While the frequency of online shopping is lower for men as compared to women, men are the
Question:
While the frequency of online shopping is lower for men as compared to women, men are the big spenders when it comes to making costly online purchase. A manager at the online retail store has complied the annual revenue from the store’s 80 men and 80 women online shoppers. Assume that revenues are normally distributed. The accompanying table shows shows a portion of the data.
a. At the 5% level of significance, test if the standard deviation of the revenue for the store’s online men shoppers differs from 100.
b. At the 5% level of significance, test if the standard deviation of the revenue for the store’s online women shoppers differs from 100.
| Men | Women |
| 1676 | 2043 |
| 1493 | 2023 |
| 1752 | 1701 |
| 1715 | 1777 |
| 1459 | 1782 |
| 1547 | 1835 |
| 1710 | 2019 |
| 1614 | 1966 |
| 1722 | 1921 |
| 1608 | 1945 |
| 1637 | 1899 |
| 1568 | 1991 |
| 1511 | 1900 |
| 1780 | 1869 |
| 1404 | 1869 |
| 1565 | 1882 |
| 1833 | 1855 |
| 1700 | 1908 |
| 1691 | 1849 |
| 1531 | 1810 |
| 1615 | 1840 |
| 1629 | 1958 |
| 1722 | 1876 |
| 1579 | 1837 |
| 1500 | 1862 |
| 1634 | 1813 |
| 1476 | 1894 |
| 1432 | 1982 |
| 1681 | 1827 |
| 1721 | 1886 |
| 1609 | 1927 |
| 1605 | 1755 |
| 1567 | 1928 |
| 1374 | 1890 |
| 1625 | 1870 |
| 1674 | 1891 |
| 1734 | 1927 |
| 1534 | 1888 |
| 1471 | 1790 |
| 1575 | 1882 |
| 1770 | 1952 |
| 1559 | 1748 |
| 1530 | 1909 |
| 1539 | 1895 |
| 1866 | 1755 |
| 1501 | 1864 |
| 1619 | 1977 |
| 1758 | 1955 |
| 1646 | 1982 |
| 1701 | 1953 |
| 1556 | 1839 |
| 1462 | 2053 |
| 1854 | 1968 |
| 1694 | 1828 |
| 1708 | 1974 |
| 1420 | 1904 |
| 1698 | 2054 |
| 1599 | 1726 |
| 1721 | 1841 |
| 1556 | 1870 |
| 1629 | 1925 |
| 1626 | 1916 |
| 1438 | 1848 |
| 1564 | 1836 |
| 1654 | 1888 |
| 1760 | 1931 |
| 1787 | 1858 |
| 1577 | 1938 |
| 1777 | 1880 |
| 1498 | 1841 |
| 1815 | 1862 |
| 1783 | 1740 |
| 1653 | 2179 |
| 1540 | 1889 |
| 1399 | 1813 |
| 1822 | 1870 |
| 1494 | 1931 |
| 1798 | 2122 |
| 1411 | 1864 |
| 1685 | 2051 |
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Related Book For 
Business Statistics Communicating With Numbers
ISBN: 9781260716306
4th Edition
Authors: Sanjiv Jaggia, Alison Kelly
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