## Answers

**Given:**

A sample of ancient Egyptian skull breadths from two different time periods( 4000 B.C and 150 A.D) is given.

Sample size = n =13

Time Period | Mean | Standard deviation |

4000 B.C | 127.25 | 5.2847 |

150 A.D | 134.50 | 4.7809 |

The 95% confidence interval is given by

where, Z = 1.96

The 95% confidence interval for 4000 B.C skull breadths:

The 95% confidence interval for 150 A.D skull breadths:

We were unable to transcribe this image

127.25 + 1.96 * 5.2847 -) = 127.25 2.87 = (124, 130) V13

We were unable to transcribe this image

.
#### Similar Solved Questions

1 answer

##### A net force 28N is acting on a falling object. It experiences an air resistance of...

a net force 28N is acting on a falling object. It experiences an air resistance of 8.5 N. Accekeration due to gravity is 9.81 m/s2 what is the mass...

1 answer

##### Pls answer question 3-4 40. Heart-lung machines and artificial kidney machines BIO employ electromagnetic blood pumps....

pls answer question 3-4 40. Heart-lung machines and artificial kidney machines BIO employ electromagnetic blood pumps. The blood is con- QIC fined to an electrically insulating tube, cylindrical in prac- S tice but represented here for simplicity as a rectangle of interior width w and height...

1 answer

##### 37. Life expectancy in the U.S. is comparable to similar developed nations A. True B. False...

37. Life expectancy in the U.S. is comparable to similar developed nations A. True B. False 38. Lifestyle modification can decrease the risks and acquisition of the current chronic diseases that plagues U.S. citizens A. True B. False 39. Electronic Medical Records should decrease the incidence of ia...

1 answer

##### Refer to the figure at right. Given the indifference map and budget constraint represented at right,...

Refer to the figure at right. Given the indifference map and budget constraint represented at right, the consumer will maximize utility when she consumes at O A. point A. B. point B. O c. point c. OD. either points A or B. Quantity of Good A per Week Quantity of Good B per Week...

1 answer

##### Have you ever held a leadership position in any of your employment experiences? What can you tell us about it? Was it po...

Have you ever held a leadership position in any of your employment experiences? What can you tell us about it? Was it positive or negative?...

1 answer

##### Find the present value Find the present value PV of the annuity account necessary to fund...

find the present value Find the present value PV of the annuity account necessary to fund the withdrawal given. Hint [See Quick Example 3.] (Assume end-of-period withdrawals and compounding at the same intervals as withdrawals. Round your answer to the nearest cent.) $800 per month for 20 years...

1 answer

##### Without the use of matlab. (3) [1 mark] Find the step response of the unity negative...

Without the use of matlab. (3) [1 mark] Find the step response of the unity negative feedback system with the forward path trasfer function of...

1 answer

##### Elia Corporation has two divisions, Refining and Extraction. The company's primary product is tubol OL. Each...

elia Corporation has two divisions, Refining and Extraction. The company's primary product is tubol OL. Each division's costs are provided below. Extraction Refining Variable costs per barrel of oil Fred costs per barrel of oil Variable costs per barrel of Fixed costs per barrel of o 55 $28 ...

1 answer

##### Just want the answer for E (B) Consider the Endothermic reaction below (27 Points) 5 CoC142-...

Just want the answer for E (B) Consider the Endothermic reaction below (27 Points) 5 CoC142- + 6H20 (Blue) Co(H20)6 2+ 4C1 (Pink) (C) If few more drops of HCl is added to the above equilibrium in solution (i) Where will the equilibrium shift and briefly explain ......... (ii) What color will you ...

1 answer

##### Assume the random variable X has a binomial distribution with the given probability of obtaining a...

Assume the random variable X has a binomial distribution with the given probability of obtaining a success. Find the following probability, given the number of trials and the probability of obtaining a success. Round your answer to four decimal places. P(X=6), n=7, p=0.4...

1 answer

##### Saved Maria Am Corporation uses the weighted average method in its process costing system. The Baking...

Saved Maria Am Corporation uses the weighted average method in its process costing system. The Baking Department is one of the processing departments in its strudel manufacturing facility. In June in the Baking Department, the cost of beginning work in process Inventory was $4,830, the cost of endin...

1 answer

##### QUESTION FIVE (20 MARKS) a) The marks obtained in a Business Statistics CAT are normally distributed...

QUESTION FIVE (20 MARKS) a) The marks obtained in a Business Statistics CAT are normally distributed with mean of 23and standard deviation of 4.2. Find the probability that a randomly selected student scores: (i) More than 25 marks (ii) Between 20 and25 marks (iii) Less than the mean mark? (2 Marks)...

1 answer

##### Constants 1 Peniodic Table ▼PartA In a technique used for surface analysis callerd auger electron spectroscopy...

Constants 1 Peniodic Table ▼PartA In a technique used for surface analysis callerd auger electron spectroscopy (AES), electrors are accelerated toward a metal surface. These What is the de Broglie wavelength of this electron? KE-| mt,2; 1 electron volt (eV)-1.602 × 10-19 JI electrons cau...

1 answer

##### What are the nature of rites of passage in American society today. Do we have more...

What are the nature of rites of passage in American society today. Do we have more of them? Fewer? Do they have to be religious in nature or do we have many secular rites as well?...