So, the typing speed of this student in words per minute is 57.5.

The range providing the (1 - α)% prediction interval for values of Y' is:

$Y=[Y'\pm t_{\alpha/2, (n-2)}\times SE]$

Since the data selected is for 2 months the sample size is too large.

The critical value of t is 2.

Compute the range as follows:

$Y=[Y'\pm t_{\alpha/2, (n-2)}\times SE]$

$=[57.5\pm 2\times 4]\\\\=[57.5\pm 8]\\\\=[49.5, 65.5]$

Thus, the range that has a 95.45% probability that that student's typing speed will be in two months is [49.5, 65.5].

6 0

3 years ago

The owners of hotels whose services are produced and consumed at the same time know that consumers do not have the opportunity t

mixer [17]

Answer:

E) Satisfaction Guarantees

Explanation:

Satisfaction Guarantees also called Money-Back Guarantee is basically a straightforward assurance that a refund will be produced if a purchaser is not satisfied with a product or service.

This term is widely used in advertisements or commercials advertising a product or service and has been used for a long time as a marketing strategy.

8 0

3 years ago

What is the HHI for an industry where 8 firms each have a market share of 10%, 2 firms each have a market share of 5%, and 10 fi

atroni [7]

Answer:

860

Explanation:

The HHI is calculated by squaring the market share of each firm in the industry.

8(10²) + 2(5²) + 10(1²) = 800 + 50 + 10 860

5 0

3 years ago

when preparing a representative sample from a list of 200 customers who complained about errors in their statements, a _____ mi

makvit [3.9K]

Systematic sample

When preparing a representative sample from a list of 200 customers who complained about errors in their statements, this type of sample might select every tenth customer for review.

4 0

4 years ago

Ups devices typically have capacities that may run up to __________ va.

Brut [27]

Ups devices typically have capacities that may run up to 1000 va.

UPS (uninterrupted power supply) is designed so an electrical equipment could still provide an emergency source of power in case the main power input fails to do so. In order to fulfill this function, a UPS device requires a pretty high voltage capacity.

7 0

3 years ago