Mr. James McWhinney, president of Daniel-James Financial Services, believesthere is a relationship between the number of client contacts and the dollaramount of sales. To document this assertion, Mr. McWhinney gathered thefollowing sample information. The x column indicates the number of clientcontacts last month, and the y column shows the value of sales ($ thousands)last month for each client sampled. (Round the final answers to 2 decimalplaces.)Number ofContacts,X4349442434Sales($thousands),3$75108743132Number ofContacts,21313361818Sales($ thousands),$2425503120a. Determine the 95% confidence interval, in thousands of dollars, for the meanof all sales personnel who make 54 contacts.b. Determine the 95% prediction interval, in thousands of dollars, for aparticular salesperson who makes 54 contacts.

The formula for the confidence interval is,where,denotes the predicted value of yse denotes the…

Answered: Mr. James McWhinney, president of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A sample of 5 students were asked how much money they were carrying. These were their answers: $75, $2, $5, $0, $5. Why is the median more informative than the mean? The median is higher than the mean. O The mean is skewed by the outlier $75. O The mean is higher than the median. O The mean is skewed by the outlier $0.
A data set has five values. The largest value is 31. The median is 21. The mode is 16. The mean is 21.2. The data, in order from least to greatest is:
For each problem, you must state the hypotheses, calculate the test statistic, and explain your decision. The following table reports the relationship between class standing and political orientation for a random sample of 267 college students. a. The table is constructed assuming that class standing is the independent variable. Please add %s in the appropriate position (columns or rows) to describe the pattern of the relationship. b. Is there a statistically significant relationship between these variables?
A recent poll of Ms. Vergara's 160 students revealed the following. They were asked if they did or did not study hard for finals. They were also asked if they were or were not proud of their final results. 115 students said they studied hard and 105 students said they were proud of their results. 20 students said they didn't study hard AND weren't proud of their results. What percentage of students studied hard OR were proud of their results? Use that same two-way table to help you.
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A student’s test grades are: 85, 75, 100, 90, and 90. On the two questions below, round to the nearest whole number when relevant. Show calculations and clearly report answers to each of the two questions below. a. What is the mean, or average, test grade for this student? b. What is the median test grade?
Please see picture. Need this asap please and thank you.
The data set below contains the number of hours that a sample of 10 college students spent playing video games. 7,11,19,14,16,4,10,16,13,10 -Find the median number of the data set.
In planing for his children to go back to school Susan buys several items at a discount. Five items at $1.29 each, three at $1.49 each, six at $1.79 each and nine at $0.99 each. What was the median cost of all items? $1.48 Oa. Ob. O b. $1.99 c. Oc. $1.33 O d. $1.39 $1.29 O e.
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Net Worth. The Board of Governors of the Federal Reserve System publishes information on family net worth in the Survey of Consumer Finances. In 2010, the mean net worth of families in the United States was $498.8 thousand and the median net worth was $77.3 thousand. Which measure of center do you think is more appropriate? Explain your answer.
Please help find the tstat. Thanks.

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