The price per share of stock for a sample of companies was recorded at the beginning of the first financial quarter and then again at the end of the first financial quarter. How stocks perform during the first quarter is an indicator of what is ahead for the stock market and the economy. Use the sample data in the file StockQuarter to answer the following. Click on the datafile logo to reference the data. Beginning of 1st end of 1stCompany Quarter QuarterBank of New York Mellon 53.82 54.19 Kraft Foods 77.02 55.70 E.I. du Pont de Nemours and Company 109.00 102.57 Consolidated Edison 83.58 79.95 Johnson & Johnson 139.23 126.01 Union Pacific 135.78 132.73 Comcast 41.07 32.06 Applied Materials 53.04 50.91 Pfizer 36.44 35.40 General Electric 17.98 14.05 AT&T 38.54 32.54 Cisco Systems 38.86 44.83 Home Depot 188.03 184.63 JP Morgan Chase 107.95 108.78 Procter & Gamble 90.65 71.96 Verizon 53.53 48.82 Devon Energy 42.23 36.20 Lilly 84.68 79.07 Microsoft 85.95 95.00 Coca Cola 45.59 42.59 Qualcomm 65.20 50.82 Exxon Mobil Corporation85.03 76.95 PG&E Corporation 44.49 46.27 Oracle Corporation46.63 45.95 Chevron 127.58 129.86 a. Let denote the percentage change in price per share for company whereUse the sample mean of these values to estimate the percentage change in the stock price over the first quarter. Do not round intermediate calculations. Enter negative value as negative number, if any. d1 = end of 1st quarter- beginnning of 1st quarter / beginning of 1st quarter (to 3 decimals) b. What is the 90% confidence interval estimate of the population mean percentage change in the price per share of stock during the first quarter? Do not round intermediate calculations. Enter negative values as negative numbers, if any. confidence interval (,) ( to 3 decimals)
The price per share of stock for a sample of companies was recorded at the beginning of the first financial quarter and then again at the end of the first financial quarter. How stocks perform during the first quarter is an indicator of what is ahead for the stock market and the economy. Use the sample data in the file StockQuarter to answer the following.
Click on the datafile logo to reference the data.
Beginning of 1st end of 1st
Company Quarter Quarter
Bank of New York Mellon 53.82 54.19
Kraft Foods 77.02 55.70
E.I. du Pont de Nemours and Company 109.00 102.57
Consolidated Edison 83.58 79.95
Johnson & Johnson 139.23 126.01
Union Pacific 135.78 132.73
Comcast 41.07 32.06
Applied Materials 53.04 50.91
Pfizer 36.44 35.40
General Electric 17.98 14.05
AT&T 38.54 32.54
Cisco Systems 38.86 44.83
Home Depot 188.03 184.63
JP Morgan Chase 107.95 108.78
Procter & Gamble 90.65 71.96
Verizon 53.53 48.82
Devon Energy 42.23 36.20
Lilly 84.68 79.07
Microsoft 85.95 95.00
Coca Cola 45.59 42.59
Qualcomm 65.20 50.82
Exxon Mobil Corporation85.03 76.95
PG&E Corporation 44.49 46.27
Oracle Corporation46.63 45.95
Chevron 127.58 129.86
a. Let denote the percentage change in price per share for company whereUse the sample
d1 = end of 1st quarter- beginnning of 1st quarter / beginning of 1st quarter
(to 3 decimals)
b. What is the 90% confidence
confidence interval (,) ( to 3 decimals)
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