Question: Question (1) The (Male/Female) students' scores in a certain statistics course follow a normal distribution. A random sample of size 10 was chosen from the

Question (1)

The (Male/Female) students' scores in a certain statistics course follow a normal distribution. A random sample of size 10 was chosen from the male students and another random sample of size 8 was chosen from the female students. The sample results were as follows:

Mean Standard Deviation

Males 69.7 15.34

Females 73.5 13.30

Assume that the variances of the grades for males and females in this course are equal, and use a 0.02 significance level to test for the equality of the average grades for males and females

Question (2)

Hyper-one Store chain issues its own credit card. Lisa, the credit manager, wants to find out if the mean monthly unpaid balance is more than $400. The level of significance is set at 0.05. A random check of 172 unpaid balances revealed the sample mean to be $407 and the sample standard deviation to be $38. Should Lisa conclude that the population mean is greater than $400, or is it reasonable to assume that the difference of $7 is due to chance?

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

ABCD is an equal four-person partnership that has a fiscal year ending on June 30. For its fiscal year ending on June 30, 2022, ABCD has $732,000 in ordinary income, $200,000 of which was earned...

QUESTION 33 A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random without replacement. What is probability that both balls drawn are red? O A. 2/49 O B. 1/21 O C. 1/7 O D....

1) The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 35 ounces and a standard deviation of 9 ounces. Use the Standard...

QUESTION 1 A population has an average of 150,000 with a standard deviation of 27,000.A random sample of 81 items is chosen.What is the standard error? QUESTION 2 A population has a mean of 250, size...

Business law Note 1, we assume 1K = 1000, IM = 1,090,000, 1G = 1,000,000,000, 1Byte = 8 bits Note 2, Is = 1,000 ms = 1,000,000us 1. (20 points) We are sending a MP3 file of 1,000,000 bits from a...

Consider the following Questions Question 1 1want to ask something about cerebrovascular accident (CVA). Can you please tell me how we can rapidly pinpoint the exact anatomical site of the...

1. (2 points). (TrueFalse) The median is very sensitive to extreme data points. 2. (2 points). (TrueFalse) The t -distribution approaches the standard normal distribution as sample size increases....

Your colleague has said they have discovered a way to get O(1) category performance for both insert and remove in a priority queue. Their description of the data structure and algorithms is as...

My problem reads: Today, there is a lack of financial education and financial literacy being taught in public high schools, resulting in more students graduating with debt, contributing to the...

QUESTION ONE a) A population has a mean of 100 and variance of 81. A random sample size of 25 is collected. i. What is the mean and standard deviation of the sampling distribution? [4 marks] ii. What...

1. What percentage of a distribution corresponds to z = -2.3? A. 1.04% B. 1.07% C. 98.93% D. 9.68% 2. An experiment testing the effectiveness of a new headache medicine on 79 volunteers has three...

Maris Brothers, Inc., needs a cash disbursement schedule for the months of April, May, and June. Use the format of Table 4.9 (on page 130) and the following information in its preparation. Sales:...

The following data represent the results from an independent-measures study comparing two treatment conditions. F-ratio: p-value: Treatment One t-statistic: 6.7 5.9 5.5 7.4 6.5 6.5 Conduct ANOVA with...

Debts which cannot be avoided by bankruptcy include: Debts incurred by means of fraud Educational loans Claims for alimony and child support Taxes incurred within three years Wages due employees...

Carney Company manufactures cappuccino makers. For the first eight months of 2013, the company reported the following operating results while operating at 80% of plant capacity: An analysis of costs...